Flywheel Noise?
Thread Starter
|
New User
Joined: Dec 2012
Posts: 8
Likes: 0
From: Arizona, USA
Flywheel Noise?
I have a "52 239 FH and have gone through the engine replacing all bearings, installed adjustable lifters, etc. all was well. Developed a slight knock. Opened it up, re-tightened
all rods, mains, adj valves, pulled pistons, replaced a questionable wrist pin, pulled all valve guides, etc, etc. Still have "knock". I was told that it may be a warped flywheel???
I have not gone into this area yet because the clutch and tranny are working fine.
Before I chase this dog, is it a valid pursuit?
Any thoughts?
all rods, mains, adj valves, pulled pistons, replaced a questionable wrist pin, pulled all valve guides, etc, etc. Still have "knock". I was told that it may be a warped flywheel??? I have not gone into this area yet because the clutch and tranny are working fine.
Before I chase this dog, is it a valid pursuit?
Any thoughts?
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 784
From: Simi Valley, CA
I've never heard of a warped flywheel knocking and how it possibly could, I dunno. Whoever told you that hasn't a single clue.
A warped flywheel will usually have blue heat marks because heat is what causes it to warp.
A warped flywheel will usually have blue heat marks because heat is what causes it to warp.
Believe Nothing
Joined: Jun 2004
Posts: 7,514
Likes: 398
From: W. Central FL.
I've heard loose flex plates, strange noises. I've heard fuel pumps make strange noises also. Disconnect accessory belt to get a better sound without pumps, generator and fan generating competing noises. Of course, don't run it too long without the cooling system working.
Senior User
Joined: Jan 2012
Posts: 277
Likes: 0
From: Sophia, NC
Perhaps the guy that told you that has had experience with a dual mass flywheel. A dual mass flywheel will knock like heck if there is any miss in the engine by picking up the vibration from the engine.
Concentrate on the engine.
Concentrate on the engine.
Thread Starter
|
New User
Joined: Dec 2012
Posts: 8
Likes: 0
From: Arizona, USA
I have checked the top and bottom for signs of the cause of this rather loud noise. I am now grasping at straws for a solution.
The good news out of all of this is that my 29 year old son, who loves "wrenching" has learned a lot about the ol' flathead while helping his Dad chase this gremlin.
I researched the flywheel idea and got very sketchy "maybe" info. Guess I am just wearing down trying to figure it out.
Thanks for your input.
The good news out of all of this is that my 29 year old son, who loves "wrenching" has learned a lot about the ol' flathead while helping his Dad chase this gremlin.
I researched the flywheel idea and got very sketchy "maybe" info. Guess I am just wearing down trying to figure it out.
Thanks for your input.
Fleet Owner
Joined: Jul 2004
Posts: 27,290
Likes: 1,055
From: NM
Did you run/drive the engine before the rebuild? Was it making that noise? Does it make this knocking under load, idling, or all the time equally? You can eliminate bearings and rotating assembly if it is not different under load.
I put a new clutch PP in mine and it did not quite clear the BH bosses for the trans bolts. It was a pretty hard hit, sounded terrible, but a lesser hit might sound like a knock. Any chance you can record the sound in a video?
I put a new clutch PP in mine and it did not quite clear the BH bosses for the trans bolts. It was a pretty hard hit, sounded terrible, but a lesser hit might sound like a knock. Any chance you can record the sound in a video?
Trending Topics
Thread Starter
|
New User
Joined: Dec 2012
Posts: 8
Likes: 0
From: Arizona, USA
The rebuild was done a couple of years ago, very few miles on it since then (less than 100).
The noise seems to be related to crank speed, not lifters or valves. It is the same all the time, just increases with engine speed.
I have not touched the flywheel, clutch as the rebuild, due to limited shop space was done while the block was still in the truck.
I will use a stethescope "again" to try and isolate the noise.
Thanks
The noise seems to be related to crank speed, not lifters or valves. It is the same all the time, just increases with engine speed.
I have not touched the flywheel, clutch as the rebuild, due to limited shop space was done while the block was still in the truck.
I will use a stethescope "again" to try and isolate the noise.
Thanks
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Fleet Owner
Joined: Jul 2004
Posts: 27,290
Likes: 1,055
From: NM
I think Ray may be on track with the fuel pump diagnosis.
So if the block was in the truck for the rebuild, and the trans was also, did you actually pull the crank, or just replace the bearings with new?
So if the block was in the truck for the rebuild, and the trans was also, did you actually pull the crank, or just replace the bearings with new?