how to check for bent/leaking valves..head is off car

RHDintegXsi · 05-13-2005, 09:55 AM

i have a gsr head off the motor already...is there a way i myself can check for bent valves?

Pootie · 05-13-2005, 01:13 PM

pour gasoline into the combustion chamber and see if it leaks out intake/exhaust ports

mmuller · 05-13-2005, 01:24 PM

or brake cleaner.
i usually put it in the ports and see if it leaks into the comb. chamber.

Chiovnidca · 05-13-2005, 05:16 PM

Quote:

Originally Posted by mmuller

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.

WestCoRacer · 05-13-2005, 05:40 PM

I use paint thinner as it is safer than gasoline but works the same. Do it in a ventilated area.

Pootie · 05-13-2005, 08:29 PM

Out of curiousity how's putting gasoline in the combustion chamber, less safe?

RHDintegXsi · 05-13-2005, 10:31 PM

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?

cruizinmax · 05-13-2005, 10:54 PM

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.

Takumi Fujiwara · 05-13-2005, 11:05 PM

I'm curious, is this how machine shops check for bent valves? Or is the leaking method only checking for worn valve seals?

mmuller · 05-13-2005, 11:08 PM

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

cruizinmax · 05-14-2005, 12:40 AM

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.

Chiovnidca · 05-14-2005, 04:29 AM

Quote:

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.

05-13-2005, 09:55 AM	#1
RHDintegXsi Trial User Garage is empty, add now Join Date: Jan 2004 Location: ...Because i can Posts: 1,768 iTrader Rating: (0)	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?

05-13-2005, 01:13 PM	#2
Pootie Junior Member Garage is empty, add now Join Date: Apr 2003 Posts: 329 iTrader Rating: (0)	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

05-13-2005, 01:24 PM	#3
mmuller Mad Scientist Garage is empty, add now Join Date: Nov 2002 Location: tallafizzy, FL state Posts: 5,827 iTrader Rating: (0)	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. __________________ -2290 DC2= e85 powered -DB2 EFI 101 -- PGMFI.ORG-- crome-- have a question about ducati's? ducati factory trained

05-13-2005, 05:40 PM	#5
WestCoRacer Garage is empty, add now Join Date: May 2005 Location: Los Angeles, CA, USA Posts: 23 iTrader Rating: (0)	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.

05-13-2005, 08:29 PM	#6
Pootie Junior Member Garage is empty, add now Join Date: Apr 2003 Posts: 329 iTrader Rating: (0)	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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05-13-2005, 10:31 PM	#7
RHDintegXsi Trial User Garage is empty, add now Join Date: Jan 2004 Location: ...Because i can Posts: 1,768 iTrader Rating: (0)	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?

05-13-2005, 10:54 PM	#8
cruizinmax Honda-Tech Member Garage is empty, add now Join Date: Jul 2003 Location: Springfield, MO Posts: 832 iTrader Rating: (0)	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. __________________ obd2a p72 ecu, gsr intake manifold. http://hondamarketplace.com/showthre...5#post46281085

05-13-2005, 11:05 PM	#9
Takumi Fujiwara Honda-Tech Member Garage is empty, add now Join Date: Mar 2003 Location: Little Tokyo, CA, USA Posts: 2,091 iTrader Rating: (0)	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?

05-13-2005, 11:08 PM	#10
mmuller Mad Scientist Garage is empty, add now Join Date: Nov 2002 Location: tallafizzy, FL state Posts: 5,827 iTrader Rating: (0)	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 __________________ -2290 DC2= e85 powered -DB2 EFI 101 -- PGMFI.ORG-- crome-- have a question about ducati's? ducati factory trained

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how to check for bent/leaking valves..head is off car