Hi Luther,
One thing about the torque sequence - typically, it's best to start in the
middle and work towards the outside.. Hmmm... I'm havng trouble finding a
way to dcscribe it...
if the cam cover looks like this - with the #s being bolts --
1 - 2 - 3 - 4 - 5 - 6
7 - 8 - 9 - 10-11-12
1st,
Both the removal and tightening sequence of a camshaft on a 603 is
determined by the lobes that have pressure on them at TDC - i.e. open
valves. The crankshaft and camshaft markings must both be at TDC. When
I say sequence, I mean the order in which you start tightening (or
removing) the bolts as
! youroil.net
Weber Carb Info http://members.rennlist.com/webercarbs
.
- Original Message -
From: dave walton [EMAIL PROTECTED]
To: Mercedes Discussion List mercedes@okiebenz.com
Sent: Sunday, August 12, 2007 7:50 AM
Subject: Re: [MBZ] OM603 camshaft installation
Both the removal
://members.rennlist.com/webercarbs
.
- Original Message -
From: dave walton [EMAIL PROTECTED]
To: Mercedes Discussion List mercedes@okiebenz.com
Sent: Sunday, August 12, 2007 7:50 AM
Subject: Re: [MBZ] OM603 camshaft installation
Both the removal and tightening sequence of a camshaft on a 603
: [MBZ] OM603 camshaft installation
Both the removal and tightening sequence of a camshaft on a 603 is
determined by the lobes that have pressure on them at TDC - i.e. open
valves. The crankshaft and camshaft markings must both be at TDC. When
I say sequence, I mean the order in which you start
List mercedes@okiebenz.com
Sent: Friday, August 10, 2007 1:55 PM
Subject: Re: [MBZ] OM603 camshaft installation-success!
I was attempting to turn the engine over by the crank with a 27mm socket
and ratchet. Make any difference? :)
Luther
On Fri, 10 Aug 2007 11:29:33 -0500, Tom Hargrave [EMAIL
He replaced the head. Cam bearings are two bolts, and must be walked
down one turn at a time on the four or five bearing caps specified in
the shop manual to avoid warping or binding the cam.
Peter
___
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For new parts see official
complete revolutions without coming to a hard stop?
Thanks, Tom
256-656-1924
-Original Message-
From: Luther [EMAIL PROTECTED]
To: Mercedes Discussion List mercedes@okiebenz.com
Sent: 8/10/07 6:47 PM
Subject: Re: [MBZ] OM603 camshaft installation-success!
Sure, but it's how I set the valves
.
Tom
www.kegkits.com
Original Message
From: Tom Hargrave [EMAIL PROTECTED]
Sent: 08/11/07 12:25 PM
To: Luther [EMAIL PROTECTED] ; Mercedes Discussion List
mercedes@okiebenz.com
Subject: Re: [MBZ] OM603 camshaft installation-success!
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
It should take some effort
RR of the cracked head. I installed the bearing caps in the exact order they
were removed, they are numbered 1-7. Thank goodness :D Bearing caps 2,3,4, and
7 were installed 1 turn per bolt at a time. I'm thinking that the mechanical
interference is not enough lube/metal on metal. That's why
Chain guide go in OK between cam sprocket and injection timer? As I
remember, it's possible to get that one in upsidedown, in which case
the chain won't move.
I could turn mine fairly easily with a 1/2 drive standard length
ratchet.
Peter
___
Chain guide was never removed, always stayed on the chain.
Luther
On Sat, 11 Aug 2007 15:10:59 -0500, Peter Frederick [EMAIL PROTECTED] wrote:
Chain guide go in OK between cam sprocket and injection timer? As I
remember, it's possible to get that one in upsidedown, in which case
the chain
Does it rotate at all?
Peter
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Plan's been revised. The cam is coming back off and getting cleaned of all its
Mobil 1, clean the head areas, then re-assemble with assembly lube. I tried to
turn the engine over by hand, and couldn't. I might get back into it tomorrow
morning after work. For now, I'm relaxing and sleeping
Original Message
From: Luther [EMAIL PROTECTED]
Sent: 08/10/07 11:11 AM
To: Mercedes Discussion List mercedes@okiebenz.com
Subject: Re: [MBZ] OM603 camshaft installation-success!
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Plan's been revised. The cam is coming back off and getting cleaned of
all its Mobil 1
To: Mercedes Discussion List mercedes@okiebenz.com
Subject: Re: [MBZ] OM603 camshaft installation-success!
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Plan's been revised. The cam is coming back off and getting cleaned of
all its Mobil 1, clean the head areas, then re-assemble with assembly
lube. I
PROTECTED]
Sent: 08/10/07 11:11 AM
To: Mercedes Discussion List mercedes@okiebenz.com
Subject: Re: [MBZ] OM603 camshaft installation-success!
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Plan's been revised. The cam is coming back off and getting cleaned
of
all its Mobil 1, clean the head areas
Discussion List mercedes@okiebenz.com
Subject: Re: [MBZ] OM603 camshaft installation-success!
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Plan's been revised. The cam is coming back off and getting cleaned of
all its Mobil 1, clean the head areas, then re-assemble with assembly
lube. I tried to turn the engine
Discussion List' mercedes@okiebenz.com
Sent: Thursday, August 09, 2007 7:46 PM
Subject: Re: [MBZ] OM603 camshaft installation-success!
Oil is fine as long as you are sure that you have a good coating during
assembly. The risk with oil is that so much may run or drip off that
that
you don't
are dragging quite a bit around when you
are turning the crack and it's not easy to move.
Thanks, Tom
256-656-1924
-Original Message-
From: dave walton [EMAIL PROTECTED]
To: Mercedes Discussion List mercedes@okiebenz.com
Sent: 8/10/07 2:30 PM
Subject: Re: [MBZ] OM603 camshaft
Should be fairly easy to rotate a 603 -- if quite stuck, something is
very wrong. I would remove the cam and make sure you have #1 on TDC.
Check the installation, too -- if you got it sorta cocked, it may not
turn because it's bound.
It's not hard to turn the cam with a large screwdriver
and it's not easy to move.
Thanks, Tom
256-656-1924
-Original Message-
From: dave walton [EMAIL PROTECTED]
To: Mercedes Discussion List mercedes@okiebenz.com
Sent: 8/10/07 2:30 PM
Subject: Re: [MBZ] OM603 camshaft installation-success!
I just checked - it's a 27mm.
Turning
Are you tightening everything down before fastening the cam gear (you should
be)?
If so then no problem, just get everything tight then move the cam around
to TDC.
What's going on is the pressure from the lifters on the cam lobes are moving
the cam around.
Thanks,
Tom Hargrave
www.kegkits.com
How do you move the camshaft around? I tried that the first time I tightened
it down, and couldn't budge it. ?
Luther
On Thu, 09 Aug 2007 12:52:22 -0500, Tom Hargrave [EMAIL PROTECTED] wrote:
Are you tightening everything down before fastening the cam gear (you should
be)?
If so then no
If you can't turn the cam in the head with everything bolted down, you have
a problem - if you can't turn it, how do you expect the timing chain to?
Did you have a machinist bless the head, or at least take it out of a car you
saw running?
On Thu, Aug 09, 2007 at 12:57:02PM -0500, Luther wrote:
Remove the vacuum pump. It's return spring is what keeps the timing
chain from moving freely. The cam gear is keyed to the cam as I
recall. You might be off by a tooth.
-Dave Walton
On 8/9/07, Luther [EMAIL PROTECTED] wrote:
Anyone have experience installing camshafts? I can't keep mine at TDC
Once everything is together - timing chain in place over camshaft -
the timing mark on the camshaft should line up with the crankshaft at
TDC. The timing mark is on the camshaft, not the gear. You can then
rotate the engine with a socket on the crankshaft. There will be a
noticeable and dangerous
I'm sure I wasn't off by a tooth since I had lightly scribed marks on the cam
sprocket and chain right at TDC.
Tom's suggestion of using the cam sprocket to move the camshaft worked. Cam is
on and I can continue on with the reassembly. Thanks for the help.
Luther
On Thu, 09 Aug 2007 13:15:21
: Thursday, August 09, 2007 2:39 PM
Subject: Re: [MBZ] OM603 camshaft installation-success!
I'm sure I wasn't off by a tooth since I had lightly scribed marks on the
cam sprocket and chain right at TDC.
Tom's suggestion of using the cam sprocket to move the camshaft worked.
Cam is on and I
Is Mobile 1 good enough?
On Thu, 09 Aug 2007 15:30:31 -0500, LarryT [EMAIL PROTECTED] wrote:
Not sure what is keeping the cam from lining up - never had a problem but
one thing is *critical* -- lubrication to the cam bearings! You *must* coat
the bearings with a startup lube to prevent
I've always used assembly grease. I like this blood-red stuff I got from
NAPA. Sticks around long enough for oil to coat things nicely.
On 8/9/07, Luther [EMAIL PROTECTED] wrote:
Is Mobile 1 good enough?
Casey
__
'87 300TD
] OM603 camshaft installation-success!
I've always used assembly grease. I like this blood-red stuff I got from
NAPA. Sticks around long enough for oil to coat things nicely.
On 8/9/07, Luther [EMAIL PROTECTED] wrote:
Is Mobile 1 good enough?
Casey
On the 4 cylinders, a piston hits tdc every 180 degrees of crank
rotation. On the cam, since it turns at 1/2 the crank speed, an
intake (or exhaust) valve opens every 90 degrees. When the cam is
not restrained by the timing chain, it will rotate to a position
between the lobes. What I found
]
To: 'Mercedes Discussion List' mercedes@okiebenz.com
Sent: Thursday, August 09, 2007 7:46 PM
Subject: Re: [MBZ] OM603 camshaft installation-success!
Oil is fine as long as you are sure that you have a good coating during
assembly. The risk with oil is that so much may run or drip off that that
you
' mercedes@okiebenz.com
Sent: Thursday, August 09, 2007 7:46 PM
Subject: Re: [MBZ] OM603 camshaft installation-success!
Oil is fine as long as you are sure that you have a good coating during
assembly. The risk with oil is that so much may run or drip off that that
you don't have a good oil film
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