need heater help
Thread Starter
Junior Member
Joined: Apr 2010
Posts: 27
Likes: 0
Car: 1987 Trans am
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: GM 10 bolt
need heater help
have an 87 TA 305 TPI. One day heater works fine, next day fan blows normal just air stays cool. Engine sounds fine,temp. stays in normal range.
Any ideas?
Any ideas?
Supreme Member
iTrader: (1)
Joined: Dec 2006
Posts: 2,403
Likes: 4
From: ms. gulf coast
Car: 91 R/S , 89 dodge p/u
Engine: L31 GM crate re-cammed , 318
Transmission: T-5 , 4 speed auto
Axle/Gears: 3.42 , ?
Re: need heater help
sounds like a heater diverter valve . ck. the vacuum lines going to it . it could also be the valve it self . easy to change , cheap , ready available , G.M. used the same ones on many models/years . good luck .
Member
Joined: Jan 2008
Posts: 109
Likes: 2
From: Camarillo, California
Car: 1990 RS Camaro
Engine: 1990 305 tbi lo3
Transmission: 700R4
Re: need heater help
any coolant smell in the cabin? syrup? wet floor on passenger side(heater core) if no, make sure about diverter, and also look behind the heater/ac box in dash for loose broken or disconnected vac lines
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