Where do the oil cooler lines on a 88' GTA go?
Thread Starter
Junior Member
Joined: Jul 2010
Posts: 50
Likes: 1
Car: 1988 Pontiac Trans-Am GTA
Engine: 383 stroker tpi
Transmission: 700r4 Transgo full shift kit
Axle/Gears: 2.73* Posi
Where do the oil cooler lines on a 88' GTA go?
I have a 1988 trans am gta with a stock oil cooler. I have it installed on my oil filter and I do not know where the lines go to. I know they go to the radiator but someone said one goes to the radiator and the other goes to the heater core or an adapter that goes into the block. I am stuck and if somone can send me a diagram or somthing to help it will be greatly apreciated.
Also im not quite sure how the rest of my cooling system gets hooked up due to the previous owner having the car completly apart.
Thank you
Also im not quite sure how the rest of my cooling system gets hooked up due to the previous owner having the car completly apart.
Thank you
Joined: Jun 2000
Posts: 5,364
Likes: 51
From: Enschede, Netherlands
Car: 82 TA 87 IZ L98 88 IZ LB9 88 IZ L98
Engine: 5.7TBI 5,7TPI 5.0TPI, 5,7TPI
Transmission: T5, 700R4, T5, 700R4
Axle/Gears: 3.08, 3.27, 3.45, 3.27
Re: Where do the oil cooler lines on a 88' GTA go?
One goes to the radiator, the other to the T junction on the hard line.
There's no adapter into the block, that's only done that way on Corvettes
This pic might help:
Look at the braid sleeve covered lines
There's no adapter into the block, that's only done that way on Corvettes
This pic might help:

Look at the braid sleeve covered lines
Thread Starter
Junior Member
Joined: Jul 2010
Posts: 50
Likes: 1
Car: 1988 Pontiac Trans-Am GTA
Engine: 383 stroker tpi
Transmission: 700r4 Transgo full shift kit
Axle/Gears: 2.73* Posi
Re: Where do the oil cooler lines on a 88' GTA go?

On the diagram it says a hose goes from the heater core to a metal pipe(which is on my car now originaly) now the out line looks like it hooks up to the overflow part of the radiator. Could that be true because it the diagram looks like it makes sense besides that part. Also on the diagram where the hose is labled 5 where does that go cuz it shows it just ending.
Thanks for your help
Thread Starter
Junior Member
Joined: Jul 2010
Posts: 50
Likes: 1
Car: 1988 Pontiac Trans-Am GTA
Engine: 383 stroker tpi
Transmission: 700r4 Transgo full shift kit
Axle/Gears: 2.73* Posi
Re: Where do the oil cooler lines on a 88' GTA go?
Never mind about the 5 part i see where it goes
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