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Old 02-11-2001, 02:16 PM   #1
Scooby Specialist
Member#: 311
Join Date: Sep 1999
Chapter/Region: RMIC
Location: South Jordan, Ut, USA
2013 STi

Question Cooling System Question

I recently have been having a hell of a time with cooling problems on my '98 RS. I had my radiator core rodded and cleaned out good. The water pump isn't leaking out of the weep hole, so I have no idea what it could be. My timing belt is melted pretty bad, but the water pump must be working at least some of the time, because I only overheat about once a day.

My question however, is when I got my radiator cleaned I think they replaced my cast aluminum elbow going into the water pump with a plastic one. Later that day it was leaking and causing a big cloud to follow me down the road. I need to confirm that the factory one is cast aluminum before I go yelling at the place that cleaned my radiator.

If anyone has input as to what may be wrong with my cooling system, I would appreciate that also.

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Old 02-11-2001, 04:21 PM   #2
Rob K
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Member#: 2777
Join Date: Oct 2000
Location: Montreal, Quebec

Not related to your cooling, but replace your timing belt right away. If it breaks, repairs will be expensive.
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Old 02-11-2001, 04:24 PM   #3
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Member#: 145
Join Date: Aug 1999
Chapter/Region: MWSOC
Location: The Windy City
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Did you check your thermostat and Radiator cap?

Some replacement radiator caps have different pressure ratings.

Why did you have your radiator cleaned? Too much offroading? And what exactly did they do?
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Old 02-11-2001, 04:32 PM   #4
P.K. Motorsports
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Member#: 1110
Join Date: Mar 2000
Location: USA
1999 RS


CLEANED the radiatior? What was in it? My experience with cars which have crap accumulating in the cooling system is very, very bad. If you timing belt is melted I would be putting your car back to stock and getting it to the dealer immediately.
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Old 02-11-2001, 08:18 PM   #5
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Member#: 311
Join Date: Sep 1999
Chapter/Region: RMIC
Location: South Jordan, Ut, USA
2013 STi


The first thing I did was replace the thermostat.

I had the radiator cleaned because it is a very narrow radiator that I figured would be easy to plug, and there was some stuff in the bottom of my overflow bottle so I assumed some of it had been sucked into the system. I haven't tried the cap, but it does hold pressure. I will replace it next.

I did take it to the dealer prior to getting my radiator cleaned. In fact, they supposedly changed my timing belt about 1 week ago, after that is when I started having problems. So I took it back to them and told them I think the tension on the timing belt is wrong or something. Those retards couldn't find anything. Hell they didn't even pull off the belt cover to check the water pump or the belt tension. The dealer sucks as*. They will be thoroughly yelled at tomorrow as soon as they open.

I drove my car around for a couple hours tonight and no problems. This is confusing the crap out of me.
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Old 02-11-2001, 09:55 PM   #6
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Member#: 1655
Join Date: Jun 2000
Location: Novato, CA
MY98 RS w/WRX Conv
I-Speed Tech


Possibly another MY98 with a Bad head gasket.

I also have a MY98 that overheats, but I'm positive it's the thermostat. Radiator/hoses/heater all COLD when the fans come ON, then drive it hard and [CLICK] it opens, everything's back to normal.

Usually, black carbon deposits in the coolant are signs of head gasket failure.

As for the elbow, I have a Black plastic one on my 98RS. I believe there's an O-ring inside to seal it, maybe they forgot/lost it and used gasket material.

(too lazy to change thermostats, that I've had for 3 months)
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