summertime coolant temps?

[turbo buicks]

i didnt know they had stock tranny coolers and apparently the guy who had it last didnt either as he installed one on the car. it is rather large. could this be the reason for my high coolant temps?

 

[atl gn]

I don't know if it has a tranny cooler integrated, I believe it does but the trans fluid definately runs through the radiator. I guess the radiator is what I've narrowed it down to since there is no way to tell if the water pump is going bad and I don't think that there are any mechanical problems to make it run hot. At 15 years and 117K, that radiator has definately seen better days.

 

[atl gn]

Whoops,I guess I was a little late on that post!!!

 

[turbo buicks]

LOL

 

[atl gn]

Is your trans cooler laying on the radiator, or is there a little space in between the two. I installed a trans cooler with the new trans--thanks Bruce--and it didn't make it run any hotter.

 

[Steve Wood]

Originally posted by atl gn
I don't know if it has a tranny cooler integrated, I believe it does but the trans fluid definately runs through the radiator. I guess the radiator is what I've narrowed it down to since there is no way to tell if the water pump is going bad and I don't think that there are any mechanical problems to make it run hot. At 15 years and 117K, that radiator has definately seen better days.

Sometimes, the water pump impeller may corrode if the coolant was not changed fairly regularly. Normally, the seal on the shaft gives up (or the bushing goes out) before the impeller gives up, tho.

Most likely the tubes in the core are full of deposits and the bond of the fins to the tubes has begun to go bad. Cure is usually a new core.

 

[turbo buicks]

the car has a new tranny and i believe that it had the cooler put in at the same time. the cooler sits right onthe radiator, there is no space between it and the radiator. the cooler is obviously an aftermarket peice b/c its kinda mounted crooked, and the guy said he added it.

 

[FlyinGN]

FYI- ALL automatic transmissioned cars have tranies coolers within the radiators.. What makes our cars special is the internal ENGINE OIL coolers also in the radiators.. All this adds to hotter coolant btw.. If you ran seperate engine and trans coolers the coolant temps would drop ..

 

[Way2QWK]

What do you guys think of my coolant temps with a stock system. Except for a 160 stat and some RM-125. I have a new stock size radiator, new motor,stock fan wired for constant high speed. The Turbolink shows 195-205' in 105 degree city driving.

I just ordered a dual fan and did not see any diff with the RM-125

I was thinking of doing a seperate oil cooler to lower temps.
any more ideas?????

In the winter it ran only 160-170

 

[atl gn]

That front mount is gonna kill your temps, especially in arizona. If you feel like spending the money, look at www.becool.com or www.chargedair.com. Charged air is the only one I have found that offers a submerged cooler. I am suprised its only running that hot in 105*!!

 

[Steve Wood]

Originally posted by Way2QWK
What do you guys think of my coolant temps with a stock system. Except for a 160 stat and some RM-125. I have a new stock size radiator, new motor,stock fan wired for constant high speed. The Turbolink shows 195-205' in 105 degree city driving.

I just ordered a dual fan and did not see any diff with the RM-125

I was thinking of doing a seperate oil cooler to lower temps.
any more ideas?????

In the winter it ran only 160-170

If it does not get over 205 sitting in traffic, that is pretty good. Actually very good, in my opinion.

Pretty similar to my GN except that I run the CAS three pass behind the front mount and I have dual fans.

It's all about air flow at idle from my experience. Running separate oil and tranny coolers probably gave me 7 degs or so. After installing dual fans, I went back to running the tranny thru the radiator and the temps went up a bit. Last summer, 193 was about as hot as I saw sitting in traffic. That was running the AC. A friend behind me with a front mount but a stock radiator called me and asked how hot my car was. I told him 193 and he said he had just turned off his AC because he had hit 220. We had just driven about 40 miles on the freeway and had gotten off to do the light to light bit in traffic.

Running 134a in the AC puts more heat into the mix as well. I suspect that is worth 5-10 degs more coolant temp.

Dual fans to pull more air thru the core at idle should help. My car never ran hot at speed, it was in traffic that I paid the price of a front mount. I am running Spals but the Ramchargers fans look like they pull pretty hard and they are cheap.