Thread: LIM Gasket's

the cleaner shouldn't hurt plastic or anything like that. when i had the GT i never cleaned the UIM, but it couldn't hurt. more specifically, use the brake clean to clean up the lower intake, the heads, the valve covers, that kinda thing. anywhere gaskets are going you want them oil free. i would always rub brake clean over the gasket surface of the UIM, but i'm sure it wouldn't hurt to get up in there and get any dirt out.

Well everything worked out well this weekend.

Flushed the coolant, changed out the gaskets, LIM, UIM or plenum, throttle body gasket, new valve cover gaskets, new temp sensor, new coolant elbows, cleaned the hell out of the lower intake, plenum and throttle body.

Improvements: GP runs really smooth and starts up with a slight turn. no more start and stall.

Now lets hope the coolant level stays where its suppose too.

Thank you all for your help.

Ok a little problem here.

It has been about 3500 miles since the new AC Delco LIM gasket and UIM gasket. I did every detail, ultra permatex copper in the 4 corners, clean the up everything, and torqued to spec in order.

Now I have white smoke out my tail pipe again and the coolant is disappearing inside the engine. Little less than 1/2 a qt a week.

Could it be coming in another place than the LIM? like the egr tube?

Does anyone have some insight on what I should do? Was thinking about taking it to a mechanic, how would they diagnose the issue? Anyone know of a recommended place in Orlando, Fl?