Help, Loud engine noise!

[Chevy3+3]

Have you tried the belt dressing several times and everytime the noise stops? To me it definitely sounds drive train related. I'm thinking tranny now. Maybe your timing chain has got slack in it? Are either of your motor mounts broke? If so your motor could be pulling up on one side when under a load. The motor mount might be rattling when lifted a little (just a thought).

[SnowNeck]

Originally Posted by Chevy3+3

Have you tried the belt dressing several times and everytime the noise stops? To me it definitely sounds drive train related. I'm thinking tranny now. Maybe your timing chain has got slack in it? Are either of your motor mounts broke? If so your motor could be pulling up on one side when under a load. The motor mount might be rattling when lifted a little (just a thought).

After trying the belt dressing a few times, it indeed has nothing to do with my belts. oh well a new alternator and water pump isnt a bad thing. But now im thinking transfercase. and how would i check my engine mounts??

[74sqrbdy]

On one of your posts you said it sounds like a mason jar with nuts and bots in it rattling around. Could it be pinging or detonating? Under a load like going uphill is when this happens most. Maybe your timing is too far advanced or you got a realy bad batch of gas.....both of these could cause that type of sound.

[SnowNeck]

Originally Posted by 74sqrbdy

On one of your posts you said it sounds like a mason jar with nuts and bots in it rattling around. Could it be pinging or detonating? Under a load like going uphill is when this happens most. Maybe your timing is too far advanced or you got a realy bad batch of gas.....both of these could cause that type of sound.

I did say it sounds like that, but I will say it sounds like loose rocker arms almost, but, it doesn't make the noise in neutral at all. I can rev it all I want no noise. Also I'll add the noise isn't there when the engine is cold, or the part in which the noise is coming from, I have a long drive home from work and all of it is mostly down hill. I noticed if I am coasting a lot and then have to pull a hill the noise isn't there and then comes back pretty soon. I texted taking a video of it but you can't hear it over the engine. At 1100 rpms is when it starts and at 2000rpms you can hear it over the radio turned all the way up. I've never been so stumped in my life