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Thread: Coolant pipe

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    Default Coolant pipe

    Hi with my down time I thought I'd get round to fitting new EGR cooler and the metal coolant pipe that runs along the front of the engine . A couple of questions if you don't mind 1 I've got a new gasket for the coolant pipe is it advisable to use any sealant on it ?, 2 does anyone know what thread the bleed screw is ? don't like those plastic things . cheers and all keep well
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    Regular Member northpole's Avatar
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    you could remove the bleed screw on the new pipe and check the thread yourself and compare it to whatever bolts you have laying about... but it's plastic for a reason... basically so you don't damage the metal pipe upon closing it.

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    Quote Originally Posted by northpole View Post
    you could remove the bleed screw on the new pipe and check the thread yourself and compare it to whatever bolts you have laying about... but it's plastic for a reason... basically so you don't damage the metal pipe upon closing it.
    I did check my bolt store and can't find any the right size

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    Regular Member northpole's Avatar
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    In that case leave it be.... it actually saves the drain plug from being over tightened thus rendering your metal coolant pipe useless...

    One tip I will give you though... get some metal paint and protect the pipe from outside rust it'll also look better

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    Quote Originally Posted by northpole View Post
    In that case leave it be.... it actually saves the drain plug from being over tightened thus rendering your metal coolant pipe useless...

    One tip I will give you though... get some metal paint and protect the pipe from outside rust it'll also look better
    it's stainless

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    Regular Member northpole's Avatar
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    I've seen stainless rust... the only version of stainless steel that is harder wearing is polished stainless steel...and left long enough even that starts rusting.. I would paint it period but it is up 2 you. And why it trusts is simple it still has iron in it as a core component..

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    why not , better to do it now while it's off

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    Quote Originally Posted by northpole View Post
    I've seen stainless rust... the only version of stainless steel that is harder wearing is polished stainless steel...and left long enough even that starts rusting.. I would paint it period but it is up 2 you. And why it trusts is simple it still has iron in it as a core component..
    Yes and varying amounts hence most stainless has a lower tensile strength than others, if I remember correctly it’s a higher chromium content that stops corrosion. The only corrosion I ever saw on my stainless coolant pipe was from the bronze brazing that joins its components together.
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    Regular Member northpole's Avatar
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    Quote Originally Posted by Dog_Book View Post
    Yes and varying amounts hence most stainless has a lower tensile strength than others, if I remember correctly it’s a higher chromium content that stops corrosion. The only corrosion I ever saw on my stainless coolant pipe was from the bronze brazing that joins its components together.
    Yeah but you keep your car and engine clean... and if you spot something like rust you replace the lot...
    Like I said if left long enough it'll rust...

    I have painted a full stainless steel downpipe with heat resistant enamel paint just to find it rust anyway... but that was on a daily mk4 golf gt tdi... it saw all kinds of weather... rust was on the downpipe after 8 years of daily abuse ( I say abuse because I managed to drive that car from 70k to 472.5 k, it was with relayed travel anyway, i used to work as a mctip ict network specialist consultant, sorting out network problems all over the UK)

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    Default Coolant pipe

    Sorry back again about to start this job tomorrow ( I'm assuming the new gasket doesn't need any sealant ) while getting ready to start I noticed the wiring connector for the cooling fans slide out clip is broken , there's nothing to pull out to release it does anyone know of a way to get it off ? with out destroying it !!IMG_0019_LI.jpg

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