engine pops back thru the exhaust

[alleyk]

460 ford installed new cam lifters and springs(hydraulic) new wiand plugs< what can it be

[mopar1968]

More info, when does it do this, street car, race car :?: :?:



''JUST MY TWO CENT'S WORTH''

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[alleyk]

race car, mostly at idle

[dparker]

Valve staying open or closed.....

[TS1955]

Sounds like ya have a valve or two too tight to me! JMO

TS1955

[dparker]

Sometimes it takes a little while for the lifters to pump up. Make sure you recheck the lash after you run the engine a little while. If there pumped up you should have oil coming off all the rockers.

[mopar1968]

Yeah i would have to agree, back the lash off a bit and see what happens :!: :!:


''JUST MY TWO CENT'S WORTH''

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[justin45]

maybe u didnt degree ur cam right????

[onedragracer]

Your popping through the exhaust because the vavle lash is too tight on the exhaust valves or lobes going flat on the camshaft.