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Old 09-23-2004, 04:19 PM
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Join Date: Jul 2003
Posts: 526
Head removal tips? 1983 380 SL

I will remove the head and try to replace the valve guides on piston # 8 at least. Is their a way to remove the camshaft sprocket to remove the head without removing the timing cover? Leave the chain in place and mark it's postion to the cam.
Thanks, Juan
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Old 09-23-2004, 09:05 PM
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Join Date: Aug 2001
Location: Evansville, Indiana
Posts: 8,150
Two things here to consider:

1): You can just wire the chain to the sprocket, remove the bolt (use a large screwdiver or something similar to keep the sprocket from turning) and slide the sprocket off. Wire it up when you have the head off to keep the chain from getting out of control.

2): This engine did not have the steel inserts for the head bolts installed at the factory. If the threads are seized on the bolts, the thread will come out with the bolt and you will have to install inserts to re-install the head. This requires a special jig to get them at the correct angle, and is rather expensive (jig was $1500 a while back). I'd talk to an independent mechanic familiar with this engine before tackling this job. If he feels you need to have the inserts done, I'd let a shop do the valve job.

you should also consider a chain conversion, too, if you still have the single row chain.

1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!
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Old 09-23-2004, 09:18 PM
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smoke gets in your eyes
Join Date: Jun 2000
Location: SF Bay Area
Posts: 20,653
Valve seals you can replace without pulling the head.

Valve guides require the head to come off. Have you replaced valve guides before? It's not really a follow-the-instructions-in-the-book kind of a job.

95 S420
87 300SDL
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Old 09-23-2004, 10:17 PM
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Join Date: Jul 2003
Posts: 526
Very interesting information, do the bolts on the camshafts have right handed threads, and do they turn the same direction? I think they do turn in the same direction. I hope the bolts do not pull the threads with them.

I took the valve covers off and I saw double chains, that was a good surprise as I was expecting the worst.

I will try to replace the seal and if that doesn't do the job I will tackle the guide on #8 cyl thats fouling up the plug.
Thanks, Juan
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