Re: [MBZ] 117 timing chain stretch
yes, same way as on the diesel except you have to line up 2 cams Tom Savage wrote: Does anyone know how the timing chain stretch is measured on a an M117? This is on a '91 560SEL and I've never been inside one. Marks on the cam tower like an OM617? I've got to pull the covers as the gaskets are letting oil out all over the manifold and figure that at 150k miles, I oughta check the (presumed original) chain as well. Thanks, Tom ___ 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://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.176 / Virus Database: 270.10.1/1869 - Release Date: 12/30/2008 12:06 PM -- Kaleb C. Striplin/Claremore, OK 92 300SD, 92 300E 4Matic, 91 300D, 91 300E, 89 560SEL, 89 300E, 87 300SDL x2, 85 380SE 5.0 Euro, 85 190D, 84 190D x2, 84 300D euro manny, 81 240D, 80 240D, 76 240D, 76 300D, http://www.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://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 117 timing chain stretch
Are there marks on a M103 engine that aid when reinstalling the head after a valve job, or is there some magic trick and tool to get everything lined up again when reassembling? It's not apart yet, but it's on the to do list over the next few months. Ed 300E 2008/12/31 OK Don okd...@gmail.com Yes - the mark is on the left bank - as you're facing the engine, the car's right side. On Tue, Dec 30, 2008 at 10:11 PM, Tom Savage tesav...@gmail.com wrote: Does anyone know how the timing chain stretch is measured on a an M117? This is on a '91 560SEL and I've never been inside one. Marks on the cam tower like an OM617? I've got to pull the covers as the gaskets are letting oil out all over the manifold and figure that at 150k miles, I oughta check the (presumed original) chain as well. Thanks, Tom -- OK Don ___ 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://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com -- next part -- An HTML attachment was scrubbed... URL: http://okiebenz.com/pipermail/mercedes_okiebenz.com/attachments/20081231/5c35a504/attachment.html ___ 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://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 117 timing chain stretch
Conventional wisdom dictates that in the 117 motor the guide rails will break before the chain wears out. I believe the oiling of the chain in the 117 is superior to that of the 4 and six cylindered cousins. Chain tensioner should also be checked and replaced. Another way is to see how far the tensioning device has gone but that is not a very scientific way of doing it and unless you have a comparative reference (such as how far the tensioner moved on a new chain) but if you pull it out and it is just about at the end of it's travel you can bet your boots that the chain is tired. Hendrik Mathieu J. Cama wrote: [MBZ] 117 timing chain stretch Tom Savage Tue, 30 Dec 2008 20:12:28 -0800 Does anyone know how the timing chain stretch is measured on a an M117? This is on a '91 560SEL and I've never been inside one. Marks on the cam tower like an OM617? I've got to pull the covers as the gaskets are letting oil out all over the manifold and figure that at 150k miles, I oughta check the (presumed original) chain as well. Thanks, Tom Tom, Very similar to the om617 in concept and methodology. I like to set the passenger cam to TDC and measure the stretch on the harmonic. If you have no proof the chain has been done, make it simple for yourself: new chain, tensioner, and all upper guide rails. Cheap insurance in light of an m117 jumping time. It is the guide rails that generally fail. Also, inspect the sprockets well. These are often worn if the car has seen lackluster maintenance or thin oil. Of course, for a job like this, genuine MB parts are best. If the upper rails are rather dark, replace the tensioner guide rail as well, but, at least, ensure you inspect it well. It does like to exhibit grooves into the plastic sheathing and will become brittle, too, with age. If you are doing all of that, consider a water pump and possibly even a front main seal. Given the age and mileage, all of these will be due sooner than later. Couple it all together, makes your life simpler in the long run and makes for less financial expenditure for the customer, too, in the long run. FYI, to time this motor correctly, you really need to use a dial indicator as indicated in the manuals. Remember to inspect the passenger cam lobes for wear. Run that motor 2 quarts low on oil and chances are strong that cam will be damaged. It does not take long to wear a lobe down once the hardening has been compromised. Lastly, look carefully at the headgaskets at the rear and sides of the motor. These motors are famous for leaking there. You can attempt to re-torque the heads, but it is not a risk I would recommend taking without a signed waiver. Have fun, those are great motors and a real joy when correct. The home and Japanese market and ECE variant will knock your socks off with a true 300hp DIN (117.968, iirc). Mathieu ___ 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://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 117 timing chain stretch
Some people remove part of one rail, the one that breaks off when the chain slaps and falls in, breaking the chain. Older engines with metal and rubber guides should not have them replaced unless totally kaput -- they are vastly better than the plastic ones. Peter On Dec 31, 2008, at 8:42 PM, Hendrik Fay wrote: Conventional wisdom dictates that in the 117 motor the guide rails will break before the chain wears out. I believe the oiling of the chain in the 117 is superior to that of the 4 and six cylindered cousins. Chain tensioner should also be checked and replaced. Another way is to see how far the tensioning device has gone but that is not a very scientific way of doing it and unless you have a comparative reference (such as how far the tensioner moved on a new chain) but if you pull it out and it is just about at the end of it's travel you can bet your boots that the chain is tired. Hendrik Mathieu J. Cama wrote: [MBZ] 117 timing chain stretch Tom Savage Tue, 30 Dec 2008 20:12:28 -0800 Does anyone know how the timing chain stretch is measured on a an M117? This is on a '91 560SEL and I've never been inside one. Marks on the cam tower like an OM617? I've got to pull the covers as the gaskets are letting oil out all over the manifold and figure that at 150k miles, I oughta check the (presumed original) chain as well. Thanks, Tom Tom, Very similar to the om617 in concept and methodology. I like to set the passenger cam to TDC and measure the stretch on the harmonic. If you have no proof the chain has been done, make it simple for yourself: new chain, tensioner, and all upper guide rails. Cheap insurance in light of an m117 jumping time. It is the guide rails that generally fail. Also, inspect the sprockets well. These are often worn if the car has seen lackluster maintenance or thin oil. Of course, for a job like this, genuine MB parts are best. If the upper rails are rather dark, replace the tensioner guide rail as well, but, at least, ensure you inspect it well. It does like to exhibit grooves into the plastic sheathing and will become brittle, too, with age. If you are doing all of that, consider a water pump and possibly even a front main seal. Given the age and mileage, all of these will be due sooner than later. Couple it all together, makes your life simpler in the long run and makes for less financial expenditure for the customer, too, in the long run. FYI, to time this motor correctly, you really need to use a dial indicator as indicated in the manuals. Remember to inspect the passenger cam lobes for wear. Run that motor 2 quarts low on oil and chances are strong that cam will be damaged. It does not take long to wear a lobe down once the hardening has been compromised. Lastly, look carefully at the headgaskets at the rear and sides of the motor. These motors are famous for leaking there. You can attempt to re-torque the heads, but it is not a risk I would recommend taking without a signed waiver. Have fun, those are great motors and a real joy when correct. The home and Japanese market and ECE variant will knock your socks off with a true 300hp DIN (117.968, iirc). Mathieu ___ 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://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://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
[MBZ] 117 timing chain stretch
Does anyone know how the timing chain stretch is measured on a an M117? This is on a '91 560SEL and I've never been inside one. Marks on the cam tower like an OM617? I've got to pull the covers as the gaskets are letting oil out all over the manifold and figure that at 150k miles, I oughta check the (presumed original) chain as well. Thanks, Tom ___ 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://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
[MBZ] 117 timing chain stretch
[MBZ] 117 timing chain stretch Tom Savage Tue, 30 Dec 2008 20:12:28 -0800 Does anyone know how the timing chain stretch is measured on a an M117? This is on a '91 560SEL and I've never been inside one. Marks on the cam tower like an OM617? I've got to pull the covers as the gaskets are letting oil out all over the manifold and figure that at 150k miles, I oughta check the (presumed original) chain as well. Thanks, Tom Tom, Very similar to the om617 in concept and methodology. I like to set the passenger cam to TDC and measure the stretch on the harmonic. If you have no proof the chain has been done, make it simple for yourself: new chain, tensioner, and all upper guide rails. Cheap insurance in light of an m117 jumping time. It is the guide rails that generally fail. Also, inspect the sprockets well. These are often worn if the car has seen lackluster maintenance or thin oil. Of course, for a job like this, genuine MB parts are best. If the upper rails are rather dark, replace the tensioner guide rail as well, but, at least, ensure you inspect it well. It does like to exhibit grooves into the plastic sheathing and will become brittle, too, with age. If you are doing all of that, consider a water pump and possibly even a front main seal. Given the age and mileage, all of these will be due sooner than later. Couple it all together, makes your life simpler in the long run and makes for less financial expenditure for the customer, too, in the long run. FYI, to time this motor correctly, you really need to use a dial indicator as indicated in the manuals. Remember to inspect the passenger cam lobes for wear. Run that motor 2 quarts low on oil and chances are strong that cam will be damaged. It does not take long to wear a lobe down once the hardening has been compromised. Lastly, look carefully at the headgaskets at the rear and sides of the motor. These motors are famous for leaking there. You can attempt to re-torque the heads, but it is not a risk I would recommend taking without a signed waiver. Have fun, those are great motors and a real joy when correct. The home and Japanese market and ECE variant will knock your socks off with a true 300hp DIN (117.968, iirc). Mathieu Happy New Year, ya'll ___ 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://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 117 timing chain stretch
Yes - the mark is on the left bank - as you're facing the engine, the car's right side. On Tue, Dec 30, 2008 at 10:11 PM, Tom Savage tesav...@gmail.com wrote: Does anyone know how the timing chain stretch is measured on a an M117? This is on a '91 560SEL and I've never been inside one. Marks on the cam tower like an OM617? I've got to pull the covers as the gaskets are letting oil out all over the manifold and figure that at 150k miles, I oughta check the (presumed original) chain as well. Thanks, Tom -- OK Don ___ 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://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
