There are 2 spots for hoses to come off the oil filter adapter! Where do these hoses go?

 

Mine go to an oil cooler, one is an input and one is the output

 

is the cooler if front of the radiator? Have any idea where i might be able to get replacement hoses? other than chevy? I can't find them at the auto parts store!

 

which one is the input and which is the output! Top or bottom?

 

Without seeing the adapter I can't tell, I would think any good auto parts store would have hoses you can buy and cut to length, its as easy as pie.

My cooler was an aftermarket that I put on, the hose set came with the kit.

Take the adt nippels to the store with you to match up the correct size

 

is this an aftermarket part or did the 1990 convertible come with it? i guess i could just go to chevy and find out the hoses huh? they are just really pricey!!

 

Yours sounds like it is aftermarket.

I think the Z51 pkg had an oil cooler in its equipment list

 

how would i know if it were a z51?

 

Your description sounds like a factory oil cooler to me. Those connectors carry antifreeze from a fitting on the block and a tee up near the a/c compressor. Your car may have lost a hose in the past and it got bypassed. benny

 

If you go to Corvette Fever's web site, and check there tech articles, there is a writeup on changing these hoses. They are formed hoses, so you may have to get them from GM.

Good luck

 

I agree with benny, it sounds like an oil/water cooler. The oil goes directly through it, and the water goes in and out to the heater hoses.
one goes directly to the block opposite side from the knock sensor, and the other one tees off the heater valve hose. You need the aluminum tube that gets the water around to the right side though.
There are two kinds. one is the one that came on the car from the factory. That kind has the bracket spot welded to it.
The secone kind has a clip that bolts to the pan bolt, and the tube snaps in place.
Why 2 kinds? because it's impossible to install the one with the bracket welded to the tube without removing the motor mount bolts and raising up the engine.
The one with the clip is hard enough to wrangle into place without the bracket on it.
I just may have an extra tube laying around...............don't remember if it has a bracket or not, but if you saw off the bracket, you can make a clip type bracket, and clip the tube into it pretty easy.

 

He has the OEM tube - refer to his other post on this subject.

As for the hoses and which way to plumb the adapter - it doesn't matter. Regular aftermarket heater hose is all the stuff is. Yes, you can get pre-formed hoses for a lot more money, but there is really no need.

There is also no difference which fitting on the cooler/adapter (we Are talking about the factory cooler here..) you use as the "in" vs. "out", coolant just circulates in a ring chamber around the central passage for oil - it doesn't matter which way it goes.

The aluminum tube you have goes around and under the block/oil pan and up to beneath the a/c compressor where it tees into the heater hose line coming off the water pump. Down at the filter end this tube connects (with a short piece of hose) to either of the ports in the oil cooler/filter adapter.

The Other port connects (with another short piece of hose) to an adapter fitting threaded into the coolant drain hole located just above the oil pan rail in the middle of the block - call it 8" forward of the oil filter pad. It's only a 1/4" NPT thread - not much coolant flow thru that fitting!

All that said - frankly I wouldn't bother to put the thing back on there. It's a marginally effective cooler at Best. 95% of all the small block chevy's ever built don't have such a cooler and oil temperature is not a problem - if you feel that You Will need a cooler, because of the way you drive, or whatever, then buy a "Real" aftermarket oil cooler and add it on. All the factory thing does is rob coolant flow from the heater and provide another place for a leak...