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So based upon tonight's drive you suspect the top port was leaking and failing to seal the wastegate valve?
Fuckmuppetry & Bodge Award Winner
Nope not exactly. The top port was fine.
The wastegate valve was leaking on the housing, the boost pressure was just holding it shut tighter - any small flow through the valve was tending to push it open - much like a plug in a full sink is difficult to unseat, but if you put a hole in it, you can pull it open easy because less differential pressure either side of the plug.
However, in order to hold the valve shut there needs to be boost present, so when just starting to boost there's no 'assist ' and lots of leakage meaning a boost dead spot when picking up from idle.
The wastegate valve was leaking on the housing, the boost pressure was just holding it shut tighter - any small flow through the valve was tending to push it open - much like a plug in a full sink is difficult to unseat, but if you put a hole in it, you can pull it open easy because less differential pressure either side of the plug.
However, in order to hold the valve shut there needs to be boost present, so when just starting to boost there's no 'assist ' and lots of leakage meaning a boost dead spot when picking up from idle.
So you've had the wastegate off, ground it back to clean it up? or just swapped it?
So you've had the wastegate off, ground it back to clean it up? or just swapped it?
Fuckmuppetry & Bodge Award Winner
Yes - when the turbo was off for the oil leak fix.
I was going to lap the seat back into the housing but realised I had nothing to lap it in with. Should have turned up a drill mounted tool to suit and done the job properly whilst I had access.
I went for the half-arsed wire brush in a drill - but it has seemed to work.
The turbo shaft is slopping about a bit so it's days are numbered.
Are you thinking about machining a flywheel spacer or getting and adjusted width flywheel made?
Does your garage engine still have the 220mm flywheel fitted?
Are you thinking about machining a flywheel spacer or getting and adjusted width flywheel made?
Does your garage engine still have the 220mm flywheel fitted?
Flywheel spacer the same width as the adaptor plate.
No fly on my spare engine but I still have my original DMF
Also eyeing up a LUK 415 0103 10 earlier for a shade under £300.
There's a LUK 228mm SMF conversion for the Golf / Audi 2.0TDi GRF with the correct hub profile PN#826856 is the clutch kit (3 parts) which would mean keeping what you've got and just changing the sintered plate/paddle?
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