Engine Bay vibration
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Papa Smurf
Joined: Nov 2009
Posts: 1,078
Likes: 204
From: Woodstock, GA
Engine Bay vibration
For a while now I've heard a vibration or rumble in the engine bay. Engine runs smooth. Only leak I have is the front cover and its not much of a leak. Thought maybe the turbo, but took off the tubes, and reached in and found no side to side play.... and from what I read turbo squeal, not vibrate. I was even ready to buy a new turbo, but then I thought I better find out what this noise is first. Would hate to find out my crank was going or something serious after spending money on a turbo.
Noise comes & goes... not a continuous noise. Thinking maybe power steering pump, but no play or leaks... although I reached thru wheel well, and thought the hose was vibrating more than it should, just sitting there idling.
Thought about torque converter, but it was replaced like 40k ago. But noise still sounds up in engine bay to me.
I'll try to get a video of sound tomorrow
Any thoughts ?
Noise comes & goes... not a continuous noise. Thinking maybe power steering pump, but no play or leaks... although I reached thru wheel well, and thought the hose was vibrating more than it should, just sitting there idling.
Thought about torque converter, but it was replaced like 40k ago. But noise still sounds up in engine bay to me.
I'll try to get a video of sound tomorrow
Any thoughts ?
Logistics Pro
Joined: May 2017
Posts: 4,666
Likes: 1,455
From: Muskogee, Ok
Vacuum pump 
Remove your drive belt and spin all the accessories idler pulleys, they seem to be the most common noise generators
Jack up the front axle and check your front tires for out of round from ply separation
Remove your drive belt and spin all the accessories idler pulleys, they seem to be the most common noise generators
Jack up the front axle and check your front tires for out of round from ply separation
Lead Driver
Joined: Apr 2016
Posts: 7,170
Likes: 1,331
From: Bahstun
Remove belt and spin all pulleys.
start it up and see if bottom pulley runs true. If it wiggles at all then balancer is shot. Get a melling oil pump while in there if not done. Just four more bolts. Check water pump shaft and fan clutch for any play.
Check flex plate on trans and TC bolts.
start it up and see if bottom pulley runs true. If it wiggles at all then balancer is shot. Get a melling oil pump while in there if not done. Just four more bolts. Check water pump shaft and fan clutch for any play.
Check flex plate on trans and TC bolts.
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Papa Smurf
Joined: Nov 2009
Posts: 1,078
Likes: 204
From: Woodstock, GA
Has a new belt tensioner, I replaced that when I replaced most of the a/c units.
Took off the belt yesterday, and vibration was still there.
Took cover off flex plate housing, and couldn't see anything that looked cracked, etc. But it seemed to me, that was where vibration was coming from.
So I took it to A1 Transmission in Royston,GA to let them see what they could find. He was a bit perplexed with the vibration too. Maybe torque converter, but we'll just have to see. They replaced my tranny about 50,000 miles ago. Was a 90+ mile drive, all the while wondering will it blow up before I get there in this crazy Atlanta traffic Another 10 miles I'd have been at Sous's house...
Will just have to wait and see.
Oh... took it to local diesel shop Tuesday. Asked about costs for front cover seal or whatever is leaking in front of engine. And the vibration issue. Two weeks for an appointment.... maybe 3 weeks for repairs after that. Geezzz
But then he lost my business when he said they've have to pull engine to replace the front seal, etc.... uh... I don't think that is necessary.
Took off the belt yesterday, and vibration was still there.
Took cover off flex plate housing, and couldn't see anything that looked cracked, etc. But it seemed to me, that was where vibration was coming from.
So I took it to A1 Transmission in Royston,GA to let them see what they could find. He was a bit perplexed with the vibration too. Maybe torque converter, but we'll just have to see. They replaced my tranny about 50,000 miles ago. Was a 90+ mile drive, all the while wondering will it blow up before I get there in this crazy Atlanta traffic Another 10 miles I'd have been at Sous's house...
Will just have to wait and see. Oh... took it to local diesel shop Tuesday. Asked about costs for front cover seal or whatever is leaking in front of engine. And the vibration issue. Two weeks for an appointment.... maybe 3 weeks for repairs after that. Geezzz
But then he lost my business when he said they've have to pull engine to replace the front seal, etc.... uh... I don't think that is necessary.
Hotshot
Joined: Jul 2008
Posts: 12,782
Likes: 2,142
From: N.GA Mountains
But, to reseal the front cover requires oil pan to come off and that does mean engine R&R.
Cracked flex plate can make HELLACIOUS noise. It can be a low grumble that resembles loose main bearings or a high pitched growl/roar that is nearly deafening. You can’t see this problem until removing TC (transmission). Can’t really say I’ve observed one causing a vibration though...
Is there rubber poking out of harmonic balancer? Does it look round/true when it spins?
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FTE Leadership Emeritus
Joined: May 2014
Posts: 27,344
Likes: 5,941
From: Lake Hartwell, GA
So I took it to A1 Transmission in Royston,GA to let them see what they could find. He was a bit perplexed with the vibration too. Maybe torque converter, but we'll just have to see. They replaced my tranny about 50,000 miles ago. Was a 90+ mile drive, all the while wondering will it blow up before I get there in this crazy Atlanta traffic Another 10 miles I'd have been at Sous's house... Will just have to wait and see.
Will just have to wait and see.We used to go to Royston for Chinese takeout before Hartwell was lucky enough to have a place open up. Drive safe Bill, people are crazy on the roads and more so during the holidays.
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Papa Smurf
Joined: Nov 2009
Posts: 1,078
Likes: 204
From: Woodstock, GA
The ‘front seal’ is the LPOP and harmonic balancer. But, to reseal the front cover requires oil pan to come off and that does mean engine R&R. ugh....
Cracked flex plate can make HELLACIOUS noise. It can be a low grumble that resembles loose main bearings or a high pitched growl/roar that is nearly deafening. More or less what I meant... lets not talk main bearings.... geezzz
Is there rubber poking out of harmonic balancer? Does it look round/true when it spins? It looked fine to me
Guess I'll know more when they pull tranny
Cracked flex plate can make HELLACIOUS noise. It can be a low grumble that resembles loose main bearings or a high pitched growl/roar that is nearly deafening. More or less what I meant... lets not talk main bearings.... geezzz
Is there rubber poking out of harmonic balancer? Does it look round/true when it spins? It looked fine to me
Guess I'll know more when they pull tranny
Thread Starter
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Papa Smurf
Joined: Nov 2009
Posts: 1,078
Likes: 204
From: Woodstock, GA
Got my truck back from A1 Transmission. Bad Flex Plate and replaced Torque Converter. Vibration is gone.... everything seems to shift smoother, firmer... maybe this has been a slow long time problem that finally got bad enough to know something was wrong.
On to the next project...
On to the next project...
Thread Starter
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Papa Smurf
Joined: Nov 2009
Posts: 1,078
Likes: 204
From: Woodstock, GA
Laughing Gas
Joined: Jun 2013
Posts: 1,083
Likes: 511
From: Yokosuka Japan
I have heard that a taser, or pepper spray works wonders...remember the best defense is a good offense. I like Offence
cheers
cheers
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