enjine

I've read through this thread and I'm wondering if a 1997 3.4L T100 SR5 would be affected by this issue as well. I think that's the same engine as the 4Runners of that year, although I know the T100s were all made in Japan, so maybe they have some variant of parts.

Would a koyo a1998 fit in a 97 T100? I didn't find the radiator for the T100 listed on go-parts.com, where others have ordered theirs.

quicksilvr

I don't know if anyone has commented on this....if they have I certainly have missed it.

Do the '96-'98 4runners EVER get hit by the milkshake? It seems like it is only '99 and newer....and mostly '99s at that.

kball

4runners are all made in Japan, so the parts should be the same.

That's a good question. I just took a quick look around (too lazy to do real searching) and all I found was 99's a 2000 and a bunch of people who don't put their truck info in their dang sig!!

I believe I have seen older (96-98) runners that this has happened to. It sure seems like the majority though is the 99 and ->

quicksilvr

Haha, I thought the same thing about not knowing what year's peoples rigs are, because there is no sig info! It sure seems like it's mostly 99's on newer. And the random earlier one would be just that.....random. I don't think I'd consider it a "problem" with the 96-98 years. I would definitely consider it a problem for the '99's.

msalvini

I have been looking around and I am wondering if I need to be worrying about this issue. I have a 2001 4 runner and have 117000 miles now. In my searches I have mostly noticed 1999 and very few 2000s having this issue. Maybe it is not how many miles you have but how long time wise the radiator is in use. Thanks for any responses.

Ron Helmuth

It's a relatively cheap and easy piece of mind for you auto tranny guys to simply replace the radiator for all years of the 3rd gen.

It's a gamble if you don't. Are you willing to risk your (insert cost of $$ new or used here) auto transmission for about $170.00 worth of parts and easy labor?

It is easy work. I'm a mechanical numb nutz and it took about 45 minutes. Single hardest part was those infernal grille clips. Some folks suggest you can do the work and leave the grille in place. I preferred to have the frontal/ upper access so went ahead and took it out on my friends 01 Limited.

With a buddy or two this is such a simple job you would be kicking yourself if you suddenly got the milkshake and trashed the tranny. Why risk it?

msalvini

I decided to just go ahead and buy the radiator. Went to go-part and the Koyo A1998 was 133.85 shipped. Small price to pay for piece of mind.

J2F42C

While you are replacing the radiator, replace both hoses as well as the t-stat if you don't mind spending a little more money and if you plan to keep the 4 runner for some time.

I think Ron changed out his hoses and the like with his radiator but I cannot remember.

enjine

For those of you who are familiar with koyo radiators, I'm having trouble locating the exact model for mine. The parts selector on their website (koyorad.com--very nice btw) gives me this information:
Part #: C1512
Industry #: 1512
Years: 1993 - 1998
Make: Toyota
Model: T100
Engine: 3.4L V6
Transmission: AT
Rows: 2
Note:
Included Parts:
TOC: Diam. 1 1/4
EOC: N/A


But a google search for that part number comes up with information saying that it is only for the 1993,1994 T100s--which are the 3.0 engine, not the 3.4 in mine:

http://www.google.com/search?q=koyo+...79d16afb7c5e23

My truck is a '97 4wd automatic 3.4l. Is there any other way to verify which koyo is the correct one other than trial and error?

Qyota

You want part number 1998 (or A1998). Many other manufacturers (TYC included) use this number as well, sort of as a cross-reference.

http://www.go-part.com/9602-toyota-4...8-p-23842.html

maxspeed96ct

I ordered a koyo from ebay for 124 shipped . The thing fit better then what I had in there. Also installed my bm trans cooler but I kept it in series. The bm kit came wit everything, but I purchased a diffrent barb fitting from home depot cause the one that came wit the kit is alittle to small for the oem hose.

brian24

Just had my radiator + thermostat replaced by a local Toyota shop. Total cost: $345 for parts, labor and tax. Location: San Diego, CA

Truck: 97 4Runner, Limited 4x4 @ 195,000

Reason: Preventive maintenance due to worries about a failure.

:wabbit2:

4byrunner

From what i'm reading seems like the start up and idle temps and around town stop and go driving temps do not differ much between the bypassed and stock in-radiator setups, however from the information i'm seeing the bypassed setup seems to over-cool once in OD for extended lengths of time in extreme cold situations.

Maybe the benefit we are overlooking when it comes to the factory setup is the engine coolant keeping the ATF temps up to a reasonable temperature when in OD for long commutes??

Any thoughts?

Qyota

This is what we've been discussing in other threads, and in other forums. The real question is - how cold is too cold? We know that anything over 200 is undesirable...but we don't have the same confidence in naming a magic "too cold" temp. In my experience, the truck shifts/acts the same whether the trans fluid is 50F or 170F.

85GT-79FJ40

FWIW my 2000 has 208k on it with the original radiator. I do plan on changing it soon though. It's had regular prestone in it since 140k too with no issues. The tech guy for the TLCA did an column last year about a 4Runner he bought with a milkshake already and it was fine after a fluid flush and radiator replacement.

4byrunner

Some people just have great luck of some parts going the extra mile.

As for experiencing the milkshake and getting away with only a slap on the wrist with a flush and a new radiator that's just good luck. Some people on top of a new radiator are having to replace/rebuild their transmission in some cases and that's big bucks for most of us!

On another note, opinions seem to vary on what's too cold for ATF temp and i think that's as good as it's going to get, just an opinion. I'm thinking about investing in a Scangauge II, seems worth it.

MAD 69

Does anyone know how much fluid I'll need to replace when I install? I can't seem to locate the ATF & coolant capacity.

4byrunner

Depends on how much ATF you will lose upon install. When you disconnect the lines you need to quickly plug them up to minimize fluid loss. Eyeball how much you lost and replace accordingly. If that doesn't cut it then simply check your AT dipstick while your truck is at operating temperature with engine running in park.

As far as coolant goes, are you going to flush all the coolant out of the engine? May as well do it since your at it. Get one gallon of pure coolant/ antifreeze and mix it with distilled water.

MAD 69

Sorry I couldn't edit my post last nite, my Runner has 165,000 miles and the previous owner put all new hoses and had all fluids flushed about 10,000 miles ago the only thing that hasn't been replaced is the radiator so I'm doing that. I just wanted to find out the capacity of the ATF - I realize I'm going to lose some on the change but I'm not sure if the correct fluid level is in there now.

Do you guys also change the rad cap and thermostat when changing radiators?should I go with a 170 or 180 degree thermostat?

badattitude

My 1999 actually uses 5 quarts of ATF when drianed from the pan. I purchase a 6pack (case).