| [GMCnet] Leaking oil cooler connection [message #349296] |
Tue, 15 October 2019 04:26  |
Gerard Hickey
Messages: 53
Registered: June 2019
Karma: 1
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Member |
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I have recently found that one of my connections into an aluminum
radiator for the oil cooler lines is leaking a little bit. It is not the
flex hoses themselves, but a brass adapter between the flex hoses and
the radiator. It is leaking at the threads of the adapter.
I would rather not over torque the adapter and cause damage to the
radiator--although I don't know how tight the adapter is right now. So
my question is if anyone has any thoughts about what I can put on the
threads to seal the connection better. Would RTB be good or even teflon
tape? I think my preference would be RTB as it seems to me that it would
last longer. Or is there another product that I should use?
Thanks.
--
Gerard Hickey / WTØF IRLP:3067/Echolink:529661
hickey@kinetic-compute.com DMR: 3102272
425-395-4554
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| Re: [GMCnet] Leaking oil cooler connection [message #349307 is a reply to message #349296] |
Tue, 15 October 2019 11:12  |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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Is it leaking at the threads where it goes into the radiator or is it leaking from the thread where the adapter screws on to the hose?. The reason I ask is those are two different connections types and have two different solutions to fix the problem.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Leaking oil cooler connection [message #349308 is a reply to message #349296] |
Tue, 15 October 2019 11:13 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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Senior Member |
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If they are flair fittings I would use a copper flair gasket at the flair connection . At the pipe connection I would use Teflon tape and pipe dope preferably Teflon dope.make sure you don't over hang the end of the fitting with the tape.
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: [GMCnet] Leaking oil cooler connection [message #349312 is a reply to message #349309] |
Tue, 15 October 2019 12:17 |
GMC.LES
Messages: 505
Registered: April 2014
Karma: -2
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Senior Member |
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I second what Matt has suggested, and will add that cleanliness in the threads is the key to success with any form of threaded fitting sealant. Make sure you clean ALL oily residue from ALL of the surfaces where the sealant is applied BEFORE applying the sealant.
Les Burt
Montreal
'75 Eleganza 26'
> On Oct 15, 2019, at 12:17 PM, Matt Colie via Gmclist wrote:
>
> Gerard Hickey wrote on Tue, 15 October 2019 05:26
>> I have recently found that one of my connections into an aluminum radiator for the oil cooler lines is leaking a little bit. It is not the flex
>> hoses themselves, but a brass adapter between the flex hoses and the radiator. It is leaking at the threads of the adapter.
>>
>> I would rather not over torque the adapter and cause damage to the radiator--although I don't know how tight the adapter is right now. So my
>> question is if anyone has any thoughts about what I can put on the threads to seal the connection better. Would RTB be good or even teflon tape? I
>> think my preference would be RTB as it seems to me that it would last longer. Or is there another product that I should use?
>>
>> Thanks.
>
> Gerard,
>
> It seems you are talking about a leak right where the brass adapter screws into the aluminum radiator body. There is a threaded bushing welded into
> the radiator tank that the brass threaded adapter is screwed into.
>
> Unless you are very good at using teflon tape, I would advise against it in this case.
>
> I suggest that you try to locate some Loctite 567. It is really expensive, but I have had such good success with this that I have actually purchased
> some when the supply that I appropriated from past employers was depleted.
>
> A suggestion. When removing and replacing this fitting, use a socket as that will be less likely to deform that fitting.
>
> Matt
> --
> Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
> Electronically Controlled Quiet Engine Cooling Fan
> OE Rear Drum Brakes with Applied Control Arms
> SE Michigan - Twixt A2 and Detroit
>
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