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#42878 03/27/2004 4:32 PM | Joined: Feb 2004 Posts: 2 Junior Member | | Junior Member Joined: Feb 2004 Posts: 2 | I'm having a hard time finding NOS exhaust valves for my 302. Does anyone know of any newer valves that will work to rebuild my head? Thanks | | |
#42879 03/27/2004 8:31 PM | Joined: Feb 2000 Posts: 9 Member | | Member Joined: Feb 2000 Posts: 9 | Did you try the vendors on the "links" page on this site? Seems like there are a few GMC oriented one's.........Patrick's maybe?
Otherwise, try egge.com......lot's of old stuff available from them. | | |
#42880 03/28/2004 6:50 AM | Joined: Feb 2004 Posts: 29,771 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,771 | I have several older TRW and Perfect Circle engine parts catalogs at my shop in Nashville. They have a "specifications" section that gives dimensions of engine parts such as pistons, valves, etc. I was able to match up some valves for an older Oliver tractor that way, but we had to change the valve guide size. I'll check into possible interchanges when I get to work Monday.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
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#42881 03/30/2004 4:41 AM | Joined: Jan 2000 Posts: 206 Member | | Member Joined: Jan 2000 Posts: 206 | Most performance rebuilds on 302 heads include installation of Chevy V8 intake and exhast valves. 1.94 intake and 1.5 or 1.6 exhausts. This is only a modest increase over stock - You will need hardened seats in the exhaust anyway, and the Chevy seats are readily available. Any additional cost for reaming guides or cutting new spring seats should be offset by the dirt-cheap cost of the valves. Check with your machinist and weigh the options. | | | | | Joined: Feb 2008 Posts: 2 Moderated | | Moderated Joined: Feb 2008 Posts: 2 | I know the 1.94 and 1.6 sbc valves will work but can some one give me a idea how long of valve they used ?
Thanks
| | | | | Joined: Feb 2004 Posts: 29,771 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,771 | Hmmmm- - - - -a 14 year old zombie thread returns! Why not measure your 302 valves and start from there? Or is this just some sort of hypothetical question?
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Feb 2008 Posts: 2 Moderated | | Moderated Joined: Feb 2008 Posts: 2 | I did mic how long the valves are. Sbc Chevy are to long or to short and I wanted to know which ones there using ? With out grif of blocks under or cutting the rocker stands to correct rocker angle. | | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | There is info on adding a ff oil filter on 'Inliners'.
Ed
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
| | | | | Joined: Oct 2006 Posts: 1,847 'Bolter | | 'Bolter Joined: Oct 2006 Posts: 1,847 | | | | | | Joined: Apr 2005 Posts: 2,832 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,832 | Valve stems are easy to shorten and new keeper grooves can be cut on a lathe. They are NOT hard as if brittle they would snap in two. A motorcycle shop used to bring us 390 Ford valves that fit some old Harley and we would shorten them---a lot, and cut new keeper groves. On race engines we got long stem valves and cut them so the rocker roller was on the exact center of the valve stem at half lift. Using off the shelf stuff sometimes had the roller running off the end of the stem and onto the retainer.
Evan
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