Drilling Holes in Thermostat?
01-10-2007, 06:07 AM
#51
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Car: 1987 1SICIROC.....1999 TransAm
Engine: 385 HSR.....LS1
Transmission: 700R4 with Midwest 3400 2.4str...M6
Axle/Gears: SLP Zexel Posi unit 3.42's...3.73's
well thats good to hear......hey, what part# temp switch did you go with? I still need to get one and I want to to work with my 180 stat...
thanks
thanks
01-13-2007, 06:23 PM
#52
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Car: 88' Camaro IROC-Z
Engine: 383ci TPI
Transmission: 700R4
Axle/Gears: stock
Some people have it, others don't. My Camaro never had an issue like that. However, my Caprice does. Consider it a flaw of design in the conventional cooling system where coolant hits the block, then goes to the heads with already heated coolant.
I can watch my Caprice's gauge climb up to 220-230 before it will drop and I have a 180° thermostat in it.
I gave the Camaro a surge tank to alleviate those air bubbles, so we'll see how that turns out.
I can watch my Caprice's gauge climb up to 220-230 before it will drop and I have a 180° thermostat in it.
I gave the Camaro a surge tank to alleviate those air bubbles, so we'll see how that turns out.
01-15-2007, 04:03 PM
#53
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Engine: '85 Monte SS L69 305
Transmission: TH 200-4R
Axle/Gears: 3.23
I've seen european standard stats with a tiny 0.04 hole in them, so that's obviously just to let air pockets through. Air is very bad at transferring heat, and still-standing water takes time to heat, so getting rid of the air and getting the water moving will let the stat feel the real temp of the engine and open quickly instead of sitting in an isolated pocket of air and water thereby rising slower in temperature than the heads, opening too late, causing an overshoot in temp..
I wouldn't rely on a standard guage for accurate temperature indication btw..
I wouldn't rely on a standard guage for accurate temperature indication btw..
01-17-2007, 10:45 AM
#54
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Car: 89 z
Engine: Chevy 383
Transmission: 700R4
Axle/Gears: 9 bolt 3.73
I'll tell you what made me a believer. Ever notice that when you change the coolant and introduce air into the block the first time you start the engine the temp goes thru the roof for a minute and scares the hell out of you? And then you kill it real fast cause you think the thermostat aint gonna open? And you do this 2 or 3 times until the stat finally opens and lets the air and steam out. Been there done that dozens of times but NEVER on a car with a drilled thermostat.
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