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I have been pleased with how my '77 bus has been running lately, but just recently it has a new sound. It is noticeable when accelerating from a standstill. Its kinda a "tinkly" sound.
Someone said he thought it was from a head/cylinder leak and the heads need to be retorqued. Does this make any sense?
What does a head/cylinder leak sound like? Are there any other possible things I should check first?
My biggest concern is that the engine is being damaged.

Joseph

Sounds are really hard to describe. Could be "Ping". You might try to retard the dist from its present position very slightly to see if it helps as right now we are in the season of different formulations of the gas we are getting. A very slight twist will give you a couple of degrees change in advance just to see if it does make a difference. A head in need of retorque will be kind of a "Pop" while accelerating.

Fred

Other things you can check before going to torquing the head would be to check the valve adjustment and check that all the spark plugs are properly seated and sealed.

Try retarding the ignition like 4 degrees and see if that helps make it go away. What is your current timing? Maybe the var advance is sticking. When you are near empty on your gas tank try filling it with premium to see if this makes it go away. Premium is not a solution, but if it goes away you have pre ignition for some reason, which WILL damage your engine, so it is good to hunt down the issue quick

well, I think I might have figured out part of the problem. Somehow someone who should know better gave me the wrong sparkplugs and I think that made a big difference. Also I think that it has been running way to lean. Maybe "pinging"? Been kinda drippy and wet lately and that might have made some difference but with the right plugs and adjusting a little more rich it seems to run strong and I don't hear any strange sounds.