• When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

Engine Knock???

eagleone1983 said:
Another case of loose flex plate bolts. They sure did cause a lot of noise for only being about a turn or two loose. Knocking is gone, I guess that 496 stroker is going to have to wait
Click to expand...
Hmmm.....
You should be thanking these people:

Beekeeper said:
That kinda sounds like a loose flex plate sure sounds external to the engine
Click to expand...

pnora said:
That is a floating multiple rattle type noise. A noise not associated with a rod or piston. As mentioned check the flex plate. Also check the crank pulley.
Click to expand...

pnora said:
Did you inspect the flex plate? I assume it is an automatic.
Click to expand...

Lefty71 said:
Take a cut off broomstick about three feet long and start her up, listening around the motor with it.... you have to lay the one end right against your head, and see which direction it takes you.... it'll be slapping pretty loud in the bellhousing are if its flexplate related.
Click to expand...

Outlawd said:
I had similar issue with a 440 Cuda years ago, same type of sound at idle. It was the flex plate bolts. Ten minutes to fix, what a relief to find that.
Click to expand...
 
Kern Dog said:
Hmmm.....
You should be thanking these people:
Click to expand...

Post #17, I did. I didn't think I needed to call everyone out by name. But every response whether it was for the flex plate or not is highly appreciated.
 
Lefty71 said:
Good, good..... Now WHY is the big question.
Click to expand...

Seems to be pretty common, the factory manual has the torque value at about 22 ft lbs so it's not much. I'll probably just check them every year or so.
 
eagleone1983 said:
Seems to be pretty common, the factory manual has the torque value at about 22 ft lbs so it's not much. I'll probably just check them every year or so.
Click to expand...

Red Locktite is your friend.... if that doesnt hold them, theres a bigger problem. Glad you're looking the right direction now before you tore the motor down lol :thumbsup::thumbsup:
 
Lefty71 said:
Red Locktite is your friend.... if that doesnt hold them, theres a bigger problem. Glad you're looking the right direction now before you tore the motor down lol :thumbsup::thumbsup:
Click to expand...

Me too, although I think I had the wife on board with a 496 stroker kit if the engine did fail.
 
eagleone1983 said:
Me too, although I think I had the wife on board with a 496 stroker kit if the engine did fail.
Click to expand...

That is awesome! Everytime my wife gets "on board", she brings her Honey-do list with her lol...................
 
Last edited:
Do you have the metal gasket installed between the starter and transmission housing? The converter flex plate bolt heads will rub and knock if the gasket plate is bent.
 
You must log in or register to reply here.

Similar threads

72RobCharger
rebuilt 318 knock noise around 2500
2 3 4
Replies
65
Views
4K
72RobCharger
72RobCharger
furious70
Struggling to find the right oil pressure balance
2 3
Replies
48
Views
4K
Fran Blacker
Fran Blacker
D
Engine Displacement
Replies
14
Views
1K
dart6
D
D
68 Coronet. Slant 6 K-member, 440 engine. Mount options?
Replies
3
Views
336
Curiousyellow71
Curiousyellow71
W
Mystery Mopar engine?
Replies
16
Views
2K
pnora
pnora
Auto Transport Service
Back
Top