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Replacing a Valve Cover Gasket


 
Well next in my do it yourself series is replacing a valve cover gasket. This one is pretty straight forward, and cheap too.
 
This is all you should need, (This is for you Loaf!):
- 7/16" Socket Deep Well 1/4 Drive
- 7/16" Wrench
- 1/4" Rachet
- 1/4" Extension
- Metal Putty Knife
- Screw Driver
- Hammer
- Brake Cleaner
- Shop Towels/Rags
- Valve Cover Gasket
- Silicone
 
Jeep Valve Cover Gasket Replacement
 
First step is to disconnect both CCV hoses:
 
Disconnect CCV PCV Hoses
 
When unbolting the valve cover, it doesn't matter which order you take the bolts out in, I'd start with the studs that have nuts on top of them. Remove all the bolts and studs from the valve cover.
 
Remove all the bolts order does not matter
 
Don't worry if the nuts and studs stay together while taking them out, you can seperate them later.
 
After you've double and triple checked that you've removed all the bolts time to lift the valve cover off. Try lifting it off first. If it won't budge, tap a flat head screw driver between the valve cover and the head and then gently pry the valve cover up:
 
Remove cover
 
The valve cover doesn't exactly just lift right off, without taking other things off. You sort of have to work it back and forth and lift it up at a slight angle to get it out. Its sort of a puzzle.
 
Once you have the valve cover off, its time to start cleaning it off. Use a putty knife or scrapper to clean off all the old silicone and gasket material.
 
Clean cover
 
Once you have the valve cover scrapped clean, time to do the head. Make sure you scrap towards the outer edge of the head, so none of the old gasket or silicone falls into the motor.
 
Clean cylinder head carefully
 
Now take a clean rag and wipe down the valve cover with brake cleaner. Once you think you have it clean, wipe it down one more time. Then clean the mounting surface on the head too. Again once you think it's clean, wipe it down again. As with many things, surface prep is the key.
 
Take the valve cover gasket out of the box and dry fit it on the valve cover. It only goes one way.
 
Test fit gasket
 
Flip the gasket over onto the box, so you can put silicone on the valve cover side. Spread an even coat over the entire valve cover gasket.
 
Spread a thin layer of silicone on gasket
 
All you really need is a thin layer, less is more.
 
Less is more here
 
Personally after I spread the silicone, I smear it with my finger to make sure the entire gasket it covered.
 
I prefer to spread silicone evenly across gasket with my finger
 
Then set the valve cover gasket on the valve cover.
 
Now it's time to silicone the other side. If this was a performance car that the valve covers came off reguarly for valve adjustments, I'd recommend just silicone the gasket to the valve cover, but not to the head. However this is my Jeep and I don't plan on having the valve cover off again anytime soon, so I'm siliconing the bottom too.
 
Place gasket on valvecover and then repeat
 
Time to the valve cover back on. Carefully set the valve cover back on. Once you have it in place, start the center bolts first. Start with the passenger side center bolt. and just take it down some, not super tight. Then do the driver side center bolt. After this start putting more bolts back in, in a criss cross pattern working your way to the front and rear of the valve cover.
 
Do NOT over tighten botls
 
Notice in that picture I'm just using a 1/4 rachet. This is a valve cover there is no need for it to be super tight. Using a large rachet will pretty much ensure you over tighten the valve cover and have leaks. Once you have all the bolts in, keep working your way around the valve cover, you want the bolts tight to snug, I can't stress this enough these aren't lug nuts, they they don't need to be super tight. You'll notice you need to work your way around the valve cover several times for the bolts to be tight. The goal is to try and tigthen the bolts all to the same point, so it evenly clamps the valve cover down.
 
© Copyright 2006 - 2017 Mike Lee