Engine cools when rev'ed
Thread Starter
|
Senior User
Joined: Mar 2004
Posts: 224
Likes: 1
From: Central Ohio
Engine cools when rev'ed
Weirdest thing. Replaced the radiator on Tuesday and everything appeared OK. Several heat up cool down cycles later, I notice that if I rev it (in the driveway or on the road) over about 2500 RPM, it will very quickly cool down. Temp guage isn't graduated but I'm guessing from about 200 degrees down to maybe 130. Heater blows noticably cooler also. Getting ready for a trip, weather is cold. Only things I can think of are air bubble in engine, head gasket making bubble in engine, or a thermostat in backwards. I haven't touched the thermostat and never noticed this before.
Out of desperation, I changed the thermostat (buried on a 4.2L in 15 degree weather), and it fixed it. Thermostat was in the right way, I've never seen one fail other than just stick.
What fixed this truck, did I just inadvertantly remove an air bubble that was stubborn? I'm baffled.
Mark Cantrell
Out of desperation, I changed the thermostat (buried on a 4.2L in 15 degree weather), and it fixed it. Thermostat was in the right way, I've never seen one fail other than just stick.
What fixed this truck, did I just inadvertantly remove an air bubble that was stubborn? I'm baffled.
Mark Cantrell
Thread
Thread Starter
Forum
Replies
Last Post
mramelbass
1983 - 2012 Ranger & B-Series
5
Aug 9, 2008 10:36 PM
luke_trash
1987 - 1996 F150 & Larger F-Series Trucks
19
Mar 8, 2005 02:09 PM
