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The mkiv Supra Owners Club

What is this pipe?


RedM

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Sorry no pics. Too dark but I'll describe as best I can.

 

Standing at the front of the car, look underneath. About level with the battery and about a forearms length under, there is a hole in the undertray with a pipe just about visible.

 

It looks like a overflow type thing. It was damp with a kind of sweet smelling fluid. Not oil, not strong enough. Any ideas?

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how about fabbing one from stainless, its only really a rectangular plate with the edges folded up, 3 bolts holes and 1 drain hole

 

And a locator for the battery strap. It could be done I suppose, but I'm not bothered about it at the moment. If and when it becomes an MOT failure, I will look into it further.

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Chris,

 

Am I right in thinking that the coolant overflows from the black, bent pipe at the top of the expansion tank and that this pipe under the car shifts the coolant so that it doesn't pool in the bay and/or trays?

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Do not forget that the charcoal canister vents on that side, near the engine, virtually underneath the fuse box.

 

I seriously doubt that it is acid, as sulphuric acid does not smell sweet and if it is reacting with the rubber in the tube, it would be an acrid smell not sweet.

 

I would go with either CW's suggestion, which is reasonable as Ethyl glycol is aromatic.

 

-Or-

 

Could be from the charcoal canister, which scrubs the fuel vapours, you have an awful lot of aromatics in Unleaded, more if you use 98RON.

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is it the coolant drain? a small hose drops out of the undertray that is connected to a valve that drains the rad, maybe your drain valve needs a bit of tightening?

 

charcoal canister drains behind the front wheel.

 

what are these pipes?

80_1931_129.jpg

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I've just been out for a good look at the pipe. Fluid is definitely pinkish in colour and smells like coolant.

 

The top of the rad by the rad cap has a dried white residue on it and leading off from there is a little pipe that has one of those spingy clip things (the kind that knack your fingers) on it. That clip seems loose.

 

Is that pipe (under the car) the far end of this pipe?

 

Any thoughts?

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Any thoughts?

 

yes

 

Is that pipe (under the car) the far end of this pipe?

 

no, that pipe that pokes out the bottom of the undertray comes from the bottom of the rad, it's a drain tube. the valve for it is at the bottom of the rad.

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you need to jam your hand/arm down where the intake piping goes with a bit of feeling around (right at the bottom, but still on the back of the rad) you should be able to find it. it will probably be quite difficult to apply a reasonable amount of pressure to it with your arm in this position (and stuff burning you) so it would then have to be jack up (or chase the dragon) and the undertray off.

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The pipe from the top of the rad goes to the expansion bottle in front of the rad. that vents via a little hooked pipe. the pipe under the car I *THINK* you mean is the drain pipe off the rad drain tap. If the drain is leaking coolant will be dripping from this pipe. Often it's missing altogether, fallen or knocked off because of undertray removal in the past.

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