Overheated Big Block Chevy
07-28-2010, 10:45 PM
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Overheated Big Block Chevy
I've got a 82 Trans Am w/ a 468, Weiand Stealth intake, manifold filler neck, 160 thermostat, Jeg's 50 gpm electric water pump, 4 roll aluminum radiator w/ dual electric Hi output fans. This thing get "HOT" still in the garage. I've tried getting all the air out of the system with filling the radiator and the manifold with the filler neck. I'm using water first than wasting this Water Wetter addictive. I can start the engine, run for 5 - 10 minute and engine gets hot. The last time the upper radiator hose blew off the manifold filler neck at 170 deg.. I hope by put some RTV on the filler neck and tighten the radiator hose, I hope the thermostat will open and will be it. Have anyone had this problem before? or what can be my problem?Troubled Hot Rodder Shore17
09-10-2010, 06:54 PM
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Car: 1992 z28 Purple Haze
Engine: 5.7L Tuned Port Injection
Transmission: 700R4
Axle/Gears: 3.23 both spinning
Re: Overheated Big Block Chevy
468 as in a 454 bored? could be bored too much.... have you tried running it with no stat? The other thing is, are you sure the electric pump is working?
09-10-2010, 08:35 PM
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Car: 1982 Camaro z-28
Engine: 307
Transmission: th-350 with stage 2 shift kit
Axle/Gears: stock
Re: Overheated Big Block Chevy
I've heard of high volume water pumps, push so hard on the thermostat that it will not open. Try and drill some hole in your thermostat to relieve the pressure. I've seen it work 
09-10-2010, 10:19 PM
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Car: Currently have 3 cars and 1 truck.
Engine: 1970&92 Cams,both BBC's
Transmission: LS1 T-56 & PG w/vendor's
Axle/Gears: Built 10 bolt& 9inch w/spool
Re: Overheated Big Block Chevy
Have you checked your amp draw? I use a similar set up on mine, and found that I really needed an alternator and wiring that was up to the task to make the components work to their potential.
08-04-2012, 12:38 PM
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Re: Overheated Big Block Chevy
Have the same problem, have a BBC street machine, 185 thermostat, temp will gradually climb, stopping who knows where. electric water pump, 2 10" fans mounted in shroud pulling good air through radiator. Very frustrated.
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08-04-2012, 07:12 PM
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Car: 82 camaro z28
Engine: gen 6 454 carburated and cammed
Transmission: ls1 t56 trans
Axle/Gears: currie f9 with 3.70 gears
Re: Overheated Big Block Chevy
that weird i have a bbc gen 6 454 in my third gen using the stock radiator stock fan shroud with a mechanical fan stays cool all day at 190 even at 100 weather.i have a 185 autozone thermostat
08-04-2012, 07:20 PM
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Car: 89 Black IROC-Z convertible
Engine: 305 TBI
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08-04-2012, 07:25 PM
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Car: 82 camaro z28
Engine: gen 6 454 carburated and cammed
Transmission: ls1 t56 trans
Axle/Gears: currie f9 with 3.70 gears
Re: Overheated Big Block Chevy
here what it looks like.and i had dual aftermarket slim fans in one of my other cars 5.3 turbo they sucked i wire them to were they were on all the time still got hot i used the oe 4th gen dual fans worked wayyyyy better 
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