Heating and cooling

BOB HENRY

MEMBER
1988 CHEVROLET S-10
6 CYL
4WD
AUTOMATIC
93,000 MILES

I have a 1988 chevy s10 blazer with a 195 Thermostat in it and it runs at 135. So I went and got another 195 Thermostat and put it in and it overheats

Thursday, January 6th, 2011 AT 10:39 PM

5 Replies

SATURNTECH9

MECHANIC
30,869 POSTS

So does both your upper and lower radiator hose's get hot?When it's running hot is your fan clutch engaging the fan blade?

SPONSORED LINKS

Was this

answer

helpful?

Yes

No

Thursday, January 6th, 2011 AT 10:54 PM

BOB HENRY

MEMBER
3 POSTS

The lower hose gets hot but the top on don't with the new thermostat in it. When the old thermostat in it they both get hot but it runs cool

Was this

answer

helpful?

Yes

No

Thursday, January 6th, 2011 AT 11:30 PM

SATURNTECH9

MECHANIC
30,869 POSTS

With the thermostat working correctly they should both get hot. So with the second thermostat it sound's like the thermostat isn't opening. With the first thermostat was that the one you changed because of the problem of it running so cool?Or was that a new one that caused a new problem?

Was this

answer

helpful?

Yes

No

Friday, January 7th, 2011 AT 6:58 PM

BOB HENRY

MEMBER
3 POSTS

Today I went and got a 180 Thermostat and put it in and it still over heated. With the 180 thermostat in it the top hose is cold until you turn off the motor and let it sit about 5 min. And then it gets warm. But the thermostat wont open. I boiled it and it open around 185-190 so I know that its working but it wont open when its in the car

Was this

answer

helpful?

Yes

No

Friday, January 7th, 2011 AT 8:32 PM

SATURNTECH9

MECHANIC
30,869 POSTS

That's strange since you said the other thermostat had flow and both hose's got hot so it look's like it's not a flow issue.I know this is a stupid question but are you sure the thermostat is in right?Since you said the other one flowed and this one didn't and you tested it and it opened.