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E-ZGO 53 HP., 99 E 430 sport, 04 E55 AMG, 2008 Tahoe LTZ Sold Porsche to Brother
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Discussion Starter #1 (Edited)
OK Here is the subject a, 99 E430 sport, M113 V8

I have had a small leak on the left side for years, it would only leak one drop during storage of 3 months.
When I would start the car everything was OK but as it warmed up the oil would burn off on the heat shield. The last time I started it it got much worse, the time has come to change the gasket. In this pic you can see the oil fill tube has evidence of seepage, we will fix that too.

Lifting off the engine cover, right side first.

Then continue to lift the front of the engine cover on the left side. The clips at the rear will turn loose as you lift the cover.

The cover is off and you can see more evidence of seepage around the oil fill tube extension.

This is the left side valve cover that will be removed.

Good idea to protect your fender and paint, I use packing blankets for my comfort.

First step mark your coil wires and coils, cut the ty wrap to free the loom. Swing the coil wires back by the firewall, out of the way.

Remove the plastic clip between the fuel line and vacuum line. It will not be necessary to remove either the fuel line or vacuum line.

Use a T30 to remove the coils, one at a time.
 

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E-ZGO 53 HP., 99 E 430 sport, 04 E55 AMG, 2008 Tahoe LTZ Sold Porsche to Brother
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1,906 Posts
Discussion Starter #2 (Edited)
Once the coil is free from the valve cover, you can use a 17mm open end wrench to pull the spark plug boots off. Be careful you can break a plug, pry the boot off gently. Member Oh Lord has a boot removal tool (for sale) that I am sure works better than a common wrench. That said, if you have changed plugs on an air cooled 911 these boots are first cousins. pita

All the coils removed. Starting to break loose the fasteners.

We are about to remove the valve cover, before we do I vacuum the area around the cover to remove any dirt and debris. You don't want any dirt to get in your engine.

Disconnect the large crankcase vent hose.

disconnect the small crankcase vent hose, it is hard to see, just under the red drop light. Ready to lift off the cover.

Cover off, and every thing looks good. The gasket stuck to the head so the leak is between the gasket and cover.

This is the rocker set for Cyl #8 under the exhaust rocker you can see the place (white spot) where the oil drops burn off on the heat shield.

If you like how clean the valve train is, All I can say is, Mobil 1 0W40 this engine is on its 3rd oil change (oil change @ 10K mi) over 10 years. I also use only BP ultimate (Clear 93) and every mile is documented.

Here is the current mileage

The parts new gasket, Blue RTV
 

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E-ZGO 53 HP., 99 E 430 sport, 04 E55 AMG, 2008 Tahoe LTZ Sold Porsche to Brother
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Discussion Starter #3 (Edited)
Part number

Here is the valve cover back after a visit to the spa, all clean and de-greased.

First item to reseal is the oil fill extension. In the next few pics it will appear that I use a liberal amount of Blue RTV that is not the case. For some reason the blue looks larger in the pics. I always try to use a thin film of blue RTV.

Bead on both parts.

Install filer extension, note no RTV coming out.

Small continuous bead of Blue RTV sealant in the gasket channel.

Bed the gasket in the RTV and wipe any excess off.

Again lay a small continuous bead around the gasket surface. Then smooth it to a thin film no higher than the ribs on the gasket. Ready to reinstall, make sure the old gasket is removed and the sealing surface of the head is clean and oil free.

When installing the cover try to do it in one shot, and avoid sliding it around on the head too much. Start all your fasteners by hand first. Then tighten them in a circular pattern, starting at the center and go around in an ever widening circle. Torque the fasteners in three stages 40-60 then one hour later 72 inch pounds.

Here I am installing a ty wrap to act as a hose clamp on the crankcase hose. They get a little stretched when you remove them.
 

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E-ZGO 53 HP., 99 E 430 sport, 04 E55 AMG, 2008 Tahoe LTZ Sold Porsche to Brother
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Discussion Starter #4 (Edited)
Same ty wrap as hose clamp for the small hose too.

Reinstall the plug boots on the spark plugs and fasten the coil to the valve cover.

Last one.

Replace clip and re tywrap loom to #8 coil and hook up coil wires.

Snap engine cover on and wait 24 hours for sealant to dry, then test run and check for leaks.
 

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The two breather hoses should be replaced when doing this job, no need to zip tie some junk parts back on when new ones can be had for around $20.

Also, for the love of god, RTV sealer is not needed anywhere on this engine that already has a gasket. If you cant repair the leak by using factory repair methods and parts then you should take it to a professional. If you just put a gasket and follow factory repair instructions it will not leak
 

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2001 SLK 320(217K Miles), 2002 E320 Special Edition(183K Miles)
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3,464 Posts
The two breather hoses should be replaced when doing this job, no need to zip tie some junk parts back on when new ones can be had for around $20.

Also, for the love of god, RTV sealer is not needed anywhere on this engine that already has a gasket. If you cant repair the leak by using factory repair methods and parts then you should take it to a professional. If you just put a gasket and follow factory repair instructions it will not leak
Eek - another 'expert'. Next he'll tell us to take the car to the dealer to have the codes scanned for the oil leak. :eek:
 

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1997 E320 Gold Package
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8 Posts
This is beautiful, just wish this was for a 1997 e320 with the inline six. Is there a step by step with picks for my E320?:confused:
 

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2002 E320
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Eek - another 'expert'. Next he'll tell us to take the car to the dealer to have the codes scanned for the oil leak. :eek:
Umm, I think knowbenz is correct. The breather hoses, if original, are very brittle (mine were cracked and broke off). Also, when I told my friend, a long time Mechanic at the San Jose Mercedes dealership about the RTV, he said not one mechanic at his dealership uses anything other than the gasket. I would imagine everybody has their own recipe, though.

This DIY from Yacht Master is fabulous and the pictures alone make it well worth anyone's time to read before starting.
 

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1997 E320
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60 Posts
I also think that RTV isnt needed. The only time I'll ever use a sealant is to hold the gasket to the valve cover if it is held loosely. If the sealing surfaces are in good shape, there's no reason to use RTV on there. You also risk getting chunks of it in the sump and clogging up the oil pump pickup. I've seen motors burn up crank bearings because of this. Also, you should see what happens when you introduce RTV to gasoline.
 

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1998 E320, 2002 C32 AMG
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28 Posts
How'd you get the driver's side cover back on w/ the hoses in the way? I removed mine tonight and had a tough time. I was banging up against the hoses, the camshaft gear, and other under-hood equipment before I finally got it out of the car. I don't see how it can be put on the car in "one shot" as I think you called it.
 

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1999 E320 Black on Black
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162 Posts
It is a bit of a pain, but I was able to pry up on the hoses and such with the backs of my hands to get the cover on without touching the cam. Do a dry run before trying it with the gasket.
 

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No RTV is needed per Star Service DVD.
I've never used it haven't had a leak.
And future gasket replacement is much easier without the mess.
 

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2000 W210 E430T4matic Brillantsilber met.
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120 Posts
I used no RTV too. No leaks. WIS instructions is without RTV.
Its important to clean contact surfaces properly.

I used the dishwasher at work.:thumbsup:
Excellent results!
STD_1274.jpg
 

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1997 E320, 1997 S320
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I used the dishwasher at work.:thumbsup:
Excellent results!
i hope you don't work at a restaurant:D. are those food dishes next to the valve cover?:eek:

i don't think it matters if you use rtv or not. personally i would use it. if it came from factory without rtv and it eventually leaked, then it won't leak now with rtv.
 
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