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> What does this leak sound like (video)
VaccaRabite
post May 24 2008, 08:49 PM
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Okay, a while back I had the #2 exhaust rocker back off while breaking in the engine.

I fixed that, and rebuilt the carbs.

Tonight I reset the valve gap and, ran it for the first time. It runs, but I heard a noise I did not like. There is a leak somewhere on the 1/2 head bank. Watch this video I made. it is me cranking the engine on my test stand. No fuel or spark, only cranking. The spark plugs are in to force compression.

You can hear a "fffffffft, fffffffft, ffffffffft" sound, that I don't think is supposed to be there.
Link to the video on Flickr


Zach
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LowGT
post May 25 2008, 05:08 PM
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Maybe a silly question, but are the spark plugs torqued? I got a noise like that once when I just hand screwed the spark plugs in but didn't torque them.

Sounds like air is being forced past, so I would check anything holding compression. Valves, head gaskets, spark pugs, etc...
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