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Old 01-22-2007, 02:42 PM   #1
pilfflip
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'02 Murdered WRX
'02 Silver Legacy

Default My bad water pump led to a bad radiator

I have the Murphys law running rampant on me.


So my water pump went out. I grabbed a good one sitting around, i threw it on my car with a gasket and some high heat silicone.

I got that taken care of, purged the system of air, and took off on a test drive. The heat begins to go up and eventually pegs.

I get on the phone with a +20 year subaru mechanic and after describing:

* running temp at idle and O/H during driving
* HG job less than 30,000 miles
* replaced water pump
* Brand new thermostat
* Heat from the heater core UNTIL driving

He says, it sounds like my radiator. When you drive the radiator depends more on the air passing through it then the fans. It begins to O/H and expel extra coolant from the radiator that's why the air coming from your heater core goes cold.

So, with all of the problems that i've been having lately with my car. I'm skeptical that that's the problem but at the same time I can't really rule out the idea.

I JUST WANT MY CAR TO RUN WITHOUT ISSUES!



~Mike
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Old 01-22-2007, 02:48 PM   #2
xcntrk75
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Sorry to hear of this problem. If you find you’re looking for a new radiator, I have a used one out of a 98’ LGT, yours for $40 bucks + shipping.
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Old 01-22-2007, 06:30 PM   #3
Plays_With_toys
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Are you sure it's completely purged of air? Sounds like mine when I still had a small air bubble.
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Old 01-23-2007, 01:48 AM   #4
geraDOT
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cherry red

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Did he checked-out radiator cap? Check it or replace with new one just for try...

IMHO I would recommend also 1) to carry out pressure test of cooling system, 2) to check the readiator neck for rust or debris
3) if the hose from radiator to reservoir tank is loose then it pulls the air in instead of coolant from tank.

Last edited by geraDOT; 01-23-2007 at 01:57 AM.
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Old 01-23-2007, 09:40 AM   #5
Patrick Olsen
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Radiator cap? Old hose that's collapsing once you're driving?

The mechanic's explanation doesn't make much sense to me.

Pat
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Old 01-23-2007, 03:15 PM   #6
MYfirst00
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The mechanic's explanation makes sense to me. He's describing if there's not a lot of fluid going through the radiator core because of it overheating into the resevoir or whatnot, then the fluid's not going to make it over to the heater core.

With my first RS, I had to have the radiator replaced at the same time as the waterpump. Luckily it was under warranty.
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Old 01-23-2007, 05:51 PM   #7
Patrick Olsen
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Quote:
Originally Posted by MYfirst00 View Post
The mechanic's explanation makes sense to me. He's describing if there's not a lot of fluid going through the radiator core because of it overheating into the resevoir or whatnot, then the fluid's not going to make it over to the heater core.
I understand that - that's standard Subaru blown head gasket behavior, and I've been through that 3 times with my car.

I don't understand what the car being in motion and the radiator "depending more on air flow through it than the fans" has to do with anything, though. His description just doesn't make any sense.

Pat
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Old 01-23-2007, 05:59 PM   #8
MYfirst00
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Ah, 10-4
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Old 01-23-2007, 07:59 PM   #9
DLC
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Subaru Coolant Conditioner ruined at least two radiators on my car, three sets of head gaskets and two head resurfacings.

Thankfully my last overheating problem seemed to be as simple as the thermostat. I figured it was another clogged radiator, but started with the cheapest fix first.
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Old 01-23-2007, 08:27 PM   #10
pilfflip
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I thought it made sense when he explained it to me. Nevertheless i'm going to replace the radiator.

But to shoot down the possibilities that were thrown out. The reservoir hose is good, I already checked that.

The hose to the heater core, top and bottom, and aux water pump hose are all replaced during this minor fiasco, and the cap is still in hop opr condition.


~Mike
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Old 01-23-2007, 10:46 PM   #11
Patrick Olsen
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Quote:
Originally Posted by pilfflip View Post
But to shoot down the possibilities that were thrown out. The reservoir hose is good, I already checked that.

The hose to the heater core, top and bottom, and aux water pump hose are all replaced during this minor fiasco...
I'm less concerned about those hoses and more concerned about the radiator hoses, the ones that carry the bulk of the coolant flow to/from the radiator. Have they been replaced?

Quote:
Originally Posted by pifflip
...and the cap is still in hop opr condition.
"hop opr"?

Pat
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Old 01-24-2007, 03:11 PM   #12
Jonathan
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Quote:
Originally Posted by pilfflip View Post
The hose to the heater core, top and bottom, and aux water pump hose are all replaced during this minor fiasco, and the cap is still in hop opr condition.
Quote:
Originally Posted by Patrick Olsen View Post
"hop opr"?

Pat
"hop opr" = Top Operational condition

A radiator either fails because of corrosion causing a leakage, or crud gets into the the cores causing either a full or partial blockage and coolant doesn't flow as nicely as it should.
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Old 01-25-2007, 10:34 PM   #13
pilfflip
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Sorry, the "hop opr" was meant to say "good opr(short for operating)". I was on my blackberry when I left that posting and must've missed a button.

The top and bottom radiator hose are good, the bottom one has been replaced recently and i have no leaking problems from the top one.

Could the clogging of a radiator be caused by the blowing of a head gasket? My brother had his HGs blow and he said he had to flush the radiator because of all the junk that was in it after they blew. And since i've recently had my HGs. It doesn't seem that far fetched...


~Mike
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