02 Malibu LS leaking coolant from reservoir - Chevrolet Forum - Chevy Enthusiasts Forums

Go Back  Chevrolet Forum - Chevy Enthusiasts Forums > Current Chevrolet Car Models > Malibu
Reload this Page >

02 Malibu LS leaking coolant from reservoir

Malibu Another long running GM name, the Malibu has overcome many changes to be one of the top mid size sedans heading into its eight generation.

Chevrolet Malibu
This area is for FWD models 1997 and newer
Platform: N-, Epsilon, Epsilon II.
Old July 24th, 2015, 4:47 PM
How-Tos on this Topic
Last edit by: IB Advertising
See related guides and technical advice from our community experts:

Browse all: Engine and Powertrian
Print Wikipost

02 Malibu LS leaking coolant from reservoir

Reply

 
 
 
Old May 21st, 2011, 8:15 PM
  #1  
CF Beginner
Thread Starter
 
Join Date: May 2011
Posts: 5
Default 02 Malibu LS leaking coolant from reservoir

I have an 02 malibu that has been leaking antifreeze out of the reservoir since we purchased it. We have replaced the radiator, the thermostat, water pump, head gaskets, and lower intake manifold gaskets. The fans turn on okay and it cools down but at times it is still leaking dexcool out of the reservoir tank. Does anyone know what else there could be that I might need to replace?
Chevygurl87 is offline  
Reply With Quote
Old May 21st, 2011, 8:53 PM
  #2  
CF Veteran
 
Join Date: Mar 2011
Posts: 1,709
Default

Welcome to the forum. You said you replaced the head gaskets but did you have the heads sent out to be checked? Reuse torque-to-yield bolts by any chance? Check the spark plugs for telltale signs of coolant leak into the combustion chamber?
EinST is offline  
Reply With Quote
Old May 22nd, 2011, 9:11 AM
  #3  
CF Beginner
Thread Starter
 
Join Date: May 2011
Posts: 5
Default

My boyfriend is in the Auto Repair program at our local college and he had his teacher check out the heads and he told us they were not cracked. We didn't reuse the bolts because the head gasket kit we bought came with the bolts. I can have him check the spark plugs but is there anything else it could possibly be?
Chevygurl87 is offline  
Reply With Quote
Old May 22nd, 2011, 7:30 PM
  #4  
CF Veteran
 
Join Date: Mar 2011
Posts: 1,709
Default

I can't think of anything unless something was botched. Cooling system problems shouldn't be that difficult to figure out. Just let him follow diagnostic procedures in the service manuals and double-check everything.
EinST is offline  
Reply With Quote
Old May 26th, 2011, 7:09 PM
  #5  
CF Junior Member
 
Join Date: Mar 2011
Location: Virginia
Posts: 63
Default

If you're losing coolant FROM the reservoir, it might have a fine crack.
Tyger is offline  
Reply With Quote
Old May 28th, 2011, 12:07 PM
  #6  
CF Beginner
 
Join Date: May 2011
Posts: 1
Default

the maxx i just got had the same problem. would leak from the reservoir. changed the cap. not sure on the 02's but the 07 cap has O rings that let the overflow through the middle/bottom of the tank. i didn't think it would work, thought there was a crack, but that was the first and cheapest step and it worked. good luck
kettlman is offline  
Reply With Quote
Old October 24th, 2014, 8:14 PM
  #7  
CF Beginner
 
Join Date: Oct 2014
Posts: 1
Default Temperature running high, coolant reservoir leaks when filled to cold fill line

We have replaced the head gasket, thermostat, coolant temperature sensor, the reservoir, and hoses. The temperature, once erratic and bouncy, now shows a steady temperature of 210ish after only minutes of running with occasional illumination of the coolant low light.

For a test, I filled the reservoir to the cold fill line, started her up, and observed. The upper part of the reservoir tank slowly drains and the lower portion slowly fills with coolant. The coolant rises above the fill line until the lower portion is full, then overflows, spilling out.

Then the lower portion drains into the system, causing the level to dip below the coolant sensor, causing the illumination of the light, then slowly fills, until the light goes out and the level rests below the fill line. The upper portion remains empty. Then the cycle continues and the quantity of coolant remains constant with no more loss in the system, for days, weeks, and months.

The temp gauge stays constant with an occasional drop when the coolant in the lower tank drains into the system. Both fans run constantly when above the normal 190 mark. Any ideas?
Browser is offline  
Reply With Quote
 
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
ifish2
General Tech
6
August 27th, 2017 2:50 PM
malibudriver84
Malibu
5
January 2nd, 2014 10:21 AM
otto11
Silverado & Fullsize Pick-ups
2
December 28th, 2013 11:53 AM
alafurge
New Member Welcome Area
4
May 23rd, 2012 8:41 AM


Thread Tools
Search this Thread
Quick Reply: 02 Malibu LS leaking coolant from reservoir


Sponsors

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

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.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: