Engine Noise

Any topics pertaining to the BMC A-Series engine.

Engine Noise

Postby brendan » Sun Dec 29, 2013 11:49 pm

I know this is a long shot but....

I've got a '60 bugeye with a later 1098cc engine, which is making a noise that I can't identify. It sounds like a loose piece of sheet metal. I've checked everything on the outside of the engine but can't find the culprit, so I think it's internal. The car sat for about 30 years before I bought it and tried to get it back on the road. It's been a challenge as I am by no means a A-H expert.

Could it be the timing chain tensioner? Water pump (doesn't sound like a bearing)? Any ideas on where to look will be greatly appreciated. Also has a bad rear main seal leak if that matters.

Thanks.
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Re: Engine Noise

Postby Charlie Tolman » Mon Dec 30, 2013 1:29 am

Try to locate the source of the noise by placing the end of a wooden stick or dowel, about two feet long, or so, at various locations on the engine, and then place your ear against the other end of the stick. Be careful near the fan, belts, and pulleys.

Also, remove the rocker cover and inspect the valve train. Carburetor dash-pots ?

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Re: Engine Noise

Postby CaptRandy » Mon Jan 06, 2014 12:20 pm

I found one on my 66. It was the fan shroud that was just a bit out of round. The fan did not hit all the time, can't figure why but when I pulled on shroud the noise went away.
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Re: Engine Noise

Postby Sprite33 » Mon Jan 06, 2014 3:04 pm

I can think of a couple things that could possibly cause this. A loose timing chain that slapping the timing chain cover or a loose oil baffle in the oil pan. The oil baffle should be dampened by the oil but could still be heard. The sprockets may not be shimmed correctly and the timing chain could be rubbing the cover because of that. The oil slinger could also be a source of rubbing if the wrong one is used or installed incorrectly.
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Re: Engine Noise

Postby Asolepius » Thu Feb 20, 2014 5:54 am

I had a similar noise once - it was a cracked water pump pulley.
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