"Clacking" noise from engine
Thread Starter
Drifting
Joined: Oct 2001
Posts: 1,699
Likes: 1
From: Westampton NJ
"Clacking" noise from engine
Car runs great under almost all driving conditions. Under this condition, though, there is a clacking sound...
Driving down the highway at speed, and the car is fine, even up and down hills at cruise...it's great. At heavy load (accelerating with secondaries open, mostly uphill) it "clacks." That's the best way to categorize the sound. Is this valve lash that needs to be tightened? I have no idea whether the cam is hyd, solid, or roller (either)...
:smash:
Driving down the highway at speed, and the car is fine, even up and down hills at cruise...it's great. At heavy load (accelerating with secondaries open, mostly uphill) it "clacks." That's the best way to categorize the sound. Is this valve lash that needs to be tightened? I have no idea whether the cam is hyd, solid, or roller (either)...
:smash:
Platinum Supporting Dealership
Joined: Dec 1999
Posts: 6,425
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From: Traveling the US
Re: "Clacking" noise from engine (rainman69)
Racer
Joined: Oct 2001
Posts: 274
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From: Pampa Tx
Re: "Clacking" noise from engine (rainman69)
You can try a couple of things. Either put a can of octane booster in you fuel, or back the timing down a couple of degrees. The latter will decrease you performance a little but is cheaper and will keep the drivability. (at your altitude you already have lost significant performance)
Phlash 72 BB Roadster :seeya
Phlash 72 BB Roadster :seeya
Melting Slicks
Joined: Mar 2000
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From: WANTED: '68 rear valance with b/u light assemblies IM, e-mail, or PM me here. Thanks!
Re: "Clacking" noise from engine (rainman69)
It’s the sound of your pistons slapping against the cylinder walls caused by detonation. Use octane buster and pray the walls aren’t gouged. Keep tabs on oil consumption.
