loud valve users....
09-06-2018, 06:35 PM
#5
Teching In
Join Date: Jan 2007
Location: Tyler,Tx
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I’m glad I’m not the only one. Mine leak little puffs at idle and now have a slight rattle. If I grab the arm and pull it tighter they seal off, but no adjustments made corrected it.
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09-07-2018, 01:48 PM
#10
I've been thinking about this, because a solution is sorely needed. In 1969 GM added a coil spring to the truck area of the Camaros to cut down on rattling so im thinking if we added a well aged vacuum spring bolt on the rear of each head like a knock sensor type deal, that ought to absorb the loud valves.
09-12-2018, 09:49 AM
#13
Was just looking at my normally closed valves last night. Yours don’t have an adjustment on them? They should already be pre-spring loaded closed with the spring in the diaphragm. Should just be able to tighten up that adjustment? I dunno mine were $60 straight from china and I skipped the middle man. Maybe yours don’t have the adjustable rod end?
09-12-2018, 11:45 AM
#14
Was just looking at my normally closed valves last night. Yours don’t have an adjustment on them? They should already be pre-spring loaded closed with the spring in the diaphragm. Should just be able to tighten up that adjustment? I dunno mine were $60 straight from china and I skipped the middle man. Maybe yours don’t have the adjustable rod end?
[img] https://image.made-in-china.com/43f34j00iOsazWBPgbuU/Normally-Close-Vacuum-Pneumatic-Exhaust-Valve-Cutout.jpg
[img] https://image.made-in-china.com/43f34j00iOsazWBPgbuU/Normally-Close-Vacuum-Pneumatic-Exhaust-Valve-Cutout.jpg
09-12-2018, 12:55 PM
#16
yeah I adjusted the hell out of mine. Actually broke the first one---couldnt get a replacement diaphragm---and bought one from ali express. It was the exact same unit lol I bet i could fingerprint them both and come up with the same 12 year chinese girl 
It just rattles badly at idle, i'd adjust it and it'd be fine for a few days and begin to rattle again. My guess is the preload spring gets hot and looses uh, springyness
Added a random spring from a carburetor spring kit and it's enough I don't hear it so I'm cool.
That is a neat fix you came up with tho.
It just rattles badly at idle, i'd adjust it and it'd be fine for a few days and begin to rattle again. My guess is the preload spring gets hot and looses uh, springyness
Added a random spring from a carburetor spring kit and it's enough I don't hear it so I'm cool.
That is a neat fix you came up with tho.
