TRUNION END CAP SOLDERING

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Dennis Nicholas
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TRUNION END CAP SOLDERING

Post by Dennis Nicholas » Sat Jun 01, 2019 9:54 pm

In tech forum on specific cars, under front end rebuilds of a couple of GTC one trunnion gets end cap soldered in.

Just wondering .........is there no danger of heat damage to the brass (or whatever it is) when heating for soldering the end cap in?

Previously I used JB WELD smothered fairly thickly over the cap/trunnion........It was done in several stages of layering because one big thick blob just drips off......layer, leave till beginning to set .......next layer, etc. or use araldite etc. For new trunnions this can be done on bench with trunnion end facing upwards so if araldite is warmed and as it reacts anyway it becomes runny and will self ooze into crevice of cap to trunnion
Use solder with non corrosive flux otherwise flux residue will eat either of two or both metals......Plumbers solder?

Dennis


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TRUNION END CAP SOLDERING

Post by derekoss » Sat Jun 01, 2019 10:48 pm

Difficult to know exact composition but you won't hurt it at soft soldering temperature. It takes a fairly good sized torch to get enough heat in there for a good joint.
I knock the cap out and clean and tin the steel first. Then refit and solder. Any suitable Flux will work and wash the residue off.
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TRUNION END CAP SOLDERING

Post by peter freeman » Sun Jun 02, 2019 7:57 am

I have always soldered mine in with a blowtorch ( gas ) - never had any problems. Started doing this when the cap came out the first time I greased the trunnion.



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TRUNION END CAP SOLDERING

Post by ScimmyMike » Mon Jun 03, 2019 11:24 am

peter freeman wrote:
Sun Jun 02, 2019 7:57 am
I have always soldered mine in with a blowtorch ( gas ) - never had any problems. Started doing this when the cap came out the first time I greased the trunnion.
Shall be taking the same approach with the new ones for my SE5a and Coupe when fitting, better safe than sorry and a bloody site easier to do prior to fitting off the car


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TRUNION END CAP SOLDERING

Post by Old and Slow » Mon Jun 03, 2019 1:14 pm

The TR4 trunnions have a grease nipple in the cap. So far, the grease gun pressure hasn't blown out the caps, but soldering them in looks like a good idea. Do you fit the grease nipples first, or afterwards, with a risk of swarf getting in?


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TRUNION END CAP SOLDERING

Post by peter freeman » Mon Jun 03, 2019 1:27 pm

You need to avoid solder getting into the nipple threads - how you do it is up to you - you can of course run a tap through the threads to make sure they are not "contaminated" after you have soldered the cap in.



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