Ticking and Smoking After Leaky Injector Install

[tardcart]

Interesting, do you think the leaky injector washed down the cylinder and caused enough wear to cause piston slap? In my experience piston slap is noticeable under load at low rpm, not at idle? and its worse when hot. strange diagnosis. Upper rod pin wear is worse when cold and is more of a tick. But you dont see that much anymore with improved oiling.

[logscool]

I think whatever the issue is it was definitely caused by the stuck open injector since it started immediately after that. Their diagnosis of the noise makes me at least very confident that it is not upper engine related. The only other thing that would make sense to me would be a slight hydrolock on the #1 cylinder but I'm not sure if it could hydrolock enough to bend the rod on startup with maybe another cylinder firing and not stall the engine out. I don't think the oiling of the bearings or anywhere other than the cylinder wall was compromised since the oil analysis showed the viscosity still being in grade.

Regardless I don't see it really being worth it to rebuild the engine or have it rebuilt so the outcome seems to be the same, just keep running it. The only question would be is there anything I should try to help mitigate the issue, like oil additives.

[abscate]

I doubt it’s piston slap,log. These engines are tough and don’t break easily. Maybe try some noise over internet diagnosis!

[tardcart]

I agree, if its piston slap the only possibility is bent rod, but I can't imagine enough gas accumulating at starting speed to hydrolock, and in this case, or any case of piston slap there would be lower compression in that cylinder.

[logscool]

Maybe try some noise over internet diagnosis!

Alright, here is a short clip I took about a week ago that the noise is pretty apparent in.
https://youtu.be/ojeYvQ9j8xo