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"The UK,s 2nd Most Easterly Stag" Quad Exhaust- ZF 4 Speed BOX -
A pure guess but the vacuum actuator for the hot cold flap in the air filter box comes to mind…
TerryTerry Hunt, Wilmington Delaware
www.terryhunt.co.uk -
I've take the air box off, and removed the servo pipe and blocked it off , the carb elbows have also been removed . Will try a post another video with all that off but it's still there!"The UK,s 2nd Most Easterly Stag" Quad Exhaust- ZF 4 Speed BOXComment
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Maybe brake servo, or inlet manifold to carb o ring?
Try clamping the servo hose.
NigelComment
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hi nigel, I took the servo hose off added a couple of dowety seals and screwed the bolt back in the inlet manifold
so servo is isolated . Still the noise is there?"The UK,s 2nd Most Easterly Stag" Quad Exhaust- ZF 4 Speed BOXComment
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A nesting Cuckoo in the air filter box?Comment
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The air box has been removed still there"The UK,s 2nd Most Easterly Stag" Quad Exhaust- ZF 4 Speed BOXComment
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It does rather sound to me like some non-return valve which doesn't quite cut the mustard and lets go every few seconds. Brake servo was suggested - can't think off the cuff if there's an NRV in the vacuum line.The answer isn't 42, it's 1/137Comment
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Have you tried to cover parts of the engine with a thick blanket? It should go quieter when covered.
Have you listened under the car? It might point to source.
Care needed!!! (Hot and spinny things)
DaveComment
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Carb pedestal O ring is my guess.
If you rev it slightly, does the noise stay, go, or change?Header tanks - you can't beat a bit of bling.Comment
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Have a listen to this second video, with servo and air box removed
(1) Triumph Stag cuckoo 2 - YouTube"The UK,s 2nd Most Easterly Stag" Quad Exhaust- ZF 4 Speed BOXComment
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Dry oil seal maybe ?Comment
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Something around the fan belts or the fan clutch slipping?Terry Hunt, Wilmington Delaware
www.terryhunt.co.ukComment
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Try a tube to your ear and move the other end to likely places.White 1976 build ("Mk2") only a few modsComment
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That sound like bearing noise to me. Pump?
If it is from drive belts, spray WD40 on them and it should disappear, for a bit
Last edited by DMT; 8 August 2021, 17:22.Comment
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