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Engine noise - intermittant clang

Hi Guys

I have a metal clanging noise which only happens after engine warms up (5mins)
seems random/intermittant, one comes then nothing for few seconds, then another, seems to happen more often as engine gets hotter. Then i switch off in case of damage.

also seems to be slight puff of smoke just after happens.
could this be valve to piston? Or maybe sticking valve?

i have had engine out for respray but also fixed an oil leak and whilst had cam chain covers off I did a minor adjustment on valve timing.

This seems to be happening evry time i have her running now. I have a video on Youtube:

https://www.youtube.com/watch?v=bIfI4BX_OFU&feature=youtu.be

Any advice appreciated!
ta Jon


Last edited by spindlycat; 05-16-2020 at 07:36 AM..
Old 05-16-2020, 04:20 AM
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Location: Santa Cruz, CA
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The sticking valve is a good guess but doesn't sound quite right, at least on the video. I sounds higher up on the engine.

I would also check the Pulleys, fan belt, fan, and fan housing and alternator. The fan housing could have a crack.

A compression check would be a good idea. Possibly isolate a bad cylinder.

Best of luck,

Rahl
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Old 05-16-2020, 07:59 AM
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Any scuff marks at the bottom of the fan housing from the fan rubbing? Housings crack and belt tension pulls the alternator/fan down.
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Old 05-16-2020, 08:06 AM
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it would be nice if you make a video from behind seeing the complete back..
from what i hear it could be inside your banana- muffler...
Ivan

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Old 05-16-2020, 08:11 AM
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