Re: [MBZ] replacing valve stem seals in '85 300TD
Its really easy to tell when you are at TDC. You just have to be careful. I was overly anal about it and had no problems. Old seals were swapped I/E. -Rolf On 03/15/2011 04:11 PM, andrew strasfogel wrote: It's statements like this that discourage me from trying this job on my own: Then remove the spring. If the valve falls in the piston then the head has to come off. On Tue, Mar 15, 2011 at 3:30 PM, Rolfr...@winmutt.com wrote: I have done this job and it is straight forward, just remove the rocker arms rotate the cylinder you are working on to TDC and then remove the two nuts, retainer cap, spring and replace the valve stem. Great chance to replace the roto caps (top nut). The important thing here is to make DAMN sure you are at TDC on that cylinder. I did this by pushing down on the valve spring (valve dully assempled) with a wooden handle (per FSM I think). It is clearly evident when the cylinder is and is not at TDC. Even then I kept a plastic edge against the valve when taking off the nuts and the plate on top. Once that is done, put the nut back on and then let the valve down until it rests on the piston. Then remove the spring. If the valve falls in the piston then the head has to come off. Another thing, while the valves are loose you can slide them up and down, they should be smooth. Once of mine was biting a bit, 1yr later I have a sticking valve. -Rolf On 03/15/2011 09:22 AM, andrew strasfogel wrote: Sorry if I am a bit late coming into this conversation but... I never heard of anyone doing this job on a Mercedes diesel - just on the W107 V8 models, e.g 1978 450 SL C. What are the symptoms you hope to cure with this repair and how do you know it will work? on the W107s it just buys some time on the inevitable need for a valve job. On Mon, Mar 14, 2011 at 10:01 PM, Dan Penofflwb...@yahoo.com wrote: I may be off base here, but my recollection of this job does not require removal of the cam, just the cam followers. You use a valve spring compressor for removal of the followers, after which you can easily remove the valve springs and keepers. Dan Sent from my iPod On Mar 14, 2011, at 2:45 PM, glenn browng_010...@hotmail.com wrote: For those of you who may have done this job before, the MB workshop engine manual indicates in step 1 of job 05-270 to Remove rocker arms with rocker arm brackets (05-235). Other than what I consider to be the nightmare scenario of disconnecting the cam, tying down the timing chain to the sprocket, etc., I don't see an easy way to remove the rocker arms and brackets. Any clues other than the nightmare scenario? Also, do the rocker arm brackets just sit on top of the block or are there studs on the bottom of the rocker arm brackets which extend/lock into the head? TIA. G. M. Brown Brevard, NC -- next part -- A non-text attachment was scrubbed... Name: removing rocker arms brackets Q 031411.jpg Type: image/jpeg Size: 1141291 bytes Desc: not available URL: http://mail.okiebenz.com/pipermail/mercedes_okiebenz.com/attachments/20110314/26de7a20/attachment.jpg ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] replacing valve stem seals in '85 300TD
Sorry if I am a bit late coming into this conversation but... I never heard of anyone doing this job on a Mercedes diesel - just on the W107 V8 models, e.g 1978 450 SL C. What are the symptoms you hope to cure with this repair and how do you know it will work? on the W107s it just buys some time on the inevitable need for a valve job. On Mon, Mar 14, 2011 at 10:01 PM, Dan Penoff lwb...@yahoo.com wrote: I may be off base here, but my recollection of this job does not require removal of the cam, just the cam followers. You use a valve spring compressor for removal of the followers, after which you can easily remove the valve springs and keepers. Dan Sent from my iPod On Mar 14, 2011, at 2:45 PM, glenn brown g_010...@hotmail.com wrote: For those of you who may have done this job before, the MB workshop engine manual indicates in step 1 of job 05-270 to Remove rocker arms with rocker arm brackets (05-235). Other than what I consider to be the nightmare scenario of disconnecting the cam, tying down the timing chain to the sprocket, etc., I don't see an easy way to remove the rocker arms and brackets. Any clues other than the nightmare scenario? Also, do the rocker arm brackets just sit on top of the block or are there studs on the bottom of the rocker arm brackets which extend/lock into the head? TIA. G. M. Brown Brevard, NC -- next part -- A non-text attachment was scrubbed... Name: removing rocker arms brackets Q 031411.jpg Type: image/jpeg Size: 1141291 bytes Desc: not available URL: http://mail.okiebenz.com/pipermail/mercedes_okiebenz.com/attachments/20110314/26de7a20/attachment.jpg ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] replacing valve stem seals in '85 300TD
I have done this job and it is straight forward, just remove the rocker arms rotate the cylinder you are working on to TDC and then remove the two nuts, retainer cap, spring and replace the valve stem. Great chance to replace the roto caps (top nut). The important thing here is to make DAMN sure you are at TDC on that cylinder. I did this by pushing down on the valve spring (valve dully assempled) with a wooden handle (per FSM I think). It is clearly evident when the cylinder is and is not at TDC. Even then I kept a plastic edge against the valve when taking off the nuts and the plate on top. Once that is done, put the nut back on and then let the valve down until it rests on the piston. Then remove the spring. If the valve falls in the piston then the head has to come off. Another thing, while the valves are loose you can slide them up and down, they should be smooth. Once of mine was biting a bit, 1yr later I have a sticking valve. -Rolf On 03/15/2011 09:22 AM, andrew strasfogel wrote: Sorry if I am a bit late coming into this conversation but... I never heard of anyone doing this job on a Mercedes diesel - just on the W107 V8 models, e.g 1978 450 SL C. What are the symptoms you hope to cure with this repair and how do you know it will work? on the W107s it just buys some time on the inevitable need for a valve job. On Mon, Mar 14, 2011 at 10:01 PM, Dan Penofflwb...@yahoo.com wrote: I may be off base here, but my recollection of this job does not require removal of the cam, just the cam followers. You use a valve spring compressor for removal of the followers, after which you can easily remove the valve springs and keepers. Dan Sent from my iPod On Mar 14, 2011, at 2:45 PM, glenn browng_010...@hotmail.com wrote: For those of you who may have done this job before, the MB workshop engine manual indicates in step 1 of job 05-270 to Remove rocker arms with rocker arm brackets (05-235). Other than what I consider to be the nightmare scenario of disconnecting the cam, tying down the timing chain to the sprocket, etc., I don't see an easy way to remove the rocker arms and brackets. Any clues other than the nightmare scenario? Also, do the rocker arm brackets just sit on top of the block or are there studs on the bottom of the rocker arm brackets which extend/lock into the head? TIA. G. M. Brown Brevard, NC -- next part -- A non-text attachment was scrubbed... Name: removing rocker arms brackets Q 031411.jpg Type: image/jpeg Size: 1141291 bytes Desc: not available URL: http://mail.okiebenz.com/pipermail/mercedes_okiebenz.com/attachments/20110314/26de7a20/attachment.jpg ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] replacing valve stem seals in '85 300TD
It's statements like this that discourage me from trying this job on my own: Then remove the spring. If the valve falls in the piston then the head has to come off. On Tue, Mar 15, 2011 at 3:30 PM, Rolf r...@winmutt.com wrote: I have done this job and it is straight forward, just remove the rocker arms rotate the cylinder you are working on to TDC and then remove the two nuts, retainer cap, spring and replace the valve stem. Great chance to replace the roto caps (top nut). The important thing here is to make DAMN sure you are at TDC on that cylinder. I did this by pushing down on the valve spring (valve dully assempled) with a wooden handle (per FSM I think). It is clearly evident when the cylinder is and is not at TDC. Even then I kept a plastic edge against the valve when taking off the nuts and the plate on top. Once that is done, put the nut back on and then let the valve down until it rests on the piston. Then remove the spring. If the valve falls in the piston then the head has to come off. Another thing, while the valves are loose you can slide them up and down, they should be smooth. Once of mine was biting a bit, 1yr later I have a sticking valve. -Rolf On 03/15/2011 09:22 AM, andrew strasfogel wrote: Sorry if I am a bit late coming into this conversation but... I never heard of anyone doing this job on a Mercedes diesel - just on the W107 V8 models, e.g 1978 450 SL C. What are the symptoms you hope to cure with this repair and how do you know it will work? on the W107s it just buys some time on the inevitable need for a valve job. On Mon, Mar 14, 2011 at 10:01 PM, Dan Penofflwb...@yahoo.com wrote: I may be off base here, but my recollection of this job does not require removal of the cam, just the cam followers. You use a valve spring compressor for removal of the followers, after which you can easily remove the valve springs and keepers. Dan Sent from my iPod On Mar 14, 2011, at 2:45 PM, glenn browng_010...@hotmail.com wrote: For those of you who may have done this job before, the MB workshop engine manual indicates in step 1 of job 05-270 to Remove rocker arms with rocker arm brackets (05-235). Other than what I consider to be the nightmare scenario of disconnecting the cam, tying down the timing chain to the sprocket, etc., I don't see an easy way to remove the rocker arms and brackets. Any clues other than the nightmare scenario? Also, do the rocker arm brackets just sit on top of the block or are there studs on the bottom of the rocker arm brackets which extend/lock into the head? TIA. G. M. Brown Brevard, NC -- next part -- A non-text attachment was scrubbed... Name: removing rocker arms brackets Q 031411.jpg Type: image/jpeg Size: 1141291 bytes Desc: not available URL: http://mail.okiebenz.com/pipermail/mercedes_okiebenz.com/attachments/20110314/26de7a20/attachment.jpg ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
[MBZ] replacing valve stem seals in '85 300TD
For those of you who may have done this job before, the MB workshop engine manual indicates in step 1 of job 05-270 to Remove rocker arms with rocker arm brackets (05-235). Other than what I consider to be the nightmare scenario of disconnecting the cam, tying down the timing chain to the sprocket, etc., I don't see an easy way to remove the rocker arms and brackets. Any clues other than the nightmare scenario? Also, do the rocker arm brackets just sit on top of the block or are there studs on the bottom of the rocker arm brackets which extend/lock into the head? TIA. G. M. Brown Brevard, NC -- next part -- A non-text attachment was scrubbed... Name: removing rocker arms brackets Q 031411.jpg Type: image/jpeg Size: 1141291 bytes Desc: not available URL: http://mail.okiebenz.com/pipermail/mercedes_okiebenz.com/attachments/20110314/26de7a20/attachment.jpg ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] replacing valve stem seals in '85 300TD
There is a point in the rotation of the engine where ALL the followers are loose (on a 5 cylinder, one point for the front set and one for the rear). Unbolt and the carriers come off the shallow locator and slide out sideways. You do not need to remove the cam. Looks impossible, but it works. Peter ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] replacing valve stem seals in '85 300TD
I may be off base here, but my recollection of this job does not require removal of the cam, just the cam followers. You use a valve spring compressor for removal of the followers, after which you can easily remove the valve springs and keepers. Dan Sent from my iPod On Mar 14, 2011, at 2:45 PM, glenn brown g_010...@hotmail.com wrote: For those of you who may have done this job before, the MB workshop engine manual indicates in step 1 of job 05-270 to Remove rocker arms with rocker arm brackets (05-235). Other than what I consider to be the nightmare scenario of disconnecting the cam, tying down the timing chain to the sprocket, etc., I don't see an easy way to remove the rocker arms and brackets. Any clues other than the nightmare scenario? Also, do the rocker arm brackets just sit on top of the block or are there studs on the bottom of the rocker arm brackets which extend/lock into the head? TIA. G. M. Brown Brevard, NC -- next part -- A non-text attachment was scrubbed... Name: removing rocker arms brackets Q 031411.jpg Type: image/jpeg Size: 1141291 bytes Desc: not available URL: http://mail.okiebenz.com/pipermail/mercedes_okiebenz.com/attachments/20110314/26de7a20/attachment.jpg ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
