Help Please!

**Monroe8822** · 07-14-2013

Okay so I have a 2000 Grand prix gt that has been converted over to a gtp. My only problem is I keep blowing motors. I'm just blew up the third motor yesterday and I'm running out of resources fast. The only thing I have done the same to each motor is the supercharger. Could there be something wrong with the supercharger that is blowing the motors up? It's running stock pulley and each motor has blown up under boost. I'm out of ideas here. Any info would be greatly appreciated. Thanks In advance.

**Matt Palm** · 07-14-2013

are you running 91 oct minimum

**Monroe8822** · 07-14-2013

Yes

**vandezand** · 07-14-2013

what condition are the motors in when you put them in? Are they high mileage?

**Monroe8822** · 07-14-2013

The first motor I put in had 80,000 After That one blew up I top swapped my other motor With 160K Bad Idea I know but I needed my car. And the third one had 130K But It had been taken care of

**01GrandPrixTURBOGT** · 07-14-2013

Do you have a scan gauge to see if your running lean or have knock?

**Monroe8822** · 07-14-2013

The computer wasn't sending any codes at all. If it helps any All three have spun rod bearings.

**Scottydoggs** · 07-14-2013

did you have your pcm tuned for a top swap?

**vandezand** · 07-14-2013

Were you losing coolant into the oil?

**Monroe8822** · 07-14-2013

Nope Oil didn't have anything in it except metal shavings from the bearings

**02NavyBlue** · 07-14-2013

So all 3 motors spun rod bearings? What are the odds of that? What oil were you running, and a dumb question maybe but was it always in the safe range? And was the temp always in a normal range?

**Monroe8822** · 07-15-2013

I was running 10w-30 oil. It was in the right range. And the motor was at normal operating temp. For all three motors

**BillBoost37** · 07-15-2013

Who tuned your pcm for the SC motor?

**Scottydoggs** · 07-15-2013

did you get the pcm tuned? or did you switch the pcm? or just wired it up and make it run?

**Austins01GP** · 07-15-2013

http://www.grandprixforums.net/top-s...info-7763.html

^ cant hurt to read through this and make sure you have all the necessary items and swapping done