New engine knocking

[InsanePyro]

I have a reman'd 350 engine with about 8k on it and about a week ago it started knocking at idle once shes warm. Usually only after shes really warm (freeway driving). Definitely from the top end. The oil looks clean on the dipstick. Any ideas? The only one I have is I put the intake on in the middle of winter and maybe the rtv didn't set right? But then I'd think the oil would be dirty or low

 

[Big D]

maybe post a videos of the noise, it could be a bunch of things

 

[Keepinitoldskool]

May just need to adjust your valve clearance.

 

[InsanePyro]

https://www.youtube.com/watch?v=E75NhJdGb28

It never starts to sputter or anything and I never have a loss of power. Just sounds real scarey at idle. All the head adjustments were supposed to have been done by the rebuilder. Also I found that the fan clutch seems to be a bit loose on the post? that bolts to water pump. It doesn't appear to wiggle while running though

 

[InsanePyro]

I've been listening to it more and I think its a bottom end knock

 

[badazzbulldog]

check the torque converter bolts to the flex plate make sure they didnt loosen up,had that happen on a new 454 I put in my 68 Impala about 10 miles into its first run thought the rods were knocking.

 

[InsanePyro]

I unfortunately don't think its gonna be a simple thing like that guys. I did a oil change today and found glitter in the oil. Something isn't going right in there

 

[1997chevydriver]

I know audio sucks trying to diagnose noises online but that noise sounds too deep (tone) to be in the top end.


Sent from my iPhone using Tapatalk

 

[InsanePyro]

I know audio sucks trying to diagnose noises online but that noise sounds too deep (tone) to be in the top end.

Yeah its in the bottom. I was trying to be optimistic. Seems to be loudest by the balancer

 

[Big D]

that sucks man, My buddy bought a rebuilt engine from Promar, and we put it in and it ran good for 20 minutes..... good luck on the warranty, Promar successfully didn't honor threres.