changing valve guide seal.

rowe · 05-25-2017, 06:42 PM

hey guys,,,been a while,,,hope all is good.
have a little question on valve seal replacement.
someone told me that you can do this by pumping up
the pressure in the cylinder an as long as its not
leaking down you can comprees the spring an remove the
clip an change the seal without pulling the head.
now you might be thinkin im crazy for asking this but

is it true?

rowe · 06-01-2017, 05:12 PM

no takers,,,,,pontiac 02 and 3.4 litre v6.

O1GAGT · 06-01-2017, 09:36 PM

Put a rope in the spark plug hole.
With that being said it is going to be a pain trying to remove the springs with the heads on.

rowe · 06-04-2017, 07:27 PM

thanks phil,, something to think about versus
pulling the heads.

Hoover · 06-08-2017, 10:35 AM

I know on an old 350 I did this then again there is more room under the hood. I put the air compressor into the spark plug hole (threaded end) built up some pressure, then I could change the seals for those valves as the air pressure held the valve closed. But its gonna be a PITA to get the back three.

AaronGTR · 06-23-2017, 10:36 AM

Yes, you can hold up valves with air pressure. I've done this more than once. You need to make sure the cylinder you are working on is at top dead center on the compression stroke first, so the valves will be closed when you start. Also that way if the valve did open, it won't drop into the cylinder because it would hit the piston first.

rowe · 06-23-2017, 03:17 PM

thanks Aarongtr,,knew you would chime in there sooner
or later,,,,

05-25-2017, 06:42 PM	#1
rowe Grand Am Lover AKA: Rowe Join Date: Oct 2011 Location: Tampa Fl. Posts: 58 Vehicle: 2002 Grand Am Gt coupe	changing valve guide seal. hey guys,,,been a while,,,hope all is good. have a little question on valve seal replacement. someone told me that you can do this by pumping up the pressure in the cylinder an as long as its not leaking down you can comprees the spring an remove the clip an change the seal without pulling the head. now you might be thinkin im crazy for asking this but is it true?

06-01-2017, 09:36 PM	#3
O1GAGT GAGT - Senior Member AKA: Phil Join Date: Mar 2005 Location: Fort Wayne, IN Age: 34 Posts: 1,101 Vehicle: 2001 Grand Am GT Coupe	Put a rope in the spark plug hole. With that being said it is going to be a pain trying to remove the springs with the heads on. __________________ "The world's best cam combined with a poor set of heads will produce an engine that's a dog. But bolt on a set of great heads even with a poor cam, and that engine will still make great power." ~John Lingenfelter

06-23-2017, 10:36 AM	#6
AaronGTR BlingWithBallz AKA: Aaron Join Date: Aug 2002 Location: Detroit area, MI Age: 40 Posts: 12,234 Vehicle: 2000 Grand Am GT1 2dr	Yes, you can hold up valves with air pressure. I've done this more than once. You need to make sure the cylinder you are working on is at top dead center on the compression stroke first, so the valves will be closed when you start. Also that way if the valve did open, it won't drop into the cylinder because it would hit the piston first. __________________ The few, the proud, the boosted! 13.788 @ 103.73 mph (3/2011) 320 whp and 300 ft/lbs torque. (3/2011) See it here. the total package.

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06-01-2017, 05:12 PM	#2
rowe Grand Am Lover AKA: Rowe Join Date: Oct 2011 Location: Tampa Fl. Posts: 58 Vehicle: 2002 Grand Am Gt coupe	no takers,,,,,pontiac 02 and 3.4 litre v6.

06-04-2017, 07:27 PM	#4
rowe Grand Am Lover AKA: Rowe Join Date: Oct 2011 Location: Tampa Fl. Posts: 58 Vehicle: 2002 Grand Am Gt coupe	thanks phil,, something to think about versus pulling the heads.

06-08-2017, 10:35 AM	#5
Hoover GAGT - Newbie AKA: Alix Join Date: Apr 2016 Location: Williamsport Posts: 14 Vehicle: 99 GT Coupe	I know on an old 350 I did this then again there is more room under the hood. I put the air compressor into the spark plug hole (threaded end) built up some pressure, then I could change the seals for those valves as the air pressure held the valve closed. But its gonna be a PITA to get the back three.

06-23-2017, 03:17 PM	#7
rowe Grand Am Lover AKA: Rowe Join Date: Oct 2011 Location: Tampa Fl. Posts: 58 Vehicle: 2002 Grand Am Gt coupe	thanks Aarongtr,,knew you would chime in there sooner or later,,,,