Screaching from behind balancer

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Flyinbrian72duster

Flyinbrian72duster

Dart and duster
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Ok so I did a timming chain all whent well even drove it awhile til now I'm getting a screaching sound behind the balancer took the belts off and ran it it's for sure behind the balancer my guess oil slinger I know I put it on right anyone ever had this problem
 
Do you have one of the tensioners on it? It may have come apart.
 
nm9stheham said:
Did the damper bolt get torqued all the way to 135 ft lbs? I wonder if it did not get fully seated and the crank sprocket has moved. The lip of the slinger points forward. Here is a related thread:
Oil Slinger hits timing chain
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Yea I even removed the damper and reinstalled it torqued to 135 I even measured from the slinger to end of crank and marked the balancer befor I removed it and checked it and it should be right up on it
 
I've had a front seal squeek a couple of times. Try squirting some atf behind the balancer, ya I know...it makes a mess. You can also add a half quart of atf to your engine oil. The rubber conditioners in atf may lube the seal. It worked for me when I got squeeling.
 
grimreaper said:
I've had a front seal squeek a couple of times. Try squirting some atf behind the balancer, ya I know...it makes a mess. You can also add a half quart of atf to your engine oil. The rubber conditioners in atf may lube the seal. It worked for me when I got squeeling.
Click to expand...
 
grimreaper said:
I've had a front seal squeek a couple of times. Try squirting some atf behind the balancer, ya I know...it makes a mess. You can also add a half quart of atf to your engine oil. The rubber conditioners in atf may lube the seal. It worked for me when I got squeeling.
Click to expand...
Can't be that easy for me
 
You put the slinger on backwards. Done it myself. More than once.
 
My 340 hillbilly motor had a flat washer on the cam instead of the cupped one.
That allowed the fuel pump ecentric to rub the front cover from time to time. I thought it was a rod bearing squealing.
 
had one of the pulley bolts on my aluminum pulleys pull into the groove for the one odd bolt hole before. just enough threads came threw the balancer to rub on the cover. thin washer and the squeal went away. since you have the belts off, pull the pulley off and give it a try.
 
First engine replacement as an apprentice, started it up, hi pitched squeel, mentor walked by, squirted some oil behind balancer at crank seal, - noise quit, - mentor kept walking.
Learned about lubing new seals that day .
 
vitamindart said:
had one of the pulley bolts on my aluminum pulleys pull into the groove for the one odd bolt hole before. just enough threads came threw the balancer to rub on the cover. thin washer and the squeal went away. since you have the belts off, pull the pulley off and give it a try.
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Tried it still there
 
inertia said:
First engine replacement as an apprentice, started it up, hi pitched squeel, mentor walked by, squirted some oil behind balancer at crank seal, - noise quit, - mentor kept walking.
Learned about lubing new seals that day .
Click to expand...
I oiled the seal when I put it together the balancer is off now think I'm gonna oil it with trans fluid and try that first
 
I had an aftermarket balancer that rubbed on the raised aluminum timing marks on the cover. They wore off, no more noise
 
If you put it back together correctly and it's not the oil Slinger installed backwards... like mentioned already, it could very well be the seal squeaking and that you didn't put oil or forgot or thought you did...is my guess.
 
Sometimes , even when the seal is oiled the seal wipes the surface clean and they start squeeling. It's almost hard to believe how much noise the tiny rubber surface can make. I always lube my timing cover seals with ATF after having seals squeel a couple of times and have not had a squeeler since I stared doing that. (knock on wood....)
 
On the cheap, remove the fuel pump and put a bore scope in there and see what is going on.
They are like $35 bucks from Amazon and use your smart phone for a screen.
They work amazingly well, I bought it to see what pistons were in an 72 340 I bought, score, it had dome pistons.
The bore scope is cheaper than tearing it down, and at the same time you can pick up a new fuel pump gasket, they are the same as a small block chevy.
 
I had this with the double roller I installed in my LA. when torqued the balancer snout sandwiches the slinger. If the chain links and pins are wide enough they rub the inner surface of the slinger during rotation ,making a pretty "spirograph" (how old am I)pattern etched into the tin and plenty of squeal. You can try shimming but the pulley grooves will be out of alignment by the time your done.Proofs on my bench, I've also run across the lower water pump bolts being replace with to long of a bolt and rubbing the cam gear. Good luck sir.
 
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