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Unread 09-05-2004, 04:51 PM   #1
HardStepper
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Join Date: Aug 2004
Posts: 6
Radiator drain petcock

Hi guys,
i was driving today and in the parking lot of a store found out that my 1995 GC V8 was leaking coolant. Drove back home and visually checked radiator and i suspect that the leaking part would be drain petcock. It's still too hot under the hood, so i came to this forum to ask about the problem.
Might the petcock be broken or just needs tightening? Or if it's broken, how to remove it, does the procedure need any special tools? Allen key?
Ok, thanks.

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Unread 09-05-2004, 05:55 PM   #2
Stocker
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Join Date: Nov 2002
Location: Jefferson State
Posts: 814
If the petcock is leaking, that's more than they usually do when you try to drain the coolant through them! Terrible design - when it's cool enough, you should be able to turn it by hand if it just needs tightening a bit. I understand some guys just remove it (just keep loosening until it comes out) and replace it with one that actually works. When draining coolant, it's easier to remove the lower hose than to wait a few weeks for it to drain through the petcock.
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Unread 09-05-2004, 08:27 PM   #3
greasefingers
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Join Date: Sep 2003
Location: Northern VA, USA, NJ
Posts: 8,237
If you haven’t changed your fluid in the last 30K, then now’s the time. Throw out that draincock and replace it with a “Help” part (pn# 61126) Do not use tap water with the coolant. Buy de-ionized water at the grocery store.
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Unread 09-06-2004, 11:19 AM   #4
HardStepper
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Join Date: Aug 2004
Posts: 6
Thanks guys,
i was searching the net for Help petcock, but could not find any. Any hints, where to get one?
I was wondering, how to clean the radiator itself. The lower front side is clogged with dirt and grease. Should i use any cleaning solutions to get it off or wire brush or something?
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Unread 09-06-2004, 11:37 AM   #5
Meerkat
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1996 ZJ 
 
Join Date: Apr 2003
Location: Belle, WV
Posts: 4,930
Quote:
Originally Posted by HardStepper
Thanks guys,
i was searching the net for Help petcock, but could not find any. Any hints, where to get one?
I was wondering, how to clean the radiator itself. The lower front side is clogged with dirt and grease. Should i use any cleaning solutions to get it off or wire brush or something?

At the autoparts store, such as NAPA, Autozone, Advance Auto, etc., there is a section with odds and ends repair pieces such as window cranks, drain plugs, body clips, nuts, bolts, radio knobs, and just about every thing you can think of that breaks or snaps off your car. These parts are on red cards that say "Help" in big white letters. They cover just about every car made, so you really need to be sure of what your are getting. Grease has saved you at least 30 minutes research by providing the part number you need.

Don't use anything stiffer than a nylon brush to clean your radiator, it is only soldered together and the fins are fairly fragile. To clean grease, the best option is to use a strong solution of dishwashing liquid. Mix it up in a bucket and get in there with your nylon brush. A strong jet from your garden hose will do well for rinsing.

HTH
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