Engine squeal
Thread Starter
|
Mountain Pass
Joined: Jan 2022
Posts: 154
Likes: 11
Engine squeal
Hello, I’ve been working on a 2004 f-250 6.0. I had just replaced the hpop and started it up, it ran for a couple minutes then started to make a whining noise almost like a belt. I removed the belt and it kept squealing. So I thought it was a bad turbo, I replaced it and it didn’t squeal as bad but still did. I’m thinking it’s a exhaust leak but would like some help knowing where it might be and how to fix it. Thank you
More Turbo
Joined: Dec 2012
Posts: 538
Likes: 151
From: Warsaw KY
Difficult to say from your video. Mechanics stethoscope, wooden dowel, might do the trick to narrow it down. Once you find the noise then the fixing part. If you did the turbo it is a good chance the pipes are not seated all the way. Careful poking around with a listening device in a running motor.
Thread Starter
|
Mountain Pass
Joined: Jan 2022
Posts: 154
Likes: 11
I’ve looked and there’s no black suit around the up pipes on the firewall or anything. I’ve heard a exhaust leak before and it just doesn’t sound the same. It doesn’t change at different rpms but it will change in tone just sitting at the same idle. Could it be a vacuum leak? Or a boost leak?
Laughing Gas
Joined: Aug 2010
Posts: 1,049
Likes: 230
From: Amarillo, TX
Sure sounds more like a boost leak than exhaust. I've had a leak at the collector & it was unmistakable - sounded just like a blow gun on a compressor.
Trending Topics
Thread Starter
|
Mountain Pass
Joined: Jan 2022
Posts: 154
Likes: 11
Where should I check for boost leaks at? I’ve looked over the cac tubes (or boots) and didn’t see anything big but I didn’t carefully look at them.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
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
More Turbo
Joined: Dec 2012
Posts: 538
Likes: 151
From: Warsaw KY
Unless you can get a look at the boots all the way around you can miss something. I recently had a small slice in a hot side boot. I couldn't see it(maybe with a mirror I might have) or feel it. Taking the boot off you can get a close look. If they have a lot of miles on them they may need replaced anyway. Are they weeping any oil? If they are good, clean the oil off of all mating surfaces and tighten them back down to 108 inch/pounds. If you don't have a torque wrench, in a pinch you can carefully measure how much stud you have showing on the clamp before you loosen anything.
Thread Starter
|
Mountain Pass
Joined: Jan 2022
Posts: 154
Likes: 11
@BryanStein i wasn’t sure if there was or not, and the noise happens all the time no matter at idle or driving. But when I drive it, it’s like there’s no power and no boost at all almost like when the cac boots pop off. Just no boost or something that’s what made me think it was a exhaust leak.
Thread Starter
|
Mountain Pass
Joined: Jan 2022
Posts: 154
Likes: 11
@Brotherbillstruck I took the boots off and looked at them very close and there doesn’t seem to be any cracks or anything wrong with them. Is there any way I can hook up compressed air in the system and see about any leaks anywhere? I’ve heard people say about smoke tests but haven’t found a machine that will do that yet. Any ideas would help, thank you
Fleet Mechanic
Joined: Jul 2013
Posts: 1,402
Likes: 114
From: Tuscaloosa, AL
@Brotherbillstruck I took the boots off and looked at them very close and there doesn’t seem to be any cracks or anything wrong with them. Is there any way I can hook up compressed air in the system and see about any leaks anywhere? I’ve heard people say about smoke tests but haven’t found a machine that will do that yet. Any ideas would help, thank you
More Turbo
Joined: Dec 2012
Posts: 538
Likes: 151
From: Warsaw KY
@Brotherbillstruck I took the boots off and looked at them very close and there doesn’t seem to be any cracks or anything wrong with them. Is there any way I can hook up compressed air in the system and see about any leaks anywhere? I’ve heard people say about smoke tests but haven’t found a machine that will do that yet. Any ideas would help, thank you
