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The mkiv Supra Owners Club

Bolt-in wheel valves...help please.


Si_s Supe

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My car came fitted with TRD Type F/T 2 piece wheels. The NSF loses air and needs pumping up every other week.

 

Seeing as the wheels must be pretty old now and I assume the valve seals have never been changed, I'm taking a stab in the dark at that being the culprit.

 

The valves are metal bolt in jobbies as you can see in the photos below and are just off 90 degrees. Anyone know where I can get new seals or if needs be entire new valves? Trawled Google and visited three local tyre shops and have drawn a blank so far!

 

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Quick test for you.

 

Take the wheel off, lay it flat with the valve/wheel face uppermost.

 

Pour water around the rim and look for bubbles.

 

I had an air leak on my Fiske split rims, and at first through it was the valve, but it needed up being a leak where the rims join.

The tyre fitter had knocked when fitting the tyres.

 

Took the tyre off, cut away the old silicone and applied new silicone and jobs a good un.

 

This was the advice from Ibrar

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Cool' date=' I'll have a go at that, if for no other reason than to confirm the valve is leaking. Although these are 2 piece wheels, they're not actually split rims. The spoke section bolts to the rim section.[/quote']

 

Ah ok, well you could try it, the flip the wheel and check the valve.

 

Just like you would of done with a bicycle wheel :)

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It can only be leaking from either the valve seal where it fits to the rim, the

actual valve itself, the tyre beads or the tyre has a puncture.

 

On these wheels the rim where the tyre sits is one piece and its just the centre

section that unbolts

 

 

Put some water washing up liquid around the base of the valve where it comes

through the rim (red arrow) and watch for bubbles, also take the valve cap off and do

the same around the valve mechanism with the valve facing upwards.

 

If neither of these areas are leaking put the wheel on its back or front on level ground

and put water washing up liquid around where the tyre meets the rim, do this on the inner

and outer faces checking for bubbles

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Edited by Dnk (see edit history)
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I test all my tricky welding jobs and "fixes" on the wife's car. I am too damn good though, she's still here...

 

Next welding job you have, I'll come and do it for you.

 

I did brazing at school once on a little crocodile I made, so I'm an expert.. ;)

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