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Old 04-05-2006, 04:11 PM
Registered User
Join Date: Sep 2005
Posts: 74
1986 MB 560sl


I have a 1986 MB 560sl with 120.000 miles. I dont know the service history. I am planning to do a major tune up on engine since the labor is very cheap in my country. I am using about a quart of oil every 1000 miles. I also have a ticking noise on the righ head side on cold start ups. I have all the new parts ready chain, upper rails, tensioner, plastic cam lubes, valve stem seals,hydraulic lifters, valve cover gaskets, intake manifold and head gaskets, exhaust and oil pan gaskets, injector seals, sparks.

I will change the chain stuff and valve cover seals and sparks for sure, Also I will change the engine mounts and front subframe mounts.

1. Do I have to take head off in order to the valve steam seals?

Any other suggestion while the mechanic is doing this? As mentioned above I have many new parts I am just not sure what alse should be done to be on the safe side for a long period and use the opportunity of cheap labor and mechanic allready doing a huge job.

Thank you all in advance for any input.

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Old 04-05-2006, 05:30 PM
Registered User
Join Date: Dec 2003
Location: tampa
Posts: 255
No you don't

It can be done at least a couple of ways with the heads on. The subject has been covered here many times. Do a search on "valve stem seals" and you will get lots of info.

Good luck.

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Old 04-05-2006, 08:29 PM
Super Moderator
Join Date: Apr 2000
Location: Falls Church, VA
Posts: 5,316
If you are going to pull the heads, get the valve guides replaced, which basically means a head rebuild.

Replace the the o-rings that go between the injector jackets and the head.

Replace the short piece of hose between the intake manifold and the thermostat housing.

Make sure your mechanic has the measuring tool to use when replacing the hydraulic lash adjusters (aka ball studs, lifters). And that he knows how to use it. Do a search on "ball stud" for too much information.

Replace the crush washers on the bolts that hold the valve covers on and make sure that your mechanic has a 1/4' torque wrench to tighten the bolts with.

You understand that you have to lift the engine or drop the front subframe to change the oil pan gaskets? Best is to drop the subframe and do the subframe mounts at the same time.
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe
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