Hi all, my '05 GXP is leaking oil from somewhere. I was under it today changing out my Front Impact Sensor, (pain in the ass) but got that done successfully.
Any common places you can suggest where oil leaks are prone to occur on this car?
I was only down about 1 quart, just topped it off, will do an oil change next week I think.
I've actually smelled it occasionally, opened the hood when I got home after a drive a couple weeks ago, but did not see anything up on top. Now that I've been under it you see a lot of oil on the Pan, and other areas. I looked at the drain plug, might be the culprit, (Is there a Gasket on there)? I have not done an oil change on this ride yet, so I dont know.
Oil pan looks to be in perfect shape physically, suppose I could carefully torque the bolts on it.
Any suggestions?
Thanks
Hef
Oil Leaks?
Re: Oil Leaks?
Sorry for posting that without doing the standard search first. Looks like an extremely common problem around here. Valve Cover, Oil Cooler Lines, lots to choose from.
I bought this car in August 2016, had a mechanic check it before I bought it. Said the oil looked clean, and that they had probably detailed the car engine area before selling it. Looked very clean.
I checked the oil a couple months ago, but have not changed it yet. So from August to today in March I lost about a quart through leakage and possible burning. Not too bad, as that fits into a standard oil change schedule.
(Excuse me while I try to justify that this really isn't so bad
I'll get under there in a week or two to change the oil and see what I can see.
Thanks
Hef
I bought this car in August 2016, had a mechanic check it before I bought it. Said the oil looked clean, and that they had probably detailed the car engine area before selling it. Looked very clean.
I checked the oil a couple months ago, but have not changed it yet. So from August to today in March I lost about a quart through leakage and possible burning. Not too bad, as that fits into a standard oil change schedule.
(Excuse me while I try to justify that this really isn't so bad
I'll get under there in a week or two to change the oil and see what I can see.
Thanks
Hef
- CMNTMXR57
- Certified Bonneville Nut

- Posts: 5841
- Joined: Wed May 13, 2009 10:45 pm
- Year and Trim: 2006 STS-V, 2004 GTO, 2009 G8 GT
- Location: CHICAGO
Re: Oil Leaks?
Yup, I was about to say "search".
Cam Cover gaskets, oil cooler lines.
Cam Cover gaskets, oil cooler lines.

Retired Bonneville Owner and former GM Tech:
2004 Pontiac Bonneville GXP: Black/Ebony *SOLD*
Summer Toys: Combined 827 RWHP / 877lb/ft RWTQ
2004 Pontiac GTO: Impulse Blue Metallic/Black/M6: lots 'o mods, 415 RWHP / 405lb/ft RWTQ!
2006 Cadillac STS-V: Light Platinum Metallic/Light Gray/A6 - Spectre CAI, Magnaflow exhaust, Speed Inc. tune, 412 RWHP / 472lb/ft RWTQ
Daily Drivers:
2019 Chrysler Pacifica Limited: Mommy's new RGC
2015 Chrysler Town & Country Limited Platinum: Kids new RGC
2011 Camaro SS
2009 Pontiac G8 GT: L76, Sport Red Metallic
2004 GMC Sierra 2500HD: Victory Red - 8.1L Big Block and Allison
2003 Chevrolet Suburban 2500: Doeskin Tan - 8.1L Big Block... RIP
1999 Chevrolet Suburban: Sunset Gold Metallic - RIP


