YOU got me there, for sure! Ha ha!
MK

 

Not GB, but yes that is where it is coming from.

 

Ofcourse it did and I would ask for the money back from the rad shop.

 

Let me figure out how to properly word this....Duh

 

Uh.....is it "Yes"?

just checked my experiement again. reservior is half full now, bucket is near full under the radiator being fed by the leaking oil cooler. What a bunch of baffoons those guys are at the radiator shop. they were so proud of their paint job and reseal of the side tanks. And, " a bunch of other things, that we fixed and dont ask how we fixed it. " Oh brother. I dont think Ill trust them to do anything with this radiator now. that decision is easy.

so, the cooler in side tank is removed and and put in my side tanks, or is the entire assembly removed from the side of the radiator, and the new side tank with its oil cooler replaced and clamped back on with a new o ring seal?

Pretty excited that the engine probably doesnt need to be pulled. the thought of removing those headers makes me cringe, but getting the intake off to replace that suspect knock sensor, would have been a side benefit.


mk

 

Hey MK,

Seems like you got it resolved, and won't need the lines and fittings.. If you still do, let me know..

Cheers,

 

So Greg, is this what would have happened to me if you hadn't replaced that oil cooler when I picked up the car and drove home to Iowa?

 

Why not just cap the cooler ports on the rad and install an aftermarket air cooler? This would be the perfect time to upgrade to something better.

 

No, your cooler sits below the radiator and is cooled by the passing air....took them a few years to figure out oil and water work poorly together. Your cooler would have just leaked more and more, until you lost all the oil.

Not nearly as hard to determine the problem, when this happens....unless Kibort is living nearby and helps.

 

Ouch

I suppose they did an oil/water cooler as tranny/water is commonly done. I always considered the tranny "cooler" to also be a heater as well in really cold climates. No need for that effect with engine oil.

 

It only flows oil through the "cooler" once the oil is up to temp really. So it wouldnt even help get the engine oil up to temp really.

 

Good point. Shoulda thought about that.

I was also thinking that the tranny fluid would be under less pressure. Less fatigue on the cooler tubes. I don't recall anyone saying they had ATF in their water, and vice-versa.

 

I Just jacked up the passenger side and opened the drain plug. of course, no water. so thats good. it seems we have found the leak. (as Greg knew all along, but I had to find out the hardway! )
anyway, I guess the 5 bar oil pressure made a small pin hole breech and then the oil very very slowly entered the water. I bet less than a half a pint in total if I was to guess. BUT, due to the viscosity causing the oil to move through the hole much more slowly, the water was free to travel into the oil and had more pressure (reservoir was above the radiator, where oil is below so no force on the oil to go into the water side) . I lost a quart over the last two nights and its still going. I suspect this is the issue and will look forward to mounting the oil cooler that greg sends up. I just hope its good!

as far as the design of the oil cooler in the radiator goes, you have 260F oil on a 100 degree race day, adding heat to the 190 degree water temp. that is pretty good at keeping the oil cool, if the water cooling can keep up, which mine can at my power levels. non race conditions, the oil temps are around 180 on the freeway, and around town, near 190 -200. still near the same temp as the water. I dont think you want the oil much cooler, in general, as the engine is designed to work at this temp and the water as well (middle of the scale on the water is near 170 degrees I think). I do wonder if an air oil cooler with 100 degree air moving through the little cooler can remove as much heat as a water to oil cooler, which has 190 degree water, running in almost direct contact with 260 degree oil. It , at least, would be an interesting experiment since i have many years of racing with the oil and water cooling system.


Then, back to turning this thing into a race /street car!

thanks,
Mk

 

Glad to hear you've found the source of the problem. I think I hear an echo

 

I will have to say, this is the first thread I have ever read that MK was not sure of himself, right or wrong, 99.9% of the time Mark does not waver in his beliefs.