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| Exhaust valves https://forums.tipec.net/viewtopic.php?f=25&t=2573 |
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| Author: | Ezgeezer [ Sun Feb 01, 2009 10:50 am ] |
| Post subject: | Exhaust valves |
I’ve just pulled the head to bits on my 91 turbo ready to have new guides fitted and noticed that the exhaust valves appear to have a cream coloured coating, It is not in very good condition but what remains is extremely hard, would I be correct in assuming this is a ceramic coating ? |
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| Author: | 944 Man [ Mon Feb 02, 2009 1:56 am ] |
| Post subject: | Re: Exhaust valves |
Edited as I misread: the exhaust ports are ceramic lined. The valves differ in that they are sodium filled; as were the 924 Turbos. |
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| Author: | Richy_S [ Mon Feb 02, 2009 10:03 pm ] |
| Post subject: | Re: Exhaust valves |
No - more likely to be carbon, same colour as plugs with a rough finish. A light bead blast will clean them up. Rich |
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| Author: | Ezgeezer [ Wed Feb 04, 2009 4:36 pm ] |
| Post subject: | Re: Exhaust valves |
Thanks, I can be more aggressive with them now without worrying about destroying them. |
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