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Join Date: Nov 2001
Location: SoCal
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engine thermostat - what temp should it open at?
I tested the thermostat that's mounted on the engine block and it opened at ~192°. What temperature should it open at? Thanks!
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Jim R. |
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05-31-2003, 05:56 AM
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Back in the saddle again
Join Date: Oct 2001
Location: Central TX west of Houston
Posts: 55,965
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yeah, I'm curious too.
I bet that's correct, because that's also what the external opens at, so if the internal cooler doesn't keep it at that temp then the external (hopefully) will.
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Steve '08 Boxster RS60 Spyder #0099/1960 - never named a car before, but this is Charlotte. '88 targa  SOLD 2004 - gone but not forgotten
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05-31-2003, 06:43 AM
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I would've expected that it would open at a lower temp. Then, if the internal cooler can't keep up, then the external thermostat would open at a somewhat higher temp and let oil flow through the aux. cooler.
When GIBSON did this test, he had one open at 168°. I would think this is more reasonable.
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Jim R. |
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05-31-2003, 06:54 AM
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Location: TX USA
Posts: 9,804
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Jim,
I suggest soaking the thermostat overnight in Berryman's B-12 Chemtool to loosen/remove any varnish or deposits ... heated ultrasonic bath at 120° F would be ideal. Then try a retest to see if the opening temp has changed. I suspect that30 years in a used oil bath can leave some serious varnish deposits.
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Warren Hall, Jr. 1973 911S Targa ... 'Annie' 1968 340S Barracuda ... 'Rolling Thunder' |
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05-31-2003, 09:12 AM
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I'll give that a try, Warren. I'd hate to have to replace it as those t-stats are pricey. Thanks!
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Jim R. |
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05-31-2003, 10:30 AM
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Location: Cornwall-on-Hudson, New York, USA
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My external thermostat opens at about an indicated 180 (on a numerical gauge), and this is well after the internal thermostat has opened and is already circulating hot oil.
Stephan
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Stephan Wilkinson '83 911SC Gold-Plated Porsche '04 replacement Boxster |
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05-31-2003, 01:02 PM
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I just found the spec...182°. I'm soaking it in Berryman's B-12 Chemtool and will re-test it tomorrow morning.
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Jim R. |
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05-31-2003, 01:05 PM
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It's still opening in the low to mid 190°s. I guess I need to open my wallet up some more.
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Jim R. |
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06-01-2003, 06:53 AM
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Location: Los Angeles
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Anybody has picture of the thermostate and location?
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Caliber 1987 911 Cabriolet |
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06-05-2003, 02:39 PM
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