| Author | Topic |
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Location:
Brisbane
Registered:
February 2003
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 Rattle sound in 18R head when revved to over 2K
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Sun, 22 June 2003 08:20
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hi folk,
my trusty turbo-18R has picked up an worrying vibration/rattle in its head.
When you rev it to over 2K then either let throttle shut of simply hold it at that speed, it picks up a nasty, sharp rattle/vibration (like 1/2" socket extension vibrating on loose air-cleaner cover when left there by accident). Other sound that came to mind was a mower with oversized blades.
Have lifted the rocker cover - all the gaps look kinda OK [can't find my measuring gauges ;( ] and there's no broken edges on valve stems or cam follower tappets. Cam chains are tight. There's a lot of blowby or petrol fumes polluting the oil as at the last oil change, it was v.black from only 4200K od driving (i change evey 5000k). Is using way too much petrol at the moment.
The engine has lost power - the turbine whistle is only audible at over 0psi boost (used to hear it spool up when heading towards positive manifold pressure). There's no oil smoke or other exhaust signals - but the turbo housing isn't radiating a huge amount of heat (as per usual) tho is still v.hot. Manifold vacuume at idle has dopped (from >20mmHg, to about 16-18mm).
My gut feeling is that one-or-more valve guides is stuffed - or even worse, the lack of leaded petrol (i usually run Prem UL with a tank of LRP every 5th or 6th tank) has buggered the valve seats. The intake turbine appears to be OK (had to look down carbi at it.
I was going to contact with Cool1's mobile mech Trevor Horsnell - but any suggestions/similar experiences???
tia
charles
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| | Subject | Poster | Date |
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Rattle sound in 18R head when revved to over 2K
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thechuckster | Sun, 22 June 2003 08:20 |
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Re: Rattle sound in 18R head when revved to over 2K
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M.W.P. | Sun, 22 June 2003 08:31 |
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Re: Rattle sound in 18R head when revved to over 2K
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THE WITZL | Sun, 22 June 2003 08:43 |
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Re: Rattle sound in 18R head when revved to over 2K
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M.W.P. | Sun, 22 June 2003 15:00 |
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Re: Rattle sound in 18R head when revved to over 2K
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ehendrikd | Sun, 22 June 2003 23:44 |
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Re: Rattle sound in 18R head when revved to over 2K
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thechuckster | Sun, 22 June 2003 09:58 |
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Re: Rattle sound in 18R head when revved to over 2K
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trent_kershaw | Sun, 22 June 2003 10:11 |
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Re: Rattle sound in 18R head when revved to over 2K
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THE WITZL | Mon, 23 June 2003 00:29 |
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Re: Rattle sound in 18R head when revved to over 2K
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SlatemazZ | Mon, 23 June 2003 02:29 |
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Re: Rattle sound in 18R head when revved to over 2K
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earlyrolla | Mon, 23 June 2003 02:30 |
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Re: Rattle sound in 18R head when revved to over 2K
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simulant | Mon, 23 June 2003 10:36 |
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Re: Rattle sound in 18R head when revved to over 2K
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thechuckster | Mon, 23 June 2003 11:21 |
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Re: Rattle sound in 18R head when revved to over 2K
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M.W.P. | Tue, 24 June 2003 07:49 |
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Re: Rattle sound in 18R head when revved to over 2K
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thechuckster | Tue, 24 June 2003 12:31 |
