Originally Posted by Marky Dissod on May 25th 2013 @ 01:08 PM
Pretty much what jcarenza said.
96 L99s had EITHER 2.93 (civilian standard), or 3.23 (civilian option, 9C1 standard).
With an LT1, an external transmission cooler is pretty much mandatory. You can probably do better than OEM for less money.
It's a great idea to swap the oil cooler delete adapter from the L99 to the LT1; it's a potential source for leaks and coolant contamination. If you drive very hard, often, you may want to consider 0W30, 5W30, 0W40, or 5W40 synthetic motor oils.
on the engine oil cooler. Not sure why so many are against these?
The only real leak prone area is the rubber hoses on the hard lines. This is an easy fix with some new connectors and different hose of your choice.
I added the external 9c1 cooler which bypasses the rad cooler and mounts up front next to the ext. tranny cooler. I think it helps to balance the look of the front a little with both coolers there.
My car also did not have the ext. Trans cooler and I added that as well using all stock GM parts.
Not so much 'against', just can't think of a reason to be 'for', unless vehicle is used as hard or harder than a police pursuit vehicle/taxi/etc.
With the OEM fan-on settings, yea, I could see an external oil cooler being a necessity, especially if using cheap 'dino-press' motor oil for extended service intervals, driving hard for extended periods, etc.
I use 0W40 Group4 synth and change it every 5000, the lowest reasonably possible fan-on settings regardless which thermostat I'm using, etc, and while I do drive like a d!ck often, I'm getting better at using the gas & brake less, and coasting more.
The vast majority of people here still using an external motor oil cooler would be wise to repurpose it as an additional external transmission oil cooler, as the transmission would get more longevity/durability out of it than the engine.
1g1bl82p7rr127841 … Rust In Pieces, Rest In Peace …
They are NOT Lying to You
You are NOT Lying to Yourself
You are Being Lied to - BY Your Self
… Alone aka The Last Psychiatrist