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#1
08-02-2014, 02:38 PM
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Glue or Gasket?
I need to install 3/8" valve cover spacers to the heads. I'm undecided whether to glue the spacers directly to the heads (without a gasket) or to use a gasket between the spacers and the heads. What have you guys done? Thanks.
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#2
08-02-2014, 04:13 PM
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I would use a bead of black or blue silicone.
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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
08-02-2014, 04:58 PM
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I've always used a gasket secured by gray perma-tex between the spacer and the cylinder head.
Jim
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65 Catalina sedan. Allen Thomas Performance 495. KRE Heads at 310cfm ported by SD Performance, ProSystems Dominator carb on ported Victor intake, P-Dude custom grind hydraulic roller, MSD ignition, 3.50 Moser/Ford rear. F-Glass front bumper by son Rob, rear by the old man and joint effort for trunk lid. 3950# w/driver. Best of 9.5761/139 on 175 shot, 6.01 /114 in 1/8. |
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#4
08-03-2014, 09:17 AM
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Anyone else have experience installing a valve cover spacer?
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#5
08-03-2014, 11:28 AM
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Will you need the extra clearance provided with cork?
Silicone is hard to remove from a rough cast surface like the cylinder head. So on a head bolt re-torque or valve adjust you could make a real silicone mess. I have not used spacers but would probably glue the spacer to cover then use cork to the head. Use studs. Use a mirror to check gasket fitment. I apply a thin film of oil on the head side of the cork gasket for easy removal and can normally be re-used. 
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Bull Nose Formula-461, 6x-4, Q-jet, HEI, TH400, 8.5 3.08, superslowjunk Last edited by Blued and Painted; 08-03-2014 at 11:35 AM. |
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#6
08-04-2014, 06:24 AM
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i used 3/4" spacers from RAR. i put a bead of grey RTV, put the spacers on, tightened them down overnight and then a gasket grey RTV to the VC
i run a vacuum pump on my setup and i have no issues, leaks etc... i have only seen photos of gaskets on both sides, nothing in person. sometimes it can look a little gaudy so to speak that way just be-careful, if you ever plan to run g-braces... tall VC's and spacers will cause an issue <maybe, at least for me it does>. |
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#7
08-04-2014, 08:11 AM
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I use rubber gaskets between both surfaces. Over and over.
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 frittering and wasting the hours in an off hand way.... 1969 GTO, 455ci, 230/236 Pontiac Dude's "Butcher Special" Comp hyd roller cam with Crower HIPPO solid roller lifters, Q-jet, Edelbrock P4B-QJ, Doug's headers, ported 6X-8 (97cc) heads, TKO600, 3.73 geared Eaton Tru-Trac 8.5", hydroboost, rear disc brakes......and my greatest mechanical feat....a new heater core. 
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#8
08-04-2014, 08:37 AM
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Right now I have a gasket between the spacer/head and one between spacer/valve cover. As one of the guys commented two gaskets looks a little gaudy and out of place.
When time permits I'm going to remove the spacers and run a small bead of silicone sealer between spacer/head and do away with one of the gaskets. Looks much better to my eye. Plus 4 gaskets just doubles the chance of a "leaker"................jmho jww |
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