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#15
by
oblique
on 19 Jul, 2017 09:13
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Thanks for the input, much appreciated.
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#16
by
fatmobile
on 20 Jul, 2017 12:31
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No gasket between exhaust manifold and turbo,... right?
Just some silicone.
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#17
by
RabbitJockey
on 20 Jul, 2017 13:17
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there is no gasket and usually no sealer, but i think i will try some hylomar or some exhaust puddy when i reinstall my turbo tonight.
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#18
by
oblique
on 01 Aug, 2017 13:11
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Turbo swap was a bit of a bear but it went well. Only took a day and a half including all new gaskets behind the motor. The four 12 point bolts holding turbo to manifold took 2 of us to loosen cleanly but after that it was ok. I urge anyone doing this to take the time clean all hardware and threads with tap and die as they mine were quite bad. The hardware that holds the downpipe to the bracket coming from the manifold was the worst.
The T3 has an awesome sound. Its like a low pitched whiney whistle in 2nd gear...love it.
So with a new pump, injectors, air filter, and good turbo my car still smokes quite significantly at WOT after the turbo spools. I'm assuming after all this work that this is normal?
Edit: Also, what should I do with the old K24? Shaft play is actually really quite good minimal. Had no oil consumption when I had it in.
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#19
by
vanbcguy
on 01 Aug, 2017 18:02
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Smoke can be adjusted using the LDA and max fuel screw on the pump. Or you can turn up the boost... ;-)
Sent from my LG-H873 using Tapatalk
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#20
by
RabbitJockey
on 02 Aug, 2017 05:12
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keep the k24 as a spare?
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#21
by
oblique
on 03 Aug, 2017 21:05
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True enough. There's a k24 rebuild thread that I bumped recently which had the photobucket ransom thing happening...is there any update on that? Is everyone just moving hosts? A lot of excellent threads have been lost. Our reliance on digital data has a price it seems.
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#22
by
RabbitJockey
on 04 Aug, 2017 04:34
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its very unfortunate. i think the description and checking other websites for how to rebuild a turbo would give you enough info on how to do it. Turbos are all put together nearly the same and they're pretty simple too.
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#23
by
oblique
on 08 Aug, 2017 13:45
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I'm going to attempt servicing the wastegate. One thing the missing photos from jake's thread would help with is the slide hammering the seals part. The cover of the wastegate seems to be pressed and folded over the body and I assume after I get it off I'll know what to do?
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#24
by
RabbitJockey
on 09 Aug, 2017 04:18
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are you trying to service the t3 wastegate? that can't be done don't mess with it you can only break it... just test it if anything.
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#25
by
oblique
on 14 Aug, 2017 09:24
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#26
by
oblique
on 21 Aug, 2017 20:33
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Got around to removing the wastegate from the k24. Few questions. The valve did not appear to be stuck - that is, maybe the removal process loosened it but it slides freely without any noticeable grit or skips in its travel - however - its very stiff. makes 30 lbs of hand pressure or more to close it - is this normal?
The banjo fitting that came off the wastegate had soot inside - is this a leak?
I see theres a 10mm allen slot at the bottom of the valve but it doesnt loosen anything when I turn it - whats the next step in disassembly process?
The turbines looked fine but the locknut looks like its missing an edge?
Snapped the head off one of the wastegate securing bolts - is it a standard drill out and extract on these?
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#27
by
vanbcguy
on 21 Aug, 2017 21:37
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Wastegate doesn't come apart any more than that. About 30 lbs of hand pressure sounds about right, there's probably about 3 square inches of diaphragm in the actuator so that'd be 10 PSI boost pressure. That center Allen bolt thing can make small changes to the preload on the return spring - nothing significant, like within 1.5 PSI of the design set point. It's also a vent that'll let some boost pressure out for cooling purposes so don't worry if the actuator doesn't hold pressure.
Normal to see the missing bit on the compressor and / or turbine nuts. That's from high speed balancing of the assembled turbo. They grind a little off the nuts as required to balance the assembly.
Sent from my LG-H873 using Tapatalk
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#28
by
RabbitJockey
on 22 Aug, 2017 04:57
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i always thought that 3mm allen adjusted how far the valve could open
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#29
by
oblique
on 23 Aug, 2017 09:36
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Thanks for replies and good info.
So assuming the wastegate was stuck ( I think the hammering action loosened it) and its not serviceable - whats the best way to clean it? Do I just work in some anti seize along the valve stem and hope for the best?
Its amazing that it got stuck in the 'open' position though...all that spring pressure still didnt allow it to close. So what causes this? A long, high RPM highway drive where the wastegate remained open for a long time?
Is the T3 wastegate superior becuase it has the 2 hoses to the wastegate which both push and pull on the valve?