My engine oil cooler is leaking - correction

[giant h2]

The plastic fins on the engine oil cooler has a vertical crack (drivers side) and is oozing oil. What are my options for repair?

[HummerJim]

American Racing makes a metal (titanium?) oil cooler for the Chevrolet Corvette LS6 engine that I've seen adapted to the Hummer. Someone did it here on their H2 years ago and was very happy with it. It even comes with adjustable brackets for installation. I've had the hoses to oil coolers fail, but never the unit itself. You could also consider adapting a tranny cooler, because lots of people make aftermarket transmission coolers. I'd buy a new one instead of trying to repair yours.

[giant h2]

Originally Posted by HummerJim

American Racing makes a metal (titanium?) oil cooler for the Chevrolet Corvette LS6 engine that I've seen adapted to the Hummer. Someone did it here on their H2 years ago and was very happy with it. It even comes with adjustable brackets for installation. I've had the hoses to oil coolers fail, but never the unit itself. You could also consider adapting a tranny cooler, because lots of people make aftermarket transmission coolers. I'd buy a new one instead of trying to repair yours.

Thanks Jim, what do you think of adding an after marker trans cooler and using the oem external trans cooler for engine oil?

[HummerJim]

That sounds like an idea, however the LS6 optional engine oil cooler is much larger in area than the Hummer transmission coolers. I also wonder about the difference in pressures on the cooling pipe design. I'm sure someone has tried this before, but I can't find it in the search.

[pdxrealtor]

You need to do the Trans cooler mod as well. I posted links with a lot of info in your other thread.

I haven't seen much info on external oil coolers..

Good luck with it and let us know how it ends up

[giant h2]

Originally Posted by pdxrealtor

You need to do the Trans cooler mod as well. I posted links with a lot of info in your other thread.

I haven't seen much info on external oil coolers..

Good luck with it and let us know how it ends up

For the sake of time i had the local tire store replace it with a new OEM radiator. Engine oil and Trans oil both look good. The old rad was cracked and leaking from the front of the black plastic tank on the driver side of the rad which i believe houses the fluild to fluid heat exchanger for the engine oil?

[giant h2]

Originally Posted by pdxrealtor

You need to do the Trans cooler mod as well. I posted links with a lot of info in your other thread.

I haven't seen much info on external oil coolers..

Good luck with it and let us know how it ends up

For the sake of time i had the local tire store replace it with a new OEM radiator. Engine oil and Trans oil both look good. The old rad was cracked and leaking from the front of the black plastic tank on the driver side of the rad which i believe houses the fluild to fluid heat exchanger for the engine oil?

[pdxrealtor]

I figured youd need a new radiator. How much did that set you back?

You should really consider the external Trans cooler/radiator bypass.

It will prevent catastrophic failure to your Trans and cooling system and your tranny will run much cooler, a very good thing.

I just got back from camping. We pulled a trailer up the same mountain I snowboard at all winter. In air temps 30-40* warmer and WITH the trailer I was towing the tranny never got above 150*.

In Winter time towing nothing I'd hit 200* degrees easily...... That's huge temp reduction which is very beneficial to our trannys.