Discussion
I recently rebuilt my car (again) and its learnt how to whistle... Sounds like a slipping fan belt, but is coming from the crank case. If I open the filler cap, the vacuum is reduced and the whistling stops. To make it extra anoying, it whistles, stops, whistles, stops, almost rythmically.
OK, so there's a little leak somewhere. How do I locate it? Its a Rover V8, and so likely places are the rocker cover gaskets and inlet manifold valley gasket. I've tried just listening for it, but its one of those non-directional kind of sounds. Anyone have any tricks for finding the right spot to blob a bit of sealant?
cheers
OK, so there's a little leak somewhere. How do I locate it? Its a Rover V8, and so likely places are the rocker cover gaskets and inlet manifold valley gasket. I've tried just listening for it, but its one of those non-directional kind of sounds. Anyone have any tricks for finding the right spot to blob a bit of sealant?
cheers
I would hazard a guess at either the dip-stick or crankshaft oil seal(s).
This gives concern quite often on quattro turbo engines as they are subject to engine vacuum and the smooth running relies on it, if the crank seals are on the way out they start to whistle. (sometimes, dixie
)
Of course this may not be your problem
EFA
This gives concern quite often on quattro turbo engines as they are subject to engine vacuum and the smooth running relies on it, if the crank seals are on the way out they start to whistle. (sometimes, dixie
)Of course this may not be your problem
EFA
Edited by phumy on Tuesday 15th July 08:29
Trooper2 said:
Use a mechanics stethescope or a long, hard, plastic handled screwdriver held up to your ear to magnify the sound.
That should help you pin point it. Also check to make sure you don't have any breathers or breather tubes that are plugged up.
No joy with that... The noise can't be heard through a screw driver. Just the usual whirring sounds.That should help you pin point it. Also check to make sure you don't have any breathers or breather tubes that are plugged up.
phumy said:
I would hazard a guess at either the dip-stick or crankshaft oil seal(s).
This gives concern quite often on quattro turbo engines as they are subject to engine vacuum and the smooth running relies on it, if the crank seals are on the way out they start to whistle. (sometimes, dixie)
Of course this may not be your problem
EFA
Its nearly new engine, with only about 1500 miles on it, so I hope its not the crank seals! I've been around the whole engine with a piece of hose help to my ear, trying to pin point it... No luck with that either. If it is the crank seals, I'm guessing its best notto be This gives concern quite often on quattro turbo engines as they are subject to engine vacuum and the smooth running relies on it, if the crank seals are on the way out they start to whistle. (sometimes, dixie
)Of course this may not be your problem
EFA
Edited by phumy on Tuesday 15th July 08:29
sucking air and dust into them, as that'll wear them out for sure.
I ended up drilling out the atmosphere breather to a 1/8" hole. It has a little filter on it, so shouldn't suck in too much crud. This lets enough air in to stop the noise most of the time... maybe I should drill it out a little more? Seems like the only option as I don't like the idea of restricting the vacuum hose!
deetes said:
Is it a flapper or hot wire? If it's a flapper they have an overrun valve, on the back of the plenum, that can make funny noises. You can blank them off apparently.
A Webber. With the vacuum hose coming from the inlet manifold. Is that too much vacuum? It seems that my 1/8" hole is not big enough once the engine is warmed up. Should I just keep lettting more and more air in until the noise stops??
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