2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Rocks in thermostat housing?

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Old Mar 10, 2011 | 12:29 AM
  #1  
-Crash-'s Avatar
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89FC
 
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Rocks in thermostat housing?

s5 GXL, 120k miles, 5speed.

So maybe not rocks per say but pretty damn close. I'm thinking there calcium build up. I've been running strait water for a few weeks now while trying to figure out if I have a water leak or blown coolant seals. Found my water neck cracked and removed the rad hose to see how bad it was when I found this. Any ideas?
Attached Thumbnails Rocks in thermostat housing?-03092116.jpg   Rocks in thermostat housing?-03092123.jpg   Rocks in thermostat housing?-03092119.jpg  
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Old Mar 10, 2011 | 04:18 AM
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Pele's Avatar
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Yup... Mineral deposits or electrolysis...

What's your radiator made of?
Is the radiator grounded to the chassis of the car?
Tap or distilled water?
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Old Mar 10, 2011 | 11:38 AM
  #3  
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89FC
 
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Rad is Brass.
I believe so, but I'll double check.
Tap water.

Radiator was recently replaced with a used Brass unit.
Attached Thumbnails Rocks in thermostat housing?-02061108a.jpg   Rocks in thermostat housing?-02051853.jpg  
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Old Mar 10, 2011 | 01:09 PM
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Mineral deposits. You need to run distilled or ro/di water.
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Old Mar 10, 2011 | 03:06 PM
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89FC
 
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Thanks guys.

Just put a bid on this, anyone else buy one off this dude? If so hows the quality?
http://cgi.ebay.com/ebaymotors/1989-...Q5fAccessories
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Old Mar 10, 2011 | 05:31 PM
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From: Mesquite, TX-DFW
I am using this....

http://www.mazdatrix.com/getprice.as...m=15-1720-ALUM

Works great. A bit more than the ebay unit, but I'd damn sure trust mazdatrix more.
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Old Mar 10, 2011 | 05:56 PM
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^Mazdatrix probably sells the one this dude makes lol

Last edited by -Crash-; Mar 10, 2011 at 06:08 PM. Reason: eh?
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