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Technical => Engine Tech Forum => Topic started by: 70's Looker on November 24, 2008, 09:30:14 PM

Title: is it going to the birds?
Post by: 70's Looker on November 24, 2008, 09:30:14 PM
well well well, everytime my engine is running at idol and under load it sounds like there are birds signing in the engine-around the engine, to me it sounds like a metal beating on metal sound but everyone else thinks it sounds more like exhaust ive changed exhaust gaskets everywhere and still the damn bird sings, has anyone heard of the heaterboxes rusting inside and have it spitting out the sides of the boxes other than pulling the engine out and doing a good old tear down ( there are no traces of metal when i change oil too)
Title: Re: is it going to the birds?
Post by: Hansk on November 29, 2008, 11:01:17 PM
Lose heads?
Title: Re: is it going to the birds?
Post by: 70's Looker on November 30, 2008, 06:51:37 PM
damn! the one thing i didnt want anyone to ask, i kinda thought it could be that, i had to put a new head on it and kinda guessing that new head has settled now and not tight, im just to lazy to want to pull the engine :laugh:
Title: Re: is it going to the birds?
Post by: BUSDADDY on November 30, 2008, 09:09:02 PM
Done a compression test?
What carbs do you have? (some sqeak at idle)
Sure it's a cylinder and not other things that squeak like distributors?
Tried pulling plug wires one at a time and listening for the noise to stop?

Don't pull it until you find the cause.
Title: Re: is it going to the birds?
Post by: 70's Looker on November 30, 2008, 09:41:01 PM
no gauge compression test, but its still hard to turn over my hand, BUT number 4 was lighter then the rest (head i replaced) stock 30pict 1500cc single port, i used a rod and put it on various parts but could not source the sound with it, i think i will most def pull plug wires now never even thought about that! thanks for the tips as well
Title: Re: is it going to the birds?
Post by: Hansk on December 02, 2008, 08:31:56 AM
Pop the rocker shaft off that side and check if the 4 lower head nuts are lose.