Low Engine Coolant 2005 Pontiac Montana - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Pontiac When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made.

Reply
 
 
 
Thread Tools Search this Thread
Old 03-01-2016, 10:14 AM   #1
Junior Member
Thread Starter
 
Join Date: Mar 2016
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
robertslance8@gmai is on a distinguished road
Cool Low Engine Coolant 2005 Pontiac Montana

Starting to get a low engine coolant warning. The needle will go all the way to hot it tells me that the AC is disabled for reasons. The engine will run slow then all of a sudden the needle will go back to normal then the engine runs fine again.

Antifreeze is good, there is not water in the oil, all the relays check good. Just Curious to see if anyone else has had this problem.
robertslance8@gmai is offline   Reply With Quote
Old 03-02-2016, 02:59 PM   #2
Senior Member

Certified GM nut
 
Tech II's Avatar
 
Join Date: Feb 2014
Location: Worcester, Ma.
Posts: 2,143
Thanked 779 Times in 608 Posts
Tech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond repute
Default

Starting to get a low engine coolant warning. The needle will go all the way to hot it tells me that the AC is disabled for reasons.


AC is not disabled(coolant fan is probably running, but not having an effect).......you have a coolant leak(low coolant light is on).......creates an air pocket, inhibiting coolant flow through the engine, causing it to overheat.....if the air pocket "pushes through", then temp returns to normal.....

Vehicle should not be driven this way.....could lead to more expensive head gasket problem......

Should be immediately be diagnosed and repaired.....
Tech II is offline   Reply With Quote
Old 03-02-2016, 06:18 PM   #3
Senior Member

True Car Nut
 
2kg4u's Avatar
 
Join Date: Sep 2006
Location: Windsor, Ontario / Detroit, Michigan
Posts: 4,804
Thanked 220 Times in 181 Posts
2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of2kg4u has much to be proud of
Default

I agree. Fluctuations you are seeing are due to air pockets in the coolant. You could bleed the air out and replace the missing coolant, but that is not dealing with the underlying issue of why/where you are losing coolant.
2kg4u is offline   Reply With Quote
Old 03-03-2016, 01:59 PM   #4
Senior Member

Certified GM nut
 
Tech II's Avatar
 
Join Date: Feb 2014
Location: Worcester, Ma.
Posts: 2,143
Thanked 779 Times in 608 Posts
Tech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond reputeTech II has a reputation beyond repute
Default

Is this the 3.5 engine? I think this has the redesigned lower intake gaskets....

Hate to say it, but if you can't find an "external" leak, like a w/p, hose, etc., then it'* internal, and could be a head gasket......do you notice an initial misfire on startup?

You have to find the source of the leak, otherwise you will be making unnecessary repairs....
Tech II is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Need help finding oxygen sensor on 2005 Montana chrisgblues Pontiac 5 10-05-2015 01:25 PM
Montana with 3.4 LA1 coolant leaking front cover LittleNo Pontiac 2 08-03-2015 01:26 PM
2005 Pontiac Montana hard start when hot Danthurs Pontiac 68 05-06-2012 03:31 PM
Low coolant sensor on 2005 Bonneville GXP charliepugh 2000-2005 1 03-03-2012 08:54 AM
2005 Pontiac Montana 6-Button Remote coldfusion11 Pontiac 1 10-28-2011 03:54 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 02:50 AM.


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 Amazon.com and affiliated sites.