911mike99

How hard is it to change cam cover gasket? And how much would a shop charge to change? I have a small leak that drips on driver side header pipe and stinks and smoke a little. It only seems to leak when I run the rpm"s up hi. If I drive normal it dosnt seem to leak. Any help? Thanks

Sneaky Pete

Sounds like a spark plug tube o-ring leak. I had one too. Had the dealer take care of it.

Found a similar post for you.....

https://rennlist.com/forums/996-foru...side-rear.html

I don't know how difficult it is for a DIY though.

Good luck!

ivangene

wild a$$ guess, its not the cam cover.... suspect AOS - maybe solenoid ring - spark plug tube - take some pics

ivangene

cover removal requires a tool to hold the cams in place as the race are built into the cover so when you remove it the cam should be held in place (IIRC) - still thinking about that one because there are 2 bearings that are clamps not tied to the cover

911mike99

I can drive normal all day and no drip. But when I run it hard thats when I seem to get a drip on the header. No drips at all on garage floor. Seems like when rpms are up it pushes it out some where. I thought it might be cam covers. But not sure.

Barn996

I don't know the answer, buynyour SY Aero is beautiful.

911mike99

What would a dealer charge to fix a spark plug o-ring fix?

ivangene

tubes are $15/ea
labor - a couple hours (guess)

whats involved, remove muffler (10 minuts if its been done before 30+ if not) remove coilpacks (quick job) remove plug and tibe (can be a PITA) add how many need replacing plus how many cracked coild found at $XXX /ea and you will be $500-1000 (wild guess)

now if its an AOS you are looking at 4-6 hours shop rate plus $150-200 in parts

solenoid seal is a 15 min job and they cost $25/ea

if this only happens on hard running I am still guessing AOS


edit - how full do you run the oil level?

Sneaky Pete

It was around $125 this past fall. I knew I had the leak when I had my PPI done but it was very minor. It eventually started a drip on the floor and it was time to fix it.

911mike99

I fill almost 9 Qrts of 0w40 M-1 What does AOS stand for?

rb101

AOS - Air Oil Separator. Where is the leak hitting the headers, closest to flywheel side or belt side?

Rick
99 996C4
87 944S

911mike99

Driver side back close to the bumper and it burns off header it never drips to the ground

fpb111

It is probably not the AOS that far back. Are you sure it is oil, not antifreeze? Have you had to add any water to the tank? Cracks in the expansion tank are not unusal. And that is where it drips when it starts to leak.

ivangene

+1 for not AOS if its near rear bumper... back to a coolant or oil question

15psi

Sounds like the spark plug tubes. Low-Med difficulty for DIY. Replace plugs at same time. The tubes are ~$5 each, but if you careful they will probably be fine. All tubes on mine were fine @ 101k, but seals were stating to leak. The seals are about $2ea, you need 6 of ea. (inner/outer)