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The mkiv Supra Owners Club

swapping a single; what tools and any top tips for those hidden bolts?


Mike B

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Question regarding swappinng a single turbo.

 

I have got so far and am seeking some to tips before I surrender to the childhood affliction of "just going for it"... lol

 

the two problems I am going to have is;

 

Getting the water jacket fittings off, shown in the inset....

is there a special too I can use to get these fitting off as the spanners will not get in such a small gap...?

 

And... the one manifold to turbo bolt, also shown in inset, partially hidden underneath the hot side of the turbo. This one is a nut, so I assume that everyone just bolts them on and off from underneath the manifold flange instead of tightening up on the turbo side...

 

any suggestions welcomed :innocent:

DSC00005.jpg

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I found the easiest way to remove those aeroquip fittings it to remove the compressor housing from the turbo completely (just 6 bolts), then use an adjustable spanner (or large ring spanner) to remove the aeroquip fitting. You might need two spanner as there is probably a male/male steel adaptor fitting to the turbo housing, which would be best to leave in place.

 

The 4th nut (At the back closest to the block?) is normally different, the manifold has a bolt welded to it on that one so it should simply be a case of undoing the nut with a ring spanner (will add a pic in a moment if I can find one).

 

...unless you mean the one at the front on the block side, which will should become accessible after removing the compressor housing

DBB Install.jpg

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Thanks Homer, I did think of removing the cold housing, but am reluctant to for two reasons; damaging the impeller + I cant get access to all the bolts on the back of the cold housing.. one is right underneath the cartridge and hidden!

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Thanks Homer, I did think of removing the cold housing, but am reluctant to for two reasons; damaging the impeller + I cant get access to all the bolts on the back of the cold housing.. one is right underneath the cartridge and hidden!

 

Unfortunately I think its the only real way to do it. One of the compressor bolts can be tricky to get too, but Terry would have had to tighten it, so it must be possible :) I think I ended up cutting a ring spanner in half to get it to fit

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Update; OK the turbo is off, thanks for the tip; taking the cold housing off did the trick.

 

The turbo was actually loose on one side, both bolts came off with my fingers, there was quite a bit of blowthrough on the gasket. I knew she wasn't spooling right.

 

Last Question.

 

Do you use a gasket sealant? The manifold and hot housing are not 100% smooth and there may still be a little gas leaking.. is it possible to use a sealant or is that a big no-no?

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