Lotus Elan

Generic Parts List / Replacement Thermostat

PostPost by: prezoom » Tue Jan 29, 2019 4:47 pm

Back in the day, a brass discs with various sized holes were used in place of a thermostat, especially in cars that raced. These discs were commonly called blanking sleeves. It was believed that thermostats often failed and during a competition could cause engine failure. This in spite of the fact that millions of cars on the road had thermostats that never failed during their lifetime. The size of the hole was gauged to meet enough water flow through the radiator to keep the car from over heating on warm days. The downside was on cold days, some covering of the radiator was necessary to get the engine up to operating temperature. Oft times this meant covering a portion of the radiator for an early morning session and removing the covering for an afternoon race. I never understood this, as I wanted the engine to operate at its best peak power temperature along with its oil any time the car was on the track, and a thermostat was the best way to conrtol the engines temperature.
Rob Walker
1964 Sabra GT
1964 Elva Mk4T Coupe (awaiting restoration)
1965 Ford Falcon Ranchero, 302,AOD,9",rack and pinion,disc,etc,etc,etc
1954 Nash Healey LeMans Coupe

Owning a Lotus will get you off the couch
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PostPost by: billwill » Tue Jan 29, 2019 5:09 pm

chickenstock10k wrote:Why even put the the remains of the thermostat back in at all?

Possibly could not get it out with inadequate tools on a wet & windy night. 8)
Bill Williams

36/6725 S3 Coupe OGU108E Yellow over Black.
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