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Dutch924-racer
Joined: 23 Jul 2007 Posts: 1077 Location: The Netherlands
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Posted: Fri Jan 27, 2017 5:59 am Post subject: Wastegate valve guide play |
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How much play may a wastegate valve guide have ?
I asume it can have more play then a valveguide of the cilinder head because in the wastegate it is not oil cooled/ lubricated.
Can you buy a new valve guide somewhere? _________________ 937 trackday car
Series 2 engine
951S turbo and intercooler
Fast road camshaft
Forge recirculation valve + boost controller |
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ideola
Joined: 01 Oct 2004 Posts: 15548 Location: Spring Lake MI
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Posted: Fri Jan 27, 2017 7:37 am Post subject: Re: Wastegate valve guide play |
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Dutch924-racer wrote: | How much play may a wastegate valve guide have ? |
Good question
Dutch924-racer wrote: | Can you buy a new valve guide somewhere? |
Not that I've found
If you take the wastegate apart, be aware that the big fiber gasket between the upper and lower housings is not available anywhere and you'll need to make your own. _________________ erstwhile owner of just about every 924 variant ever made |
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gegge
Joined: 27 Jul 2007 Posts: 1124 Location: Sweden
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Posted: Fri Jan 27, 2017 8:34 pm Post subject: |
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I hade one with several millimeters of play. Good from a heat expansion point of view, it certainly didnīt stuck. But longlivety of the membrane suffered.
The WG valve is slow moving compared to the valvetrain , no risk of wear or seat damage due to misalignment from valveguide wear. _________________ Carl Fredrik Torkildsen
924 turbo -81 Carrera GT RESTOMOD
924 turbo -80 Dolomite De Luxe
924 -85 DP kit, BBS RS, M030 and tuned engine
924s -86 Black on black turbo with Fuchs |
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Mike9311
Joined: 14 Dec 2004 Posts: 1678 Location: Chicago-ish
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Posted: Fri Jan 27, 2017 11:22 pm Post subject: Re: Wastegate valve guide play |
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Dutch924-racer wrote: | How much play may a wastegate valve guide have ?
I assume it can have more play then a valve guide of the cylinder head because in the wastegate it is not oil cooled/ lubricated.
Can you buy a new valve guide somewhere? |
If you can't get one anywhere maybe I can make them. I have made valve guides before (reliably saw 11000+k in a ducati) and I am currently doing it now on a 931 head
I'll see if I can find my disassembled wastegate today (the one where the previous owner used high temp silicon to repair the diaphragm ) _________________ 1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car |
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Rasta Monsta
Joined: 12 Jul 2006 Posts: 11723 Location: PacNW
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Posted: Sat Jan 28, 2017 1:55 am Post subject: |
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I never found a spec, but mine was quite loose as well. Head rebuilder fabbed a guide. _________________ Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
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ideola
Joined: 01 Oct 2004 Posts: 15548 Location: Spring Lake MI
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Posted: Sat Jan 28, 2017 2:18 am Post subject: Re: Wastegate valve guide play |
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Mike9311 wrote: | If you can't get one anywhere maybe I can make them. |
I would love to be able to offer these as part of my rebuild kit. What do we need to do to make this happen? _________________ erstwhile owner of just about every 924 variant ever made |
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Rasta Monsta
Joined: 12 Jul 2006 Posts: 11723 Location: PacNW
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Posted: Sat Jan 28, 2017 3:33 am Post subject: |
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Take that back, looked back at an old thread and apparently spec is .003? _________________ Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
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Mike9311
Joined: 14 Dec 2004 Posts: 1678 Location: Chicago-ish
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Posted: Sat Jan 28, 2017 3:55 am Post subject: Re: Wastegate valve guide play |
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ideola wrote: | Mike9311 wrote: | If you can't get one anywhere maybe I can make them. |
I would love to be able to offer these as part of my rebuild kit. What do we need to do to make this happen? |
I'll measure everything and make one up. It would be nice to measure it before and after install so we know how the install tightens things up. Once we are all satisfied, it should be good to go.
Here is a manganese bronze valve guide I made up for a Ducati
_________________ 1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car |
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Mike9311
Joined: 14 Dec 2004 Posts: 1678 Location: Chicago-ish
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Posted: Sat Jan 28, 2017 4:13 am Post subject: |
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Found it...although I wish I would keep things together for the sake of organization
_________________ 1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car |
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ideola
Joined: 01 Oct 2004 Posts: 15548 Location: Spring Lake MI
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Posted: Sat Jan 28, 2017 4:21 am Post subject: |
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Mike, I have countless spare wastegates. Are you coming to Fourth Friday this afternoon? You can take one or two back with you for dissection and experimentation. _________________ erstwhile owner of just about every 924 variant ever made |
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Mike9311
Joined: 14 Dec 2004 Posts: 1678 Location: Chicago-ish
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Posted: Sat Jan 28, 2017 4:38 am Post subject: |
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ideola wrote: | Mike, I have countless spare wastegates. Are you coming to Fourth Friday this afternoon? You can take one or two back with you for dissection and experimentation. |
Forth Friday? I am missing something _________________ 1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car |
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ideola
Joined: 01 Oct 2004 Posts: 15548 Location: Spring Lake MI
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Posted: Sat Jan 28, 2017 6:24 am Post subject: |
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Mike9311 wrote: | ideola wrote: | Mike, I have countless spare wastegates. Are you coming to Fourth Friday this afternoon? You can take one or two back with you for dissection and experimentation. |
Forth Friday? I am missing something |
https://www.facebook.com/events/209593959503427/
Sorry, thought you were on the invite list...all day today, whenever you can arrive until 9 or maybe later _________________ erstwhile owner of just about every 924 variant ever made |
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Mike9311
Joined: 14 Dec 2004 Posts: 1678 Location: Chicago-ish
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Posted: Sat Jan 28, 2017 7:00 am Post subject: |
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ideola wrote: | Mike9311 wrote: | ideola wrote: | Mike, I have countless spare wastegates. Are you coming to Fourth Friday this afternoon? You can take one or two back with you for dissection and experimentation. |
Forth Friday? I am missing something |
https://www.facebook.com/events/209593959503427/
Sorry, thought you were on the invite list...all day today, whenever you can arrive until 9 or maybe later |
Oh thats cool
I have a cold that settled in yesterday kicking my butt but this is good to know _________________ 1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car |
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Rasta Monsta
Joined: 12 Jul 2006 Posts: 11723 Location: PacNW
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Posted: Sat Jan 28, 2017 12:55 pm Post subject: |
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ideola wrote: | Sorry, thought you were on the invite list... |
Awkward!
_________________ Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
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Mike9311
Joined: 14 Dec 2004 Posts: 1678 Location: Chicago-ish
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Posted: Sun Jan 29, 2017 6:18 am Post subject: |
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Rasta Monsta wrote: | ideola wrote: | Sorry, thought you were on the invite list... |
Awkward!
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Not really I am on facebook only by proxy and I wasn't updated. I check every now and then and simply missed it.
I knew Dan wanted to do this but I figured in the Spring. He started early and I like the idea _________________ 1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car |
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