TSB for heat shield noises.....
Thread Starter
|
Posting Guru
Joined: Jun 1999
Posts: 1,525
Likes: 1
TSB for heat shield noises.....
I read the TSB for noises related to loose heat shield in the exhaust system........basically just add a pair hose clamps around the main converter and the muffler..............my truck may have this problem..........at idle in fwd gear....with or without the a/c on ....sometimes I will get a "buzzing type of vibration".......it will stop if you move to neutral.....and it doesn't do it all the time in drive.........it always goes away as soon as you let go the brake and begin moving..........it may return when you stop at a traffic light....it does sound like it is an exhaust sheild problem........does any one ever experienced something simular ?
Thanks in advance,
Phil
Thanks in advance,
Phil
Hotshot
Joined: Jan 2004
Posts: 19,762
Likes: 1,079
From: St Louis
Turn the truck off, grab a rubber mallet, and crawl under there. When you tap the loose exhaust pipe or shield, you'll know it.
Use stainless clamps to prevent future repairs.
Way too common.
Steve
Use stainless clamps to prevent future repairs.
Way too common.
Steve
New User
Joined: Sep 2010
Posts: 5
Likes: 0
I have the ringing noise at about 700 rpm regardless if the truck is moving or not. I also have a vibration which sounds like the cats are vibrating/buzzing from the inside and it resonates all the way to the rear of the truck at times. The entire exhaust system shakes alot due to the low and sometimes rough idle of the V-6. This is only in drive and stoppd at idle. I had the cat heat shields welded but still, no change. I put a hammer between the muffler mount and the ground and the vibration stopped completely. Are these mounts bad or is it the cats? Looking to put a cat-back dual outlet muffler with left and right tailpipes exiting behind the rear tires. It's a 4.2 Any suggestions?.
Last edited by MJW f150; Sep 18, 2010 at 08:21 PM. Reason: added details
Fleet Mechanic
Joined: Jul 2010
Posts: 1,354
Likes: 31
From: Winnipeg
MJW f150,
Try looking from front to rear at the whole exhaust system mounting to make sure there is clearance from any metals or body parts. Sometimes heat shielding is pop-riveted or bolted to the floor over the exhaust and corrosion or loose fasteners will allow the shielding to drop onto or very close the exhaust. Some exhaust rubber mounts also have a steel guard covering them. I assume it's for heat reflection. I've seen some rust loose on some vehicles at work and they jam between the mount rubber and the piping or muffler causing a vibration.
Try looking from front to rear at the whole exhaust system mounting to make sure there is clearance from any metals or body parts. Sometimes heat shielding is pop-riveted or bolted to the floor over the exhaust and corrosion or loose fasteners will allow the shielding to drop onto or very close the exhaust. Some exhaust rubber mounts also have a steel guard covering them. I assume it's for heat reflection. I've seen some rust loose on some vehicles at work and they jam between the mount rubber and the piping or muffler causing a vibration.
New User
Joined: Sep 2010
Posts: 5
Likes: 0
The entire system wobbles since it is all rubber mounted but doesn't appear to make contact nywhere.. The vibration seems to be caused by a shaking of the engine. Makes me wonder if the engine mounts are bad and could be transmitting the vibration. It's almost like a resonance between the engine and the exhaust system.
Senior User
Joined: Mar 2005
Posts: 393
Likes: 0
From: Mi
Trending Topics
New User
Joined: Sep 2010
Posts: 5
Likes: 0
I took the trck to the dealer. They replaced the harmonic balancer to try to stop the engine from vibrating and shaking the whole exhaust system. That didn't work. So they put in new motor mounts @ n/c. No change. Now they are sending all the info michigan to get advice on how to fix this. They are leaning towards installing a couple of dampers on the exhaust system to offset the vibration harmonics. Does anyone know if this works? And I planned on replacing the muffler with a SISO flowmaster 3 chamber 70 series. Nice rumbly muffler with no popping. I wonder if the damper system would still work on a different /new muffler? I wonder of the inside of the cat's have come loose and that is the issue. Thats under warranty. Still need answers.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
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
Thread
Thread Starter
Forum
Replies
Last Post
