Me and a buddy are having a debate. i want to see whats up. he said in 89 the performance package that gave you dual cats also came with the 3.27 gears and the oil cooler. Now i was under the impression and Drew also said that all L98 cars came with oil coolers. My buddy says that his 89 L98 did NOT have a oil cooler. so whats up. could you delete the oil cooler or whats up. he said his options sheet says something about not having an oil cooler too.

 

i have had my 89 L98 since new, it has 2.77,single cat and no oil cooler. hope this helps.

 

My 89 L98 came with 2.77's and no oil cooler. It coincidentally also came with a 115 speedo, all from the factory.

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1989 IROC-Z 5.7L
NOS 5151 150HP kit
ProBuilt 700R4, PI Vigilante 2800 stall lockup
Baer Brakes 12" Sport System

 

Thats interesting, I've never read anything that said the oil cooler was optional. Anyone have any documentation to back this up?

 

Another '89 2.77 single cat here w/o an oil cooler.

 

I have an 89 L98, with 2.77, I dunno if I have an oil cooler, I think I only have one cat, not sure, its the only one that keeps rattling.

 

Its interesting that these cars are showing up without the oil cooler, as everything I've seen indicates it was required with the L98. I'd still like to see some documentation that proves this. Either SPID sheets, or dealer order forms, or window stickers that indicate these cars came this way from the factory. I have sales information and cars to back up that the oil cooler was required with the L98 in 87 and 91.

 

Mine has 2.77s with oil cooler.

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88 IROC-Z,L98 350 TPI, 700R-4 Tranny 2.77, K&N Filters, 126K Miles runs great.

 

very interesting. well chalk this up to another "hey why the heck did gm do this" mystery. strange stuff.

 

2.77's here and an oil cooler in an '89

 

My son has a 88 IROC single cat with 2.77 and oil cooler.When we built the 383 we did not put it back on either.

 

Mike Metzler's CD (82-91 Parts and Illustration Cat) shows that LB9s and L98s from 87 to 91 were 'supposed' to have the oil cooler. Dontcha love GM.

JamesC

 

Drew, I am looking at four '89 IROC build sheets. All are equipped with the L98 engine GH3 2.77 axle and G80 posi. None of these cars have the KC4 engine oil cooler option. Any questions you can email me. David

 

ah...someone finally proved me right

from my knowledge in 89 since you couldn't buy a Z28 anymore (you bought the IROC) GM had to have a "package" to buy like they did in 85-86 when they still had the Z28 and the "IROC" was the package

from what i know the package was a "performance" package added on to buying a IROC which included:

an oil cooler
dual cats
3.27 rear gears

but who knows what GM did

 

The sales brochures for the 88 and 89 camaro would probably detail what was required and what came standard with the L98, but I don't have anything between 87 and 91 in my collection.

 

I have an 89 IROC-Z, with 2.77 rear gears, i don't know if I have an oil cooler, I believe I only have one cat (like I said its the only one that rattles). But you're saying that the IROC-Z was a package on top of a Z28 in earlier years (which it was), so what you're saying is that my car is not an IROC-Z, but a Z28, with IROC-Z written on it?


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6 months and counting... the search for a Camaro goes on...
... and now finally I got one, hell yeah!!!

Would you like it if the next generation of kids, start sayin daddy, daddy buy me a fast and powerful car, like a Honda Insight?! NO!
Muscle is muscle, stop this fighting between american cars, we must join and defeat the world!

1989 IROC-Z Camaro
5.7 Ltr
Ram Air
Cat-back Flowmasters
K&N Filters
-my first car, my dream now reality

 

The next question that comes up is this... do these cars (88-90 Iroc's with bad gears, no oil cooler) have 16" wheels *stock of course* and the wonderbar?

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Drew
predatorman@hotmail.com
83 Camaro 5.0L *1995-98*
87 Iroc 5.7L
91 Formula 5.7L 14.3@98mph
91 RS Convertible 5.0L
91 Firebird 3.1L 17.00@82mph *Gtech*
92 S10 2.8L
98 Grand Am GT 3100
Parts for sale

 

hummm....maybe Gm decided that it was not neccisary and pulled it off the cars thinking people would not know and pocketed the cash.

 

Drew,my 2.77 89 iroc that i purchased brand new in 1989, has as follows L98,2.77,single cat,no oil cooler,stock 16" wheels,wonderbar,the car is NOT a G92 however.i wish it was! hope this helps.

 

Drew, you just described my car.

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1989 IROC-Z 5.7L
NOS 5151 150HP kit
ProBuilt 700R4, PI Vigilante 2800 stall lockup
Baer Brakes 12" Sport System