Thread: New 1999 Grand Prix GTP owner

Hello all, I live near Grand Rapids, MI and have just bought a 1999 Grand Prix GTP. I am ecstatic. The car is in amazing shape, about 230,000 miles, and was great during my test drive. I'll be getting it from somewhere in Big Rapids next weekend, when I have the time to drive it home. The car seems to have been maintained very well, lots of documents and receipts, feel good about my purchase so far. (Pics later, I promise.)

I'm a do-it-yourself-er, not a master mechanic but I've got some experience working on 3800 Series II powered vehicles. This is my first of the supercharged variety, however. I'm joining this forum straight away because I know there are many of you with a lot of experience that could definitely give me good advice and educated opinions, which I certainly value. Always helps to have a knowledge base! And maybe I'll make some friends too.

Anyway, a few questions if you don't mind. This will eventually be my daily driver, but since I already have a dependable DD, I want to take my time and do the proper maintenance/precautionary work before putting it on the road. And if you were wondering, it has indeed been fixed as far as the L67 engine fire recall goes.

1. It has the original motor and trans. It never had an issue with the LIM gaskets, so they were never replaced. At this high mileage, should I go ahead and replace them?

2. If I decide to replace the LIM gaskets, what else should I do at the same time? (Lets assume that aside from regular oil changes etc., it hasn't had anything done for the last 50,000 miles)

3. What other parts should I probably replace either way? I'm guessing there is supercharger related parts that might need replacing that I'm not familiar with.

Thanks for your responses, guys. I should have plenty of time to get this car right where I want it. I'm not really interested in mods, 240hp is enough for me, but if you can suggest anything that might be smart to add while I've got the engine apart, go ahead and suggest it. I'm sure you have lots of great ideas.

131, if you know this engine go for it before it fails. there are 2 gaskets at the s/c that will leak coolant outside the motor and inside the motor (slowly enough that you will get a low coolant light every 2-3 months) replace these oem gaskets before they cause bearing and piston ring damage. zzp on 28th st at Byron Center Rd will have the gaskets you need. also for I think about 105.00 you can change the oil in the nosepeice and get new case bearings for the /sc.

Thank you both. I'll heed the forum rules next time! I figured an introduction plus a few questions wouldn't be an issue. My bad.