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#1
12-09-2023, 12:31 PM
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Sprint OHC valves seals
Currently doing a 230 ohc sprint engine.
It has dual valve springs on it. Does anyone have a part number for positive valve seals to use on the intake and exhaust valves. Please and thank you. |
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#2
12-09-2023, 01:36 PM
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I have never had one of them apart to know what they use.
Are the O-rings on the valve stems, or like umbrellas on top the valve guides?
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#3
12-09-2023, 06:37 PM
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If using PC seals, I pretty much expect that the heads would need to be machined for them.
__________________
"At no time did we exceed 175 mph.” Dan Gurney's truthful response to his and Brock Yate's winning of the first ever Cannonball Baker Sea-to-Shining Sea... Still have my 1st Firebird 7th Firebird 57 Starchief |
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#4
12-09-2023, 07:50 PM
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Probably need to buy the V8 Guide cutting tool to cut the Guide bosses to .530" or heck no the .50" dia.
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#5
12-10-2023, 08:57 AM
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From what I can tell by looking at a head gasket set for that motor it looks like all the valves use valve stem O-rings, and the 6 intake valves also so use a added seal.
I just can not tell by just the gasket set if these are umbrella type seals which just ride up & down on the stem, or if they are the positive type that would need the tops of the guides to be cut flat and then the OD of the guide would bd cut to .530”.
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
| The Following User Says Thank You to steve25 For This Useful Post: | ||
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#6
12-10-2023, 10:46 AM
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If your head has been rebuilt than it might have solid 1 piece guides like these or in cast iron in which case you would need a .500” OD seal.
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#7
12-10-2023, 03:20 PM
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Did you search the OHC tech section? Lots of OHC experience there.
And Welcome Aboard.
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If it breaks. I didn't want it in the first place. _____________________________________________ 69 GTO \ 72 FIREBIRD \ 1/2 OF A 64 GTO \ 70 JAVELIN \ 52 FORD PU \ 51 GMC PU \ 29 FORD PU \ 85 ALFA ROMEO SPYDER \ A HANDFUL OF ODD DUCATI'S \ 88 S10 LT1 BLAZER & MY DAILY DRIVER 67 SUBURBAN. |
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#8
12-10-2023, 03:45 PM
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I had an OHC-6 or two apart but really don't remember anything but fat cast valveguides like the 60's V8 heads.
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#9
12-12-2023, 02:21 AM
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No seals on the exhaust and o-ring and loose umbrella on the intakes. They can be machined for positive seals, but not factory.
__________________
__________________________________________ "How I learned to stop worrying and love the OHC Pontiac L6"  The Silver Buick- '77 Skylark coupe w/455, SPX, MegaSquirt 3 & TKO-600 (Drag Week 2011, 2012 & 2015!) 1969 Firebird with a turbo'd Pontiac L6 controlled by a MegaSquirt 3 and backed with a microsquirt controlled 4L60e and 4.56 gears! (Drag Week 2018!) |
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