98' Blazer Constantly overheating. Out of ideas - Subaru Enthusiasts Car Club of the Sierras

100_Percent_Juice · 2010-07-12, 08:03 PM

My sister has a 98 Blazer(the small one) and it has a problem with overheating. I am waiting for a list from her but, I do know that the following items have been replaced.

Water pump
thermostat
clutch fan
Fluid Flushed

What else should I check/replace?

Dean · 2010-07-12, 08:38 PM

Timing and/or timing belt?

Radiator. Does it actually flow?

Head gasket

khail19 · 2010-07-12, 09:59 PM

Could be a blockage in the radiator or the head somewhere.

100_Percent_Juice · 2010-07-12, 10:08 PM

I read somewhere that a bad catalytic converter could cause an engine to overheat. Has anyone experienced this?

100_Percent_Juice · 2010-07-12, 10:09 PM

Quote:

Originally Posted by khail19

Could be a blockage in the radiator or the head somewhere.

Do you know how I would go about testing this?

100_Percent_Juice · 2010-07-12, 10:13 PM

Quote:

Originally Posted by Dean

Timing and/or timing belt?

Radiator. Does it actually flow?

Head gasket

If it was the head gasket, would I see oil in the antifreeze?

Dean · 2010-07-12, 10:23 PM

I'm pretty sure a small combustion chamber to water jacket gasket leak will blow out water without really having "oil" in the AF.

Does it start blowing out water before the idiot light comes on? That would probably be an indicator.

If you can pull a cap and look through the tubes and they are clear, fine but if you can't may have to pull an endcap and/or have somebody flow test it.

swr999 · 2010-07-28, 08:49 PM

Quote:

Originally Posted by 100_Percent_Juice

I read somewhere that a bad catalytic converter could cause an engine to overheat. Has anyone experienced this?

Most any muffler shop will test the cat backpressure for free.

2010-07-12, 08:03 PM	#1
100_Percent_Juice (40 percent vodka) Real Name: Joel Join Date: Oct 2006 Location: Reno, NV Posts: 4,446 Car: 2004WRX Class: Baby-Hauler/GroceryGetter	98' Blazer Constantly overheating. Out of ideas My sister has a 98 Blazer(the small one) and it has a problem with overheating. I am waiting for a list from her but, I do know that the following items have been replaced. Water pump thermostat clutch fan Fluid Flushed What else should I check/replace? __________________ "A power nap is when you sleep on someone who is weaker than you." - Dimitri Martin

2010-07-12, 08:38 PM	#2
Dean Señor Cheap Bastarde Real Name: Dean Join Date: May 2003 Location: $99 Tire Store Posts: 9,294 Car: $.04 STI Class: Fast,Cheap & Reliable=STI Deal, did somebody say Deal? Oh, Dean, yeah that's me.	Timing and/or timing belt? Radiator. Does it actually flow? Head gasket __________________ I am a Commodore PET --- Now get off my lawn you kids...

2010-07-12, 10:08 PM	#4
100_Percent_Juice (40 percent vodka) Real Name: Joel Join Date: Oct 2006 Location: Reno, NV Posts: 4,446 Car: 2004WRX Class: Baby-Hauler/GroceryGetter	I read somewhere that a bad catalytic converter could cause an engine to overheat. Has anyone experienced this? __________________ "A power nap is when you sleep on someone who is weaker than you." - Dimitri Martin

2010-07-12, 10:23 PM	#7
Dean Señor Cheap Bastarde Real Name: Dean Join Date: May 2003 Location: $99 Tire Store Posts: 9,294 Car: $.04 STI Class: Fast,Cheap & Reliable=STI Deal, did somebody say Deal? Oh, Dean, yeah that's me.	I'm pretty sure a small combustion chamber to water jacket gasket leak will blow out water without really having "oil" in the AF. Does it start blowing out water before the idiot light comes on? That would probably be an indicator. If you can pull a cap and look through the tubes and they are clear, fine but if you can't may have to pull an endcap and/or have somebody flow test it. __________________ I am a Commodore PET --- Now get off my lawn you kids...

2010-07-12, 09:59 PM	#3
khail19 EJ205 Real Name: Khail Join Date: Dec 2002 Location: Reno, NV Posts: 1,769 Car: 2016 VW GTI Meets? We have meets?	Could be a blockage in the radiator or the head somewhere.