Bryan921SS

Currently I am getting the lower intake manifold gaskets replaced on my gf's 96 Cutlass Supreme...this is a known problem, there has been a lawsuit etc..it is all caused by the poor design of the engine, and the dex cool coolant that GM uses.

So do you think the LS4 will ever have this issue?? The dex cool in my MCSS has already turned to brown sludge once at about 22,000 miles.

After the warranties are up I plan on changing to the green stuff, but do you guys feel that the dex cool can hurt the gaskets in the LS4??

lovemyls4

No problem with Dex Cool it self. Its just not a 10 year 100K mile coolant like GM claims. If its maintained, flushed out every other year or so you'll be good.

Bryan921SS

Really?? I hope it's fixed then...


Everything I find online says that Dex Cool gets corrosive and eats the gaskets...

I changed the coolant every 1.5-2 years like clock work with my 96 Cutty.

She goes in Thursday for a LIM and UIM gasket replacement....

In the market for a Grand Prix GT....

lovemyls4

3800 series def. do have their gasket issues . . .

06 SS

we have wet manifolds?

Pauls325

iTrader: (1)

no there are no coolant passages in any of gms composite manis that i know of

Panther427

Well there sorta was with the LS1's but that was a "warmed/hot" throttle body, but we dont have the convention "wet" intake manifolds