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arrowmntdiesel
 Post subject: Block heater 0-ring
PostPosted: Fri Apr 07, 2006 8:48 pm 
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Joined: Tue Apr 04, 2006 8:13 pm
Posts: 41
One item I have not been 100% sucessful in finding is the proper size o-ring for the block heater. The one I am using now is from the local Caterpillar dealer. They have a nice selection of o-rings and I found one close although it does fit tight. Also any ideas on the sealing of the small retainer screw in the middle?
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DMZ
 Post subject:
PostPosted: Tue Apr 18, 2006 7:53 am 
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Joined: Wed Jul 20, 2005 11:35 am
Posts: 43
I have found a large selection of O rings at Ace Hardware or Home Depot. Though I have never had a problem with the screw leaking on my block heaters, if one was to do so I would seal it with Permatex high temp RTV, the red stuff, (after removing and cleaning the heater).
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arrowmntdiesel
 Post subject:
PostPosted: Fri Apr 21, 2006 9:52 pm 
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Thanks for the reply. The O-ring would need to be able to take not only the temprature of the engine, but also the block heater itself.
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DMZ
 Post subject:
PostPosted: Sat Apr 22, 2006 11:33 am 
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The engine block is not very hot where the plug is (relatively speaking) as the water jacket is right there. The brass plug and O ring should never get hotter than the temp of the coolant which is flowing through rubber hoses.
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Finalman
 Post subject:
PostPosted: Sat Apr 22, 2006 4:57 pm 
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Joined: Thu Sep 23, 2004 7:20 pm
Posts: 991
Location: Winston Salem, NC
Why don't you just buy a new block heater? I find the stock ones break too easy.

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arrowmntdiesel
 Post subject:
PostPosted: Sat Apr 22, 2006 9:46 pm 
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Second time I have heard that suggestion, I give! Next time I will go buy a new one. :?
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DMZ
 Post subject:
PostPosted: Sat Apr 22, 2006 9:58 pm 
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I have had one on back order from NAPA for 40 some days. Keep the old one for a spare.
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