valve stem seals?

blazerguy89 · 10-08-2008, 03:10 PM

ok guys i went to the auto parts store to get a set of valve stem seals and they come in 2 different sets ( int and exh ) and they are around $20 a set. they said they were 2 differant sizes? what is the size difference between the exh valve and int valve stem. i only am goin to replace 2 cylinders right now since i am replacing the engine within the next year.

blazerguy89 · 10-08-2008, 11:24 PM

any know?

01cherryreds10 · 10-08-2008, 11:26 PM

Intake valve is bigger than exhaust valve.

Yogi · 10-09-2008, 02:03 PM

Intake and exhaust valves are different sizes but I thought that the valve stems were the same. Maybe there is something different about the bosses on the heads that are different.

MINTSICK · 10-09-2008, 02:05 PM

Valve sizes are different but the stems are the same size, hence the valve seals are the same for intake & exhaust. Did you ask what the difference between the two sizes were? Maybe the valve guide diameters changed between the earlier 4.3's and later ones.

blazerguy89 · 10-09-2008, 06:12 PM

thats what i thought, i figured that the stems would be the same sizes and obviously the valves would be different.. i asked them but they could not tell me what the difference was.

MINTSICK · 10-10-2008, 12:34 AM

Quote: Originally Posted by blazerguy89

thats what i thought, i figured that the stems would be the same sizes and obviously the valves would be different.. i asked them but they could not tell me what the difference was.

No surprise there.

blazerguy89 · 10-13-2008, 07:58 PM

does anybody know what the valve stem sizes are for a 89 4.3L. iv came to a conclusion they are either 11/32 or 5/16. i look on summit and the 5/16 are the only ones that the application guide has 4.3L under but a summit tech told me they were 11/32?? im confused

bg's · 10-13-2008, 10:28 PM

You could ask here. I'm pretty sure they'd know..

www.raceprovenmotors.com
http://www.sytyperformance.com/index...d=26&Itemid=68

10-08-2008, 03:10 PM	#1
blazerguy89 Bowtie Performance Age: 20 Join Date: Jul 2008 Posts: 116 Location: Kang, NC User is: OffLine	valve stem seals? ok guys i went to the auto parts store to get a set of valve stem seals and they come in 2 different sets ( int and exh ) and they are around $20 a set. they said they were 2 differant sizes? what is the size difference between the exh valve and int valve stem. i only am goin to replace 2 cylinders right now since i am replacing the engine within the next year.
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10-08-2008, 11:24 PM	#2
blazerguy89 Bowtie Performance Age: 20 Join Date: Jul 2008 Posts: 116 Location: Kang, NC User is: OffLine	Re: valve stem seals? any know?
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10-08-2008, 11:26 PM	#3
01cherryreds10 Wanna see some magic? Age: 18 Join Date: Jan 2007 Posts: 3,748 Location: Illinois User is: OffLine	Re: valve stem seals? Intake valve is bigger than exhaust valve.
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10-09-2008, 02:03 PM	#4
Yogi Registered (Ab) User Join Date: Feb 2008 Posts: 3,667 Location: League City, TX (Houston) User is: OffLine	Re: valve stem seals? Intake and exhaust valves are different sizes but I thought that the valve stems were the same. Maybe there is something different about the bosses on the heads that are different.
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10-09-2008, 02:05 PM	#5
MINTSICK Master's Apprentices Age: 26 Join Date: Oct 2003 Posts: 11,245 Location: Lynnfield, Ma User is: OffLine	Re: valve stem seals? Valve sizes are different but the stems are the same size, hence the valve seals are the same for intake & exhaust. Did you ask what the difference between the two sizes were? Maybe the valve guide diameters changed between the earlier 4.3's and later ones.
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10-09-2008, 06:12 PM	#6
blazerguy89 Bowtie Performance Age: 20 Join Date: Jul 2008 Posts: 116 Location: Kang, NC User is: OffLine	Re: valve stem seals? thats what i thought, i figured that the stems would be the same sizes and obviously the valves would be different.. i asked them but they could not tell me what the difference was. Last edited by blazerguy89 : 10-09-2008 at 06:13 PM.
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10-10-2008, 12:34 AM	#7
MINTSICK Master's Apprentices Age: 26 Join Date: Oct 2003 Posts: 11,245 Location: Lynnfield, Ma User is: OffLine	Re: valve stem seals? Quote: Originally Posted by blazerguy89 thats what i thought, i figured that the stems would be the same sizes and obviously the valves would be different.. i asked them but they could not tell me what the difference was. No surprise there.
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10-13-2008, 07:58 PM	#8
blazerguy89 Bowtie Performance Age: 20 Join Date: Jul 2008 Posts: 116 Location: Kang, NC User is: OffLine	Re: valve stem seals? does anybody know what the valve stem sizes are for a 89 4.3L. iv came to a conclusion they are either 11/32 or 5/16. i look on summit and the 5/16 are the only ones that the application guide has 4.3L under but a summit tech told me they were 11/32?? im confused
	[Reply w/Quote]

10-13-2008, 10:28 PM	#9
bg's SoCal Football Join Date: Jun 2002 Posts: 7,547 Location: Who cares.. User is: OffLine	Re: valve stem seals? You could ask here. I'm pretty sure they'd know.. www.raceprovenmotors.com http://www.sytyperformance.com/index...d=26&Itemid=68
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