General 1967-2002 F-Body Tech For general F-Body discussion that does not fit in any other forum.
For F-Body Technical/Information Discussion ONLY

97 Formula OverHeating

Old 07-14-2015, 02:15 AM
Registered User
Thread Starter
Join Date: Jul 2015
Posts: 1
Question 97 Formula OverHeating

I have a 97, Lt1 formula. I have owned this car for 7 years.

I have replaced the radiator and cap because it was leaking and replace the thermostat about a year ago. Both my fans work at low speed and high speed with and without a/c on. Alternator is charging good, and has lots of power.

In the winter i dont have any problems at all with it but as soon as the temp outside hits 90's, it starts getting hot enough to boil over in the overflow if driven in stop and go trafic for more than an hour. In the summer time i pull the thermostat out to help with the problem but this summer it seems not to be helping. On the highway it does not heat up as fast, but will get to hot for comfort.

I have not replaced the waterpump, but I have not convenced myself yet that is the problem. When checking the temps at the radiator in/out, both are very close to the same (230-240). To me if the water pump was bad the temp would be LOTs colder on the out side due to low flow.

I am a good mechanic I think, we all have that one and this is mine. I have PSI and Block checked, it came back good, no water in the oil and no water in the exhaust. I do not loose coolant unless i let my wife drive it to work, and when she gets home it will be boiling out the overflow. I also have bleed the air out of the system.
MikeWhitener is offline  
Old 07-14-2015, 07:56 AM
Registered User
maybe2fast's Avatar
Join Date: Nov 2006
Location: Commerce, MI
Posts: 886
Re: 97 Formula OverHeating

LT1 temperature (without a EWP) fluxuate alot, and the highspeed fans will not come on til 235* so you have not described an overheating condition.

Check the airscoop passageway in the nose and make sure the passage is clear and nothing is in there or plastic shields have blocked the air flow.

Put the thermostat back in! The thermostat among other things allows the coolant in the radiator to have a good amount of cool down time, and regulates cooling. Also without the t-stat the engine can over cool and dump more fuel into the engine.
maybe2fast is offline  
Old 07-23-2015, 02:50 PM
Registered User
Join Date: Aug 2001
Location: Jacksonville,fla
Posts: 1,984
Re: 97 Formula OverHeating

You also may want to check your coupler that goes from the block to the WP. Had a friend find his to be stripped.
MEAN LT1 is offline  
Old 08-02-2015, 11:56 AM
Registered User
ZZ's Avatar
Join Date: Jul 2001
Location: whogivesadamn PA
Posts: 210
Re: 97 Formula OverHeating

Also check for coolant flow coming from the steam pipe. When it's cool, take the cap off and look down the neck where the return from the line feeds in while it's running and confirm it's not blocked.
ZZ is offline  
Old 08-02-2015, 06:17 PM
Super Moderator
Injuneer's Avatar
Join Date: Nov 1998
Location: Hell was full so they sent me to NJ
Posts: 67,229
Re: 97 Formula OverHeating

Before spending any more time trying to help, let's wait until he comes back to the site and acknowledges the responses he already has. He posted on 7/14, signed off two minutes later, and never came back to the site and signed in again.
Injuneer is offline  
Related Topics
Thread Starter
Last Post
Formula Steve
LT1 Based Engine Tech
06-02-2016 05:40 PM
93 RedBird
Fuel and Ignition
11-15-2015 08:24 AM
LT1 Based Engine Tech
10-12-2015 04:19 PM
LS1 Based Engine Tech
09-09-2015 07:06 PM
South Atlantic
09-03-2015 08:47 PM

Thread Tools
Search this Thread
Quick Reply: 97 Formula OverHeating

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.