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Discussion Starter · #1 ·
Hi

I'm having (hopefully) little issue knock coming from cylinder 1 or 3. It seems to get louder on higher rpm and temp has no effect.
I though that its injector but disconnecting the line doesn't effect the sound. Also shakes on idle. starts without issues.
On idle:

Some rpm:

Doesn't seem to smoke, altho exhaust is in the water so its hard to see.

Any ideas where to start? wouldn't like to pull it since the boat is in the water etc :)

Thinking its lifter.

Ran fine on dry land but first time on the water it shacked a lot on idle and started to knock after little drive.

Also summer in here Finland is really short, so i need quick fix :)
 

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Ex- 6BT Square Body Man
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Doesn't sound "deep" enough to be a rod knock.
I'd pull the valve cover and have a look.

Does the idle change when you disconnect the injector line?
 

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Welcome to DieselPlace

X2^^ I would pull the valve cover and inspect
 

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Maybe broken rocker or rocker button? Id definitely pull valve cover and take a look.
 
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