88 C vs 82 C thermostat (1 Viewer)

[108Cruz]

This morning I replaced my thermostat on my 90 2LTE.

I noticed that the one I pulled had a 88 C stamp on it. The new one ( original Toyota part from dealer ) had a 82 C stamp on it.

Once installed I checked for leakes and all seemed OK. I have not yet test run the engine on a drive to see the difference.

I read on the forum that the 82 C thermostat makes the engine run somewhat cooler and prevents overheating.

Is there any problem if I leave the new 82 C stat in ?.

Will I still get good heat in the winter time /.

Thanks.

 

[BURGER]

82c for the summer and an 88c for the winter. All the numbers are is telling at what temp the thermostat will open so a lower one will open sooner so you get more coolant flowing throught the motor in turn keeping the motor cooler(kind of). The 88c will allow the motor to get hotter before opening so the motor gets hotter faster in the winter.

 

[108Cruz]

Thanks for the reply.

I test drove the truck this afternoon and there was a definate difference in cooling. My temp guage needle was in the 1/4 - 12/ range whereas it was always in the 1/2 range before. I also noted that my coolent overflow bottle did not rise as much as before when idleing ( it rose almost to overflow before )

If the lower temp ( 82c ) is for the summer, should I change to an 88c come winter time or just leave it and just put up with a little longer warmup time when it gets cold.?

Thanks.

 

[nickw]

Thanks for the reply.

I test drove the truck this afternoon and there was a definate difference in cooling. My temp guage needle was in the 1/4 - 12/ range whereas it was always in the 1/2 range before. I also noted that my coolent overflow bottle did not rise as much as before when idleing ( it rose almost to overflow before )

If the lower temp ( 82c ) is for the summer, should I change to an 88c come winter time or just leave it and just put up with a little longer warmup time when it gets cold.?

Thanks.

You will be fine leaving the 82c in all year round. In the winter I usually fit some cardboard infront of the rad. That will make the biggest difference. Just when you do fit some cardboard play around with the size of hole you put in. You don't want to small of hole so you overheat, but you want it small enought to warm up fast.

In fact your truck might even have a blind that pulls down in front of the rad. My 81 has one


Cheers,
Nick

 

[David*BJ70]

In fact your truck might even have a blind that pulls down in front of the rad. My 81 has one

I think the blind is on the 60 model only... not sure... my 1983 ex-BJ60 has one and it show the same for the 60 1985 model in the owner manual.

 

[brownbear]

My 84 60 has one. They are great.

I did the cardboard trick on a t100 I had. Almost screwed the engine with it. LOL. it swelled up due to water splashing on it. And no air got around it at all. I was driving along on the highway. it got warm out and I saw the temp gauge go the red. I pulled over and due to the swelling it was a true beast to get out of there. I had it put in a slot in front of the rad.

I should have pulled it out much earlier, but forgot about into the spring.

I like the shudder on the bj60. easy to go up and down based on temps outside.

 

[108Cruz]

I checked and I don't have one of those blinds in front of the rad.

I have used cardboard before in the winter ( on gasser's ) and have had no problem with them. If it got too wet/slushy I pulled the cardboard.

There seems to be lots of room to put something if front of the rad come cold weather time.

Thanks for the replies.

 

[Gold Boy]

88 C vs 82 C thermostat...

I run an 88C thermostat winter and summer in a 13bt, with no problems.

 

[108Cruz]

The main reason I changed the t-stat was that I had just bought the veh. about two months ago. The t-stat was about the last thing I changed over ( oil.fluids,rad cap ).

In the last few weeks, I noticed that my overflow bottle sometimes came very close to flowing over during drives in 25 C plus temps. A feww days ago I went on a 1000 km trip into the Okanagan area of BC and was stuck in bumper to bumper traffic for over 1/2 hr trying to get across the floating bridge in Kelowna , BC. When I refueled shrtly after the bridge crossing I checked my engine and noted the overflow bottle had leaked out a bit of collent .

I immediately bought a new genuine Toyota T-stat from a dealer. The dealer automatically gave me this t-stat ( 82 C ) without me knowing the difference at the time. Since installing it I noted right away that the veh. was not running as hot and I've had no overflow problems since .

The old 88C I took out seemed to still be in good shape and I will keep it just in case.

I will leave the new 82 C in the veh. and see how it goes in the colder temps come fall/winter.

Thanks.

Peter

 

[crushers]

I think the blind is on the 60 model only... not sure... my 1983 ex-BJ60 has one and it show the same for the 60 1985 model in the owner manual.

SOME 42s had the blind.
Some 60s had the blind.
i had a JDM 74 come in with the blind (add on?)
i had a BJ61 come in with the blind...

 

[crushers]

factory stock here in Canada was the 88C one...

 

[Gold Boy]

Just got off the phone from speaking to Penticton Toyota. They said that there is not a 82C T-stat for the 3b (same t-stat as 13BT I assume).

Can anyone confirm this?

 

[108Cruz]

I have a bit of a problem now.

As you recall I changed my t-stat. I removed the old one which was a 88 C. The new one was a 82 C.

In the past 24 hrs. since I changed the t-stat, I have had two incidents on a start up ( one cold the other warm ) where I had a lot of white smoke. It smoked for about 1 minute solid ( pure white ) and then it went away and every seemed normal again.

I drove the veh. for awhile and the temp guage got just below the 1/2 mark and stayed there.

I checked the engine bay over and found no coolent leaks and my overflow bottle was right at the full mark.

I then turned my heat controls in the cab on to full hot and it blew warm for a few minutes then it changed to cool air while veh. was idling.

I still have my old t-stat that I may put back in to see if there is any difference.

Any idea's as to what the problem (s) might be.- Faulty t-stat, cracked head/gasket.?

Thanks

Peter

 

[crushers]

pop the cap and check the level. then do a coolant pressure test when the engine is warm.
sounds like a cracked head to me...

 

[Gold Boy]

Sweet smelling steam coming from the tailpipe?

Any bubbles in the over flow coolant tank next to the rad, when the engine is running?

You could also have a air lock in the coolant system.

I doubt if the t-stat is faulty, if the the temp guage got just below the 1/2 mark and stayed there.

Any smoke when driving?

 

[nickw]

pop the cap and check the level. then do a coolant pressure test when the engine is warm.
sounds like a cracked head to me...

Sounds the same to me.
Or maybe a head gasket (if he is lucky).

I had a suzuki LJ80 that did this. I was lucky and it was just the head gasket.
I would get this looked at ASAP. Have a diesel shop to a compression test.
Also keep and eye on your oil, at the first sign of it turning cream colored (cream in a gasser anyways), have it towed.

Cheers,
Nick

 

[nickw]

By the way, what model do you have?

 

[108Cruz]

When I had a cold start up yesterday, I walked into the white smoke and did not note the usual diesel smell. I could'nt say for sure but it did smell somewhat different.

When you shut down the engine , you can hear bubbleing in the overflow tank as it fills up but does not usually go past the full marker on the bottle.

I have a 90 LJ71, with only 64,000 k's.

I will do a cold start up later when I go to town and see what the smoke situation is.

Peter

 

[108Cruz]

Sorry , I forgot one more thing...

When I drove yesterday after the white smoke cleared, there was no more white smoke, just the usual little bit of black smoke on acceleration.

I will post an update when I start the veh. this morning and see if it still smkes.

Peter

 

[crushers]

When I had a cold start up yesterday, I walked into the white smoke and did not note the usual diesel smell. I could'nt say for sure but it did smell somewhat different.

When you shut down the engine , you can hear bubbleing in the overflow tank as it fills up but does not usually go past the full marker on the bottle.

I have a 90 LJ71, with only 64,000 k's.

I will do a cold start up later when I go to town and see what the smoke situation is.

Peter

how long have you owned the unit?