Wahler 82C* T stat.. where to buy a good one?

[smokeyfan1000]

OK , tested "old" stat. It too is a 82C*(179.6 ) T stat. All I have for thermometer is my A/C /Refrigeration one. It reads from 0-220F* and also has C* markings.

I have no way of knowing if it's 100% accurate though.

I heated stat to 180F*. It should be fully open by then if I am correct. But it did not open at 180F*. It only began to crack open at @ 185-188F*and was only very slightly open at that temp.

It finally fully opened at 198-200F* and it took @ a minute at that temp to fully open

So I presume this stat was faulty. Or do stats only slightly crack open @5-8F* AFTER the designated temp?

[TrickMick]

your test confirms a CRAP T-STAT...."rated opening temp" *SHOULD*
yield a smoth opening and all in by 5* F above rated temp..an 18* spread is
too much...good eye!

[smokeyfan1000]

Originally Posted by TrickMick

your test confirms a CRAP T-STAT...."rated opening temp" *SHOULD*
yield a smoth opening and all in by 5* F above rated temp..an 18* spread is
too much...good eye!

After testing it several more times, I find it's closed at 180F*, starts to barely crack open at 185-190 or so, and is not fully open until the 200F* mark.

It seems to me that this explains the Inst Clstr gauge readings. But I will drive the car with new stat and keep a very close eye on both the IN. Clstr gauge reading cyl. head temp & the VDO 52mm gauge reading block temp

[TrickMick]

http://www.harborfreight.com/catalog...ult?q=infrared

[smokeyfan1000]

Originally Posted by TrickMick

http://www.harborfreight.com/catalog...ult?q=infrared

Yep, been wanting one of those for @4 years. Guess I need to buy one finally.

My findings with the old T stat has given me a new description for how it operates improperly. I call it a *LAZY T STAT*. It finally fully opens ,but not at temp it's supposed too

[smokeyfan1000]

Also, I have a question TrickMick. When viewing the t stat as it would sit in the cyl head,What the hell does that little shaft with a ball like retainer on the bottom of it's end, and mashed flat on it's top side end do?

It does not seem to limit T stat valve opening distance, and seems to have no real purpose. is it a "pressure equalization/relief valve of sorts? To equalize cyl head & radiator coolant pressures when the engine is cut off and cooling down?

[TrickMick]

Originally Posted by smokeyfan1000

Also, I have a question TrickMick. When viewing the t stat as it would sit in the cyl head,What the hell does that little shaft with a ball like retainer on the bottom of it's end, and mashed flat on it's top side end do?

It does not seem to limit T stat valve opening distance, and seems to have no real purpose. is it a "pressure equalization/relief valve of sorts? To equalize cyl head & radiator coolant pressures when the engine is cut off?

you mean the *bubble valve"??..sits up top of the TStat as installed to let bubbles flow and
coolant to bypass closed TStat and keep it from AIRLOCKING...

[smokeyfan1000]

Originally Posted by TrickMick

you mean the *bubble valve"??..sits up top of the TStat as installed to let bubbles flow and
coolant to bypass closed TStat and keep it from AIRLOCKING...

OK, that makes sense.

I was researching t stat posts before making this thread. In another thread(which I cannot find now) one said it was to keep the T stat from failing in the closed position. Which is utter BS, as it cannot do that.

[smokeyfan1000]

ONE DAY AFTER UPDATE:
So far new stat is doing well. No temp gauge craziness. And FCPG is letting me return the "old" stat for a refund. Seems I bought it in Sept of 2011, longer ago that I remembered it being, but still was just inside the 1 yr warranty.
Thanks FCPG!

[smokeyfan1000]

UPDATE

Was driving to store in Burl today. Ins. Cltr temp gauge rose to previous high reading, but then dropped right back down within one block. Unsure if this stat is beginning to do what last one did, or was just regulating engine temp, or if, in fact gauge is suspect.

Wil continue to drive it, and inmeantime, I plan to go to Dealership & order a Vernet brand t stat to install and see if it does same. I figure this will prove/disprove if gauge is starting to fail

I'm also wondering if viscous coupling fan is going out. Going to see if I can find how to "test" for bad visous coupling (clutch) in engine/radiator cooling fan

[Blue245Ti]

Could be an air bubble in the system. Also, you did get the jiggle pin positioned at the top when you installed the thermostat, right?

-J

[smokeyfan1000]

Originally Posted by Blue245Ti

Could be an air bubble in the system. Also, you did get the jiggle pin positioned at the top when you installed the thermostat, right?

-J

Don't recall. Never had a problem with it before on other 240s & never positioned it in any specia location. Might try that though

[apachechef]

Originally Posted by smokeyfan1000

Don't recall. Never had a problem with it before on other 240s & never positioned it in any specia location. Might try that though

If you open it again, test both/ all the tstats you have in a pan at once.

[ziddey]

Originally Posted by TrickMick

http://www.harborfreight.com/catalog...ult?q=infrared

Got one of those with a supercoupon for $20 once. Pretty awesome to see it measure exactly the right temps at the different flanges when the tstat opens / fanswitch trips for low/high speed (different car). Spot on if you can aim it right. The laser sight is not going to be spot on.

[Jordan]

I always had odd problems like this on my old 240 as well. I always assumed it was due to the cooling fan being unshrouded and the rad being partically blocked by the intercooler.

[clthayer]

Originally Posted by smokeyfan1000

Don't recall. Never had a problem with it before on other 240s & never positioned it in any specia location. Might try that though

On my previous 760 I installed the t-stat upside down and got wierd readings - reinstalled with the hole at top and readings went back to normal. I associated with an air bubble in the system. Never sure though.