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#1
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KRE 290-295 heads by SD
Trying to get hold of dave for some info, assume hes busy, any that has these heads, im looking to get new viton seals..............cant seem to find the size on these.
Thease heads are from 2010 with about 25 thou miles on them.............having the motor redone with my oil issues..........dont know if the seals are bad or not, just thought i would get them just in case...............another thought if getting new seals, does it pay to get springs and guides also. Thanks Rich |
#2
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You can check the seat pressure on springs and see if they have lost much vs replacing them automatically. And check how the guides feel if excessive wear. If down that far I would replace the seals.
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
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#3
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There’s two questions that need to have a answer, and I can resolve one for you,
You need seals for 11/32” valve stems, but the 2nd part that I can’t answer is if the guides are are sized for seals that are .530” ID, or if they have been cut drown to .500” If the heads have solid guides then you will need the .500” seals. Comp cams sells both. Any time you disassemble the heads and the in doing so the valves get pulled out through the seals, then new seals should be installed! It’s cheap insurance. Also good oil control calls for good seals and good valves. If your machinist finds any valve stems that are worn more then .001” then they should get replaced, and replace with valves with hard chromed stems like the factory builds with. And the same with .001” or more worn valve guides.
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I do stuff for reasons. Last edited by 25stevem; 10-18-2022 at 07:04 PM. |
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#4
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Quote:
Out of curiosity , should all this stuff be going out of whack with so little miles, 20 some thousand. Rich |
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#5
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Precision sized guides
High flowing multi angle valve job on our Rottler SG8 seat and guide machine Ferrea stainless steel valves with multi angle cuts for better off the seat flow Chrome moly retainers with 10 degree locks Viton seals on intake and exhaust guides, for the best oil control available This i got off SD website..........not much help there...........hopefully i can get hold of Dave soon..........unless someone has this info handy, i can find any of my stuff. Rich |
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#6
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Put down the beer and found this.........Maybe25 steve can figure this out.
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#7
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Rich, just call KRE and ask them
They will know right off the top of there head, no pun intended.
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I do stuff for reasons. |
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#8
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Quote:
Rich |
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#9
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They don't make the 99893 springs anymore. As far as valve seals, can't you remove one and measure it. There are lots of sources for valve seals. A replace spring for the Crane 99893 is a Howard 98445.
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68 Firebird. IA2 block, 505 cu in, SD Performance E-head, Solid roller 3600 weight. Reid TH400 4:11 gear. 29" slick. Best so far 9.95@134 mph. 1.43 60 ft. 76 Trans am, TKX .81 o/d, 3.73 Moser rearend, 468 with KRE D-ports, Doug headers, 3" Exh. |
#10
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Quote:
Called KRE, they said the vinton seals are 11/32........530 Rich |
#11
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Just was reading this on Crane website.. on seals. https://www.cranecams.com.au/index.p...ew-viton-seals
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68 Firebird. IA2 block, 505 cu in, SD Performance E-head, Solid roller 3600 weight. Reid TH400 4:11 gear. 29" slick. Best so far 9.95@134 mph. 1.43 60 ft. 76 Trans am, TKX .81 o/d, 3.73 Moser rearend, 468 with KRE D-ports, Doug headers, 3" Exh. |
#12
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The PSI spring CT1225ML maybe another spring for replacement. There are a few slight differences. Would need professional head guy to confirm.
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68 Firebird. IA2 block, 505 cu in, SD Performance E-head, Solid roller 3600 weight. Reid TH400 4:11 gear. 29" slick. Best so far 9.95@134 mph. 1.43 60 ft. 76 Trans am, TKX .81 o/d, 3.73 Moser rearend, 468 with KRE D-ports, Doug headers, 3" Exh. |
#13
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Hey Chuckies...........thanks for the info, so far it looks like those crane seals are all on back order.
Rich |
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#14
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These guys have lots of seal too. https://www.cvproducts.com/
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68 Firebird. IA2 block, 505 cu in, SD Performance E-head, Solid roller 3600 weight. Reid TH400 4:11 gear. 29" slick. Best so far 9.95@134 mph. 1.43 60 ft. 76 Trans am, TKX .81 o/d, 3.73 Moser rearend, 468 with KRE D-ports, Doug headers, 3" Exh. |
#15
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The comp cams # for those seals is 529-16
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#16
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Hey thanks guys, i finally got it figured out............didnt take all day.......yeah, it did.
Rich |
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#17
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I have a good set of 99893's if needed.
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466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2 373 gears 3200 Continental Convertor best et 10.679/127.5/1.533 60ft 308 gears best et 10.76/125.64/1.5471 |
#18
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Hey ta, if in no rush, could you hang onto those, i havent heard anything from the shop yet..........who knows when he is gonna start checking things out.
Rich |
#19
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Yes will do.
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466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2 373 gears 3200 Continental Convertor best et 10.679/127.5/1.533 60ft 308 gears best et 10.76/125.64/1.5471 |
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