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Old 05-13-2005, 09:55 AM   #1
RHDintegXsi
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Default how to check for bent/leaking valves..head is off car

i have a gsr head off the motor already...is there a way i myself can check for bent valves?
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Old 05-13-2005, 01:13 PM   #2
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Default Re: how to check for bent/leaking valves..head is off car (SINFULintegXsi)

pour gasoline into the combustion chamber and see if it leaks out intake/exhaust ports
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Old 05-13-2005, 01:24 PM   #3
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Default Re: how to check for bent/leaking valves..head is off car (Pootie)

or brake cleaner.
i usually put it in the ports and see if it leaks into the comb. chamber.
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Old 05-13-2005, 05:16 PM   #4
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Default Re: how to check for bent/leaking valves..head is off car (mmuller)

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or brake cleaner.
i usually put it in the ports and see if it leaks into the comb. chamber.
That's how I do it too.
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Old 05-13-2005, 05:40 PM   #5
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Default Re: how to check for bent/leaking valves..head is off car (Chiovnidca)

I use paint thinner as it is safer than gasoline but works the same. Do it in a ventilated area.
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Old 05-13-2005, 08:29 PM   #6
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Default Re: how to check for bent/leaking valves..head is off car (WestCoRacer)

Out of curiousity how's putting gasoline in the combustion chamber, less safe?
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Old 05-13-2005, 10:31 PM   #7
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Default Re: how to check for bent/leaking valves..head is off car (Pootie)

ok i did that...now in 3 intake valves there is a slow slow leak...like it will drip maybe twice a minute..does it need new valves? or is there an alternative fix?
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Old 05-13-2005, 10:54 PM   #8
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Default

There is a possibility it could be carbon buildup on the seat or where the valve contacts the seat. Maybe you should find out if the valves are bent or if they just aren't sealing.
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Old 05-13-2005, 11:05 PM   #9
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Default Re: (cruizinmax)

I'm curious, is this how machine shops check for bent valves? Or is the leaking method only checking for worn valve seals?
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Old 05-13-2005, 11:08 PM   #10
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Default Re: (Takumi Fujiwara)

shops vacuum test.
If you have a leak i would take the valve out and check for straightness, if its just carbon and such you could get away by just facing the valves/regrinding the seat; if there is no mushrooming
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Old 05-14-2005, 12:40 AM   #11
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Default Re: (Takumi Fujiwara)

Quote:
Originally Posted by Takumi Fujiwara
I'm curious, is this how machine shops check for bent valves? Or is the leaking method only checking for worn valve seals?
Valve seals and valve seats aren't the same thing. Valve seals have nothing to do with compression leakage. They keep oil from coming past the valve stems.
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Old 05-14-2005, 04:29 AM   #12
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Default Re: how to check for bent/leaking valves..head is off car (SINFULintegXsi)

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Originally Posted by SINFULintegXsi
ok i did that...now in 3 intake valves there is a slow slow leak...like it will drip maybe twice a minute..does it need new valves? or is there an alternative fix?
I'd just pull them out and relap em. Sounds like they should clean right up.
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