[TR] Small coolant leak

Kinderlehrer kinderlehrer at comcast.net
Sun Sep 13 15:23:54 MDT 2020



From: Kinderlehrer [mailto:kinderlehrer at comcast.net] 
Sent: Sunday, September 13, 2020 2:20 PM
To: 'John Linney'; 'David Friedlander'
Cc: 'TR3 Triumphs'; 'New England Triumphs'
Subject: RE: [TR] Small coolant leak


Interesting, John. I would have said the opposite. Pipe threads generally need sealant, I thought. I use TPFE pipe dope and stay away from the tape where  passages may get fouled by little strings that tear off (thank you Randall, may you rest in peace). I have had issues with new petcocks leaking which I solved by taking them apart, cleaning the bore really well and then polishing the cone. I seem to remember I put it in the drill press and used 2000 grit wet sand paper to achieve a very smooth surface. So far, so good.




From: Triumphs [mailto:triumphs-bounces at autox.team.net] On Behalf Of John Linney
Sent: Sunday, September 13, 2020 12:30 PM
To: David Friedlander
Cc: TR3 Triumphs; New England Triumphs
Subject: Re: [TR] Small coolant leak


Correct. I put the pipe thread sealant in the bore of the valve spigot. The threads don’t need sealant.


On Sep 13, 2020, at 12:22 PM, David Friedlander <forzion7 at gmail.com> wrote:

But, John, it's not the threaded portion that leaks.... No threads on stem of the petcock. Seems to me, like Tom said, these either stop leaking because they get full of crud or people just plug the hole. As it is, the valve is located just above the starter so that's where it drains! I'm guessing that if anyone wanted to drain their engine block, they'd just use the radiator petcock instead.




On Sun, Sep 13, 2020, 3:14 PM John Linney <john at linneyweb.com> wrote:

I went through 3 valves on my TR4. The final one got a seal using plumber’s pipe thread sealant.

Sent from my iPad

> On Sep 13, 2020, at 11:38 AM, David Friedlander <forzion7 at gmail.com> wrote:
> I have noticed a small coolant leak from my TR3 and have traced it to the handle assembly of the water drain tap on the side of the block. Anyone else had this issue? It's a new tap and don't know what the fix might be. It's not leaking from where the tap threads into the block... Thanks in advance for any BTDT advice...
> Dave
> ** triumphs at autox.team.net **
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