Engine resonance at 4000 rpm
29-03-2008, 01:48 AM
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Engine resonance at 4000 rpm
I hope this is not a stupid question but we have 2 Cossies (4x4) and they both have this resonance at 4000, is this a characteristic of a Cossie or can something be done about it?
29-03-2008, 08:24 PM
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30-03-2008, 07:51 PM
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Has your actuator got the correct pre-load on it as mine didnt and the wastegate flap was causing noise which travelled down the exhaust.
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30-03-2008, 09:30 PM
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30-03-2008, 10:22 PM
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There's a nut, washers and bolt under the throttle body to secure the tb to the engine mount (or near enough), the washers are "special" dished washers, maybe they're a little slack 
31-03-2008, 07:01 PM
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had the same sort of noise, vibration on mine turned out that the turbo was out of balance ( had a distorted fin on the compresser side ) got the turbo rebuilt and was fine
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