Need some help!
Thread Starter
Late Model Domestics
Joined: Oct 2007
Posts: 1,548
Likes: 46
From: Virginia Beach VA
Need some help!
Well my car was leaking oil. I took it to the dealership and they did their dye test and told me it was the rear main seal and lower pan gasket.
I had a new clutch installed and while they where in there had them replace the rear main seal and lower pan gasket.
Well I look on my floor and oil. Lost about a 1/4 qt in a 1500 miles so its not to bad so where else could it be coming from.
I looked under the car and its not coming from the filter or filter plug. It is towards the rear of pan looks like its collecting on the 2 bolts there but coming from some where else. I looked up but didnt see any visual drips i also started it and let it run for a few minutes but it didnt drip or spray while idling.
I just wanna know where i can look and i know this vague but before i go to the dealer and drop $100 for the dye test again would like some feedback!
I also searched like a 100 threads so please help if you can@!
Mario
I had a new clutch installed and while they where in there had them replace the rear main seal and lower pan gasket.
Well I look on my floor and oil. Lost about a 1/4 qt in a 1500 miles so its not to bad so where else could it be coming from.
I looked under the car and its not coming from the filter or filter plug. It is towards the rear of pan looks like its collecting on the 2 bolts there but coming from some where else. I looked up but didnt see any visual drips i also started it and let it run for a few minutes but it didnt drip or spray while idling.
I just wanna know where i can look and i know this vague but before i go to the dealer and drop $100 for the dye test again would like some feedback!
I also searched like a 100 threads so please help if you can@!
Mario
Last edited by mariofromnewyork; Dec 10, 2009 at 08:31 PM.
Thread Starter
Late Model Domestics
Joined: Oct 2007
Posts: 1,548
Likes: 46
From: Virginia Beach VA
Yeah oil pressure at idle warm sits at 29-31psi and when reving can go up to 55psi ac delco filter. Before i had a mobil 1 filter idle warm 36psi.
Valve cover I look there too.
Thanks
MArio
Valve cover I look there too.
Thanks
MArio
Thread Starter
Late Model Domestics
Joined: Oct 2007
Posts: 1,548
Likes: 46
From: Virginia Beach VA
Team Owner
Joined: May 1999
Posts: 22,830
Likes: 13
From: Columbus Ohio
CI 3-4, 8-9-10 Veteran
St. Jude Donor '06-'08-'10
Thread Starter
Late Model Domestics
Joined: Oct 2007
Posts: 1,548
Likes: 46
From: Virginia Beach VA
Exactly!
I took what the gm techs said and went with it. I had a reputable shop fix those leaks but obviously their are more so just looking for other areas that could be leaking due to the old leaks being sealed up and putting pressure on some others.
I am going to look at the valve cover and i am hoping its not the upper pan gasket.
What is involved with replacing the upper pan gasket?
Mario
I took what the gm techs said and went with it. I had a reputable shop fix those leaks but obviously their are more so just looking for other areas that could be leaking due to the old leaks being sealed up and putting pressure on some others.
I am going to look at the valve cover and i am hoping its not the upper pan gasket.
What is involved with replacing the upper pan gasket?
Mario
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
2027 Corvette vs The World: Every Model vs Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!
Michael S. Palmer
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!
Joe Kucinski
Instructor
Joined: Sep 2009
Posts: 196
Likes: 3
My thoughts would if its not coming from the back of the valve cover or the oil pressure sensor for sure and your sure its motor oil would lead me to believe it’s the rear main seal or oil pan if your sure that’s the area. I would jack up the car clean as much as you can under there around the rear of the motor, pan etc take the car for good drive park it over night and next day don’t move the car see if you can exactly where drip on the floor ( or jack it up) matches under the motor. If it looks like coming from the rear of the oil pan take back to who did the rr main and oil pan. Just one other thing check make sure the oil isn’t dripping from anywhere else up front and as your driving it blows back to around the rear of the oil pan and then when the car sits drip from where the blow landed if you know what I mean.
If they replaced the pan gasket and rear main like you said thats it there is no upper pan gasket in rear as far as I know or is there?
If they replaced the pan gasket and rear main like you said thats it there is no upper pan gasket in rear as far as I know or is there?
Thread Starter
Late Model Domestics
Joined: Oct 2007
Posts: 1,548
Likes: 46
From: Virginia Beach VA
So is there a upper pan gasket?
My thoughts would if its not coming from the back of the valve cover or the oil pressure sensor for sure and your sure its motor oil would lead me to believe it’s the rear main seal or oil pan if your sure that’s the area. I would jack up the car clean as much as you can under there around the rear of the motor, pan etc take the car for good drive park it over night and next day don’t move the car see if you can exactly where drip on the floor ( or jack it up) matches under the motor. If it looks like coming from the rear of the oil pan take back to who did the rr main and oil pan. Just one other thing check make sure the oil isn’t dripping from anywhere else up front and as your driving it blows back to around the rear of the oil pan and then when the car sits drip from where the blow landed if you know what I mean.
If they replaced the pan gasket and rear main like you said thats it there is no upper pan gasket in rear as far as I know or is there?
If they replaced the pan gasket and rear main like you said thats it there is no upper pan gasket in rear as far as I know or is there?
Instructor
Joined: Sep 2009
Posts: 196
Likes: 3
Ok I looked in my 1997 service manual no upper pan gasket just one oil pan gasket. There is a oil temp sensor near the rear of the oil pan and attached to the pan w/gasket maybe could be leaking there? Drivers side near the rear of the oil pan.
Last edited by TR97C5; Dec 17, 2009 at 10:54 AM.
Thread Starter
Late Model Domestics
Joined: Oct 2007
Posts: 1,548
Likes: 46
From: Virginia Beach VA
Ok ill look at that!
Thanks a lot man!
Mario
Thanks a lot man!
Mario
Instructor
Joined: Sep 2009
Posts: 196
Likes: 3
I scaned a quick picture for you from my service manual (#17) is the oil temp sensor (#16) gasket, might be hard for you to see looking under the car because its looks like it might be behind (#21) the close out cover.
Last edited by TR97C5; Dec 17, 2009 at 10:53 AM.
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
I had my '99 in for a leak a long while back. The dealer said it needed a new pan gasket which I provided to them but they also said a plug for where a distributor would go for non-electronic ignition usage, was leaking too. Somewhere on the rear of it, but I never saw the thing. I know oil was leaking from something up above the rear of the engine but sure couldn't see it and I know it was not the oil pressure sender. Anyway, whatever they fixed, it stopped.
Thread Starter
Late Model Domestics
Joined: Oct 2007
Posts: 1,548
Likes: 46
From: Virginia Beach VA
