Can't find the tick

[gijoe985]

I have a knock count of 43 whenever I am in the throttle. Free rev or on highway. I can hear a tick when I rev the engine. It is coming from the upper end. I have my cams off. Cams are in spec, my brand new 3rd gen lifters are all pumped up. Could it be rockers? Ideas?

 

[dkalfop]

Interesting, but I would look towards maybe injectors which can cause a ticking noise. If it's more a knock, your in trouble could bearings. Does the tick get louder as you raise the throttle and rpm? Take a video.

 

[gijoe985]

I've never heard of injectors ticking. I guess that could be possible. Everything is new in the engine, but we used the old intake and injectors. Listening with a stethoscope, the ticking sound it definitely coming from the upper and and not the bearings. Maybe I could try swapping out injectors. I have some extra ones. Not sure of their condition, but it may be worth a try.

 

[gijoe985]

So, I will try getting them cams back in and timing belt back on tomorrow. I wish I had a better idea of where the sound was coming from. The sound isn't horribly loud, but I have knock showing up, so I assume that they are related. I would not care if it wasn't for that 43 knock count at all times I press on the throttle...

 

[JacksonAuto]

Did you bleed the lifters before installation or did you install them after they were "pumped up"?

 

[gijoe985]

They were all pumped up before installation...

 

[delta448]

You should always install Hydraulic Lash Adjusters bled down and allow the oil pump to fill them. If you install them pumped up the valve lash is likely to be negative, meaning the valves never fully sit on their seats. In which case the valves are going to remain slightly open until the HLAs sit un-operated long enough to bleed down on their own. Hopefully, they weren't open enough to cause valve interference from I/E or pistons and get the valves bent.

 

[gijoe985]

For what it is worth, I have 150psi compression across my cylinders +/- 1psi. So I assume all of my valves were properly seated.


Good point to mention though. Much appreciated.