Main IndexAuto Repair Home Search Posts SEARCH
Who's Online WHO'S
Log in LOG

Engine won't come up to temperature

  Email This Post

Anonymous Poster

Apr 8, 2009, 11:14 PM

Post #1 of 2 (1381 views)
Engine won't come up to temperature Sign In

95 GMC, 1/2 ton, 4wd, 5.7L, 160K miles. The temp gage has been reading ~170 def F for some time, going on over a year. I don't recall it suddenly going down, but approx a year ago I replaced the thermostat with no change, and then changed the gage temp sending unit with no change. At that point I thought I had a bad gage and just lived with it. With summer approaching I decided to get an aftermarket gage that I propped up on my dashboard. I was surprised to see that it matches the dash gage. So if I have a good 195deg thermostat, how can the engine not be getting to 195? No codes have been thrown.

Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Apr 9, 2009, 10:07 AM

Post #2 of 2 (1374 views)
Re: Engine won't come up to temperature [In reply to] Sign In

If the 170F is the true and steady operating temp it really can only be blamed on the thermostat. That's about what I'd expect to see if a 160F thermostat was installed - almost no vehicles should be using those but they are sold everywhere. Might even be a mistake in manufacture.

Once at operating temp the reading should stay very steady. If it's fluctuating now and not overheating it may be leaking past the thermostat somehow. Upper hose should remain cold from a cold start and stay cold for several minutes. If there's any temp increase noticed early at the radiator end the thermostat isn't working properly.

If you can take a temp reading right at the housing of a thermostat is should read pretty close to it's rating once warmed up,

Long retired now

Engine won't come up to temperature

  Email This Post

Latest Forum Post

2002 suzuki xl7, 2.7, 4x4, a/c, a/t, 192,000 miles Wonderful car, we just inheri...

Hi everyone is it hard to replace a blower motor on Volvo C70 2007

I am having a little trouble tracking the issue my 2003 Malibu is currently havi...

1994 gmc 1500 4.3l truck has in ignition problem. none. the ecm computor has be...

So I have a 02 f150, I bought it at an auction and I've had it for awhile, nothi...

I have a 2005 Honda Civic. It has 99,000 miles on it. About three and a half wee...

Feed Button

Automotive Forum Categories
AC Auto Repair
Auto Body Repair
Auto Insurance
Automotive Repair
Automotive Wiring
Automotive World
Brake Systems
Car Care Tips
Car Racing
Car Shows and Events
Car Stereo Repair
Car Troubleshooting
Engine and Car Noises
Engine Fault Codes
Engine Troubleshooting
Exhaust System Repair
Gasoline and Motor Oils
General Discussions
Motor Vehicle Inspection
Motorcycle ATV Repairs
Motorcycle Body Repair
Motorcycle Clutch Repair
Motorcycle Engine Repair
Motorcycle Repair
Motorcycle Seat Repair
Remote Control Cars
Steering and Suspension
The Bargin Bin
Traffic Ticket Help
Tricks of the Trade
Truck Repair
Truck Repair Advice
Truck Engine Repair
Truck Suspension Repair
Car Forum - Sitemap

Search for (options) Privacy

web statistics