All times are UTC - 6 hours [ DST ]




Ask A Question Reply   
Author Message
 

contributions: 1
Just changed the head gasket on the car. 3.4, ran fine, actually great for a few days, now when I am in idle, the temp will go up to 240 then back down as i drive...fan does kick on.


Share on FacebookShare on DiggShare on DeliciousShare on TechnoratiShare on TumblrShare on Google+
   
Reply with quote  
* Search   
 
User avatar

contributions: 2244
Images: 37
Location: Oregon
you should use a scanner and watch the engine temp and the coolant fan (or fans) for their operation. see if the fan comes on at the right temp and also look to see if the high fan comes on if the low fan is unable to bring the temp down. If the engine temp comes down to normal while driving and the fans come on at the right temperature I would look at the circulation for a problem. Since the only thing that changes when you are driving is the water pump speed and air being forced through the radiator.

Try letting the engine get hot at idle like you say it does (duplicate the conditions as it happens when you drive and come to a stop) When the temperature gets higher than normal (don't let it get all the way to over heat but let it get hot) put the trans in neutral or park and rev the rpm's up to 2000. Does the temperature go down?

if the temp goes down then I would look at a radiator that may be getting plugged up or a water pump not pushing enough coolant.


   
Reply with quote  
 
The cooling system on the 3.4 has a "burping valve" you more than likely have air trapped in your system. The valve is located on the top of the engine. Follow the radiator hose that goes along the top of the engine. you will locate the valve on the engine end of the hose


   
Reply with quote  
Ask A Question Reply   

   Similar Topics   Author   Replies   Views   Most Recent 
New Articles View the first 1995 Grand Prix Gtp won't idle

in Pontiac Grand Prix

Pipeboy

1

1579

Wed Apr 13, 2016 12:46 am

carriedi View the latest

New Articles View the first 2002, 3.1, Grand Prix, ROUGH/SURGING idle at a stop

in Pontiac Grand Prix

goodwinbj

1

1129

Mon Jul 31, 2017 10:02 pm

carriedi View the latest

New Articles View the first 3500 rpm Idle

in Pontiac Grand Prix

Coldbeerkid

2

555

Fri Mar 02, 2018 9:23 pm

carriedi View the latest

New Articles View the first 94 grand am headlight problem help

in Pontiac Grand Am

Karie

2

2421

Sat Nov 21, 2015 3:08 pm

Karie View the latest

New Articles View the first 2003 Pontiac Grand AM V6 3.4 Overheating

in Pontiac Grand Am

ronrw2b2

4

3109

Fri Aug 24, 2018 3:23 pm

richpart View the latest

New Articles View the first Attachment(s) Pontiac grand prix low oil level light

in Pontiac Grand Prix

rockin49

1

2763

Tue Oct 27, 2015 10:14 am

carriedi View the latest

New Articles View the first 89 grand prix ignition coil removal

in Pontiac Grand Prix

Benwagner25

1

660

Sun May 20, 2018 7:10 pm

carriedi View the latest


All times are UTC - 6 hours [ DST ]



Search for:
Jump to:  
Contact Us