LT1 oil leak!
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On The Tree
Joined: Jun 2005
Posts: 105
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From: Houston
LT1 oil leak! I have a pretty bad oil leak. I was wondering what is the easyest way to drop the oil pan to change the seal? and also what to check in the bottom of the engine when i get the pan off because i plan on doing a heads and cam install in the future.
Thanks
Thanks
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Originally Posted by bichin95redta
Wasn't the rear of the intake manifold a bad spot for oil leaks on LT1's, too?
I always had problems with the water pump drive seal. Also, I just recently discovered I had a valve cover leak which was baffling me to death. Be sure you know where the oil is coming from before you start replacing stuff cuz you can start cussing real quick. If you can pinpoint the oil pan, something I tried was smear a good bit of RTV on the afflicted area. There's no pressure down there so it holds it in pretty good. Some would say this is pretty mickey mouse but hey, it's cheap and fast and the end results are almost the same.
Oil pan leak, might as well pull the motor. Back of the intake is the same as any chevy small block dating back to the 50's. There is either a bead of silicone or silicone and a very cheesy rubber gasket. I personally would pull the intake off in the car, clean up the mating surfaces, and forget the flimsy gasket and just black RTV the gap. Do not be conservative on the RTV. Water pump seal, have fun. You'll likely have to pull the timing cover off. To get the timing cover off you will have to drop the oil pan .25". To drop the pan .25", you'll most likely have to pull the motor. Valve cover gaskets are a very common leak, but those are easy. The passenger side you will have to remove the alternator to pull the cover. I've been down the oil leak road, its not fun at all. My water pump gasket leaks right now, spits oil all over the opti and coil at high RPM's. Not cool!!!
Originally Posted by 94strokedz
Oil pan leak, might as well pull the motor. Back of the intake is the same as any chevy small block dating back to the 50's. There is either a bead of silicone or silicone and a very cheesy rubber gasket. I personally would pull the intake off in the car, clean up the mating surfaces, and forget the flimsy gasket and just black RTV the gap. Do not be conservative on the RTV. Water pump seal, have fun. You'll likely have to pull the timing cover off. To get the timing cover off you will have to drop the oil pan .25". To drop the pan .25", you'll most likely have to pull the motor. Valve cover gaskets are a very common leak, but those are easy. The passenger side you will have to remove the alternator to pull the cover. I've been down the oil leak road, its not fun at all. My water pump gasket leaks right now, spits oil all over the opti and coil at high RPM's. Not cool!!!
You could always get a dye kit to accurately find the leak.
Teching In
Joined: Aug 2005
Posts: 27
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From: Detroit, MI
Originally Posted by brandboZ28
Ive had my pan out a few times without ever pulling the motor. All you have to do is unbolt the motor mounts and jack the motor up a little. Its no big deal. Also, taking the pan out inst completely necessary when changing the pan gasket. Some people just completely unbolt the pan and let it sit on the k-member while they "stretch" the new gasket over the pan. Ive done it both ways and its not a big deal either way.
You could always get a dye kit to accurately find the leak.
You could always get a dye kit to accurately find the leak.
And like the other guys said, try and make sure you find exactly where the leak is coming from first so you don't waste your time. 
Another thing that causes intake seal leak along the back, is the egr crinckle tube coming off the exhaust manifold or header. The best thing to do is header wrap this small tube. It heats up the rtv bead if you dont only to make it brittle over time.
A lot of the time this leak will run downt he back of the motor to make it look like a pan leak.
I would suggest to clean up as much of the oil as you can, and then look for the leak and where it is comming from thereafter.
A lot of the time this leak will run downt he back of the motor to make it look like a pan leak.
I would suggest to clean up as much of the oil as you can, and then look for the leak and where it is comming from thereafter.
Teching In
Joined: Jul 2005
Posts: 39
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dude, thats sucks mine is also leaking but from the plug, im pretty sure the thread on the pan is stripped, any way i can go abouts fixing this without getting an entirely new pan, thatd be awesome, any info would help!
- Greg
- Greg
