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V · 06-07-2006, 11:32 AM

yeah the build-up is just residue from over time and is nothing to really worry about, you can clean it and it'll be fine. and if you have it all apart to clean it, you may want to look into porting it even. If you do buy a new upper, keep in mind you need a 85-89 version for a MAF system and 90-92 is speed density. and BTW, you can do the thermostat on a tpi motor without removing any part of the intake, just the one U-shaped coolant line to the TB, i just did it on my monte last week.

06-07-2006, 11:32 AM	#4
V Stalker Join Date: Aug 2004 Posts: 12,082 iTrader: (12)	yeah the build-up is just residue from over time and is nothing to really worry about, you can clean it and it'll be fine. and if you have it all apart to clean it, you may want to look into porting it even. If you do buy a new upper, keep in mind you need a 85-89 version for a MAF system and 90-92 is speed density. and BTW, you can do the thermostat on a tpi motor without removing any part of the intake, just the one U-shaped coolant line to the TB, i just did it on my monte last week.