5.7 Engine Noise

Cowboy09 · June 25, 2008

I've got a 90 Scottsdale with a 5.7 and manual transmission and I'm trying to cut down on engine noise as much as possible. I know there's a certain amount you can't avoid, but where does it typically come from? It's so loud I can't go through a drive-thru without turning it off! I could try to record it, but I don't know if it would come out well. One sound that I definitely can describe though is an almost clicking noise that happens like when you accidentally shift from 2nd to 5th. This happens when I try to accelerate quickly or at high RPM's. Any ideas? Thanks in advance!

2000DV4.8 · June 25, 2008

Maybe you have an exhaust leak...?

Cowboy09 · June 25, 2008

Well, I already fixed one leak and didn't detect any others, but I'll certainly check again!

L29er · June 26, 2008

i once had a 5.7 in the shop that sounded like well, a ticking time bomb!! drained a pint of oil and dropped in some rislone and an hour later she sounded like new!!! i figured the lifters were gumed up and weren`t getting full pressure, still see that ole girl driving around too, that was years ago!

just an idea, might put you out 15 bucks er something, its a heavy detergent oil, cleans big time,

2000DV4.8 · June 26, 2008

Well, I already fixed one leak and didn't detect any others, but I'll certainly check again!

Check for a leaky exhaust manifold, they can make clicking noises.

L29er · June 26, 2008

Well, I already fixed one leak and didn't detect any others, but I'll certainly check again!

Check for a leaky exhaust manifold, they can make clicking noises.

Controller · June 26, 2008

When i first read the title I laughed thinking there is a pretty good chance it comes from the reciprocating action of the internal combustion engine you have under the hood.

Cowboy09 · June 26, 2008

Very true- it's a loud damn engine anyway. I'm just trying to get it down to the bare noise that it has by itself. In other words, I'm cheap and don't want to have to insulate any more than I have to

Cowboy09 · June 27, 2008

Well, I feel like a dork. Found a small one on the left side coupling. I'm waiting for it to cool down before I mess with it. Once you've had about 20 exhaust burns, you get patient

pennzoil29 · June 29, 2008

Well, I feel like a dork. Found a small one on the left side coupling. I'm waiting for it to cool down before I mess with it. Once you've had about 20 exhaust burns, you get patient

Experience is a good thing. I like the patients thing.

Cowboy09 · July 3, 2008

For anyone who might come back to this, apparently it was missing a donut gasket! I replaced that and now the most noise comes from my fan! Where it used to rumble and roar, the thing practically purrs in the engine compartment and has a gentle rumble from the pipes. It'll get louder once I get the catalytic converter taken care of (20 years of pollution might cause a little backpressure, y'think?). I was looking at doing some serious cab insulation for sound, but now I don't think it'll need much at all.