4

bel-mor · Dec 10, 2017

Finally got the kmember squared away. I took it for a cruise today for a few hrs to make sure it drives ok after my front end nightmare
Lol any way at about 3k rpms it has a lifter noise it's not really a tick the only way I can accurately describe it is, it sounds like a pushrod motor with a solid lifter cam
Is this normal? It has good oil pressure and the oil has no glitter in it BTW.
Thanks in advance

white95 · Dec 11, 2017

4?

Could be the chain tensioners going out. Have you tried to pin point the area of the noise while revving the engine? Front of the engine, mid, rear, etc?

NEURON · Dec 11, 2017

An automotive stethoscope can help with pin pointing the sound.

bel-mor · Dec 12, 2017

It's definitely not a tick. More of a purr. I will post a video tommorow. The more I think about it the more it sounds like a timing chain deal. This is my first mod motor so perhaps I'm over thinking a noise that is normal? Lol

white95 · Dec 13, 2017

bel-mor said:
It's definitely not a tick. More of a purr. I will post a video tommorow. The more I think about it the more it sounds like a timing chain deal. This is my first mod motor so perhaps I'm over thinking a noise that is normal? Lol

They do have a 'sewing machine' type of noise at idle.

NEURON · Dec 13, 2017

I think you might just be hearing the fuel injectors.

DeepList · Dec 16, 2017

Even with a stethoscope, it can still be difficult to pinpoint these sounds. My car was doing something similar, and it sounded like timing chain issues. The stethoscope made it sound like it was on the driver's side, up by the head. I could have swore it was a tensioner or guide failing... come to find out the whoever had the cover off before me didn't tighten the harmonic balancer pulley bolt down to specs. As a result, the sprocket was loose, the keyway was reamed, out and the chain was sloppy.

NEURON · Dec 17, 2017

DeepList said:
Even with a stethoscope, it can still be difficult to pinpoint these sounds. My car was doing something similar, and it sounded like timing chain issues. The stethoscope made it sound like it was on the driver's side, up by the head. I could have swore it was a tensioner or guide failing... come to find out the whoever had the cover off before me didn't tighten the harmonic balancer pulley bolt down to specs. As a result, the sprocket was loose, the keyway was reamed, out and the chain was sloppy.

True but it is like any other tool, sometimes a help and sometimes not. The main problem I have found with using it is I am not familiar enough with the different sounds an engine can make when not right. My first introduction to one was watching a Master Mechanic troubleshoot employing it and the amazingly accurate deductions he came up with using it, me not so much but it has still been a savior though.