curtybird

ok. I got a 89 2.8mfi firebird all stock. when i drive the temp stays fine. even when im out hotrodding around. but when get out ona highway or something the car starts to heat up. drivitemp about 180. and highway 220and up. mostly happens when i hae a constant idle ofabout 3100 Rs and up, then shell start heating up. its a slow heat but depends on how high my rpms are. any suggestion. would be great

87CamaroMan

Is your Fan kicking on.

curtybird

yeah my fan comes on. its hot wired to stay on all the time

Doward

Radiator needing a good flushing?

How's the air damn under there?

curtybird

ive done a flush since the problem started. and i dont know how to check the air dam

Doward

Make sure it's there, and not all bent/broken and all... look under the car, you'll see a 'fin' sticking down right under the radiator, about 5-6 inches.

curtybird

doyou mean the black"skirt" lookin peice. thats broken

Doward

Might need to replace that then. like 95% of the air to your radiator come from that, and I'll bet at high speed it's not deflecting enough air into the radiator.

Hit the local junkyard. All 3rd gen fbodies had them (Camaro or Firebird)

curtybird

so that 1 black plastic piece could cause that much problem huh. i never thought of that.

JoshDT91

iTrader: (1)

You can get that piece for cheap at a dealer if you cannot find it in a junk yard. Last time I checked on GMpartsdirect I think it was maybe $30 at most shipped. So you do have a place to go if you cannot find a used one. They call it a radiator baffle I think and it is the thing you might hear scraping the ground when you go up driveways and such.

curtybird

sweet guys. ill post up and let yall know what i find and do and what happens with it. thanks for everyones two cents