Is it common for the lnf to leak around the head gasket or valve cover.. I was cleaning my engine bay and noticed there was oil leaking from the right side of the motor, this is the first ive noticed it

 

yes around the high press. fuel pump.

 

yea thats exactly where its leaking from.. how do I fix that.. just replace the gasket or will it keep doing it

 

I got mine fixed at the dealer under bumber to bumber, maybe its covered under 100k powertrain, looks like they just put on a new gasket and some type of silicone sealer.

 

alright thanks.. ill have to get a new one put on then

 

oh there is a whole thread about this, this issue plauged pretty much all lnf engines. i forget what the thread is but alot of guys had to take it apart and fix it themselves cause the way the dealer did it only worked for a bit but maybe they wised up by now. that falls under power train warrenty.

 

but do you think the dealership would try and say that the aftermarket piping has something to do with it

 

they shouldn't, there's a TSB out for this, if you tell them to look it up they should be able to find it. I know its on the site here somewhere, you should find the TSB number so you can take it with you.

 

I can look up the TSB at work tom.. which reminds i think the guy that owned it before me had the head gasket replaced then to

 

not for an oil leak thats a common fail on the LNF.

 

alright well imma have to call the dealership and see what i can get worked out.. thanks guys for the help

 

If they do u have my permission to call them idiots for me. Then tell them to look up the Gm bulletin on it for good measure

 

The issue was actually the cam endplate. The stock seal on the LNF was junk. There's a write-up on how to fix it. It's easy to do yourself if you want to avoid the warranty-*****.

Found it: https://www.cobaltss.net/forums/how-...-leaks-189081/

 

There are 2 leaks that typically occur. Camshaft seals and the high pressure fuel pump. I had both, and since it's been fixed, my oil leaks stopped. I had just the tiniest bit of seepage from the camshaft actuators, which I replaced since I swapped my valve cover, so now it's all buttoned up.

 

FYI, you can lookup TSBs right here on CSS. It's a very nice feature that Internet Brands added.

Bulletin No.: 09-06-01-014