93 Accord engine temperature question

Hi All,

I have a 93 accord EX 4 door, 2.2 4 cyl engine. In 20 degrees F
outside, travelling at 55 mph, the engine temperature guage moves up to
about the middle. However, when I turn on the heater fan to warm the
cabin, the temp guage falls to about 10-20%. Anyone know what the
issue is here? Bad thermostat, possibly stuck open? Air in my
collant? Any other other possibility?

 

i'd suspect thermostat being too open. replacing a 12/13 year old
thermostat is a good idea. use o.e.m. and get the gasket too.

 

no need for gasket as honda use oring and unless damaged it should be good.

 

not so. the rubber degrades over time. remove 12 year old gasket,
wash, leave out on the bench overnight and go look at it the following
day. then you'll see why it should be replaced. it's badly cracked
because the rubber has lost it's integrity.

 

Well I bought a new thermostat and a gasket...About $10.00 total for a
new stant oe thermostat and rubber O ring Advance Auto. Plan to
install in the next few days. I'll post an update when finished.

 

The O-ring is very, very cheap and may even come with an OEM thermostat in
some cases.

It MUST be replaced for a correct seal. The aperture collects corrosion
that distorts the O-ring and must be scraped out with a non-metallic tool
before installing the new one.

For best results, the thermostat should be replaced every five years.

 

Hi again,

Finally got around to replacing the thermostat and O-ring last night.
Good news, it fixed my problem. Engine now warms up and stays at a
constsnt temp, even when I turn the heater fan on! Looking at the old
thermostat, it looks like nothing is wrong with it. I did not test is
in a pan of water or anything, and probobly won't as long as the new
one corrected the problem. What wears out in an old thermostat if
nothing appears broken or stuck?

Thanks all.

 

too hot: wax capsule slowly leaks so can't open fully.
too cold: valve sticks open because no longer slides smoothly.