hjtrbo Bronze Donating Members 309 Member For: 13y 3m 7d Posted 19/09/21 12:07 AM Share Posted 19/09/21 12:07 AM Hey all, a bit suss on my F6 turbo. Looking around but not having much luck on trying to find the axial and run out specs for the shaft. Any leads? Ta. Link to comment Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 28,304 Member For: 16y 16d Gender: Male Location: Melbourne Posted 19/09/21 12:48 AM Share Posted 19/09/21 12:48 AM I just go by the fact the core moves around a small amount and it's acceptable as long as the blades of the compressor don't actually touch the housing... but yeah, I'd imagine those specs aren't simple to find and you'd probably be best off contacting a turbo specialist to ask them. Link to comment Share on other sites More sharing options...
hjtrbo Bronze Donating Members 309 Member For: 13y 3m 7d Posted 19/09/21 01:41 AM Author Share Posted 19/09/21 01:41 AM Thanks. Nothing rubbing that is obvious from inspecting on the vehicle. Just feels a bit looser than what I was expecting. Hard to tell when I have nothing to compare it against. And yes, a quick phone call to a turbo specialist is in order. Wonder if they will give me the measurements? I do have to pull the turbo off at some point as the rear housing bolts keep backing out and I want to put safety wire through them to stop it happening. Good time to inspect then. I did find these specs for a GT35 series turbo on another forum. Best I can find so far. Quote To measure the axial movement of the turbine shaft, position a dial indicator gauge against the end of the shaft at the turbine end, and push against the compressor end of the shaft. Axial play should not ex .002in (0.07mm) To measure radial movement, place the gauge through the oil inlet hole and against the shaft. rotate the turbine shaft and observe any fluctuations. Jiggle the shaft up and down, back and forth, while observing the dial gauge. Radial play shouldn't exceed 0.004in (0.15mm) Link to comment Share on other sites More sharing options...
bjc Donating Members 2,812 Member For: 20y 7m 23d Gender: Male Location: Townsville Posted 23/09/21 01:27 AM Share Posted 23/09/21 01:27 AM Even being almost dry of oil (eg: not fitted to the car) the play is minimal, it moves slightly more but it is still only minor like Keith said. Listen to the turbo (or remove the intake pipe and watch it) spin down to a stop after shutting the engine off and see/hear how quick it stops. My BA when I had it you could hear the bearings but that's normal (imo), my F6X is quieter as I rarely drive it and it's not running 18-21psi on the top end like the BA was. On another note...removing the OEM filter that's in the engine block would be more important imo. Fit an aftermarket line with a filter (if you want) as F6's are worth so much these days what's $150-200 in the big scheme of things... 1 Link to comment Share on other sites More sharing options...
hjtrbo Bronze Donating Members 309 Member For: 13y 3m 7d Posted 29/06/22 04:19 AM Author Share Posted 29/06/22 04:19 AM After some more time and bashing she's done. Blowing smoke and there is a witness mark on the housing where the blade has contacted. Oh well, it's had a good run. I'm on the band wagon... 2 Link to comment Share on other sites More sharing options...
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