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6.4L Power Stroke Diesel Engine fitted to 2008 - 2010 F250, F350 and F450 pickup trucks and F350 + Cab Chassis SPONSORED BY:

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  #1  
Old 09-07-2010, 05:38 PM
battleson battleson is offline
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high pitch squeal from under the hood.....turbo?

ok i have a question........the last 500 km i have been getting a high pitched squeal coming from the engine compartment it happens usually from around 20-30 psi boost and 2000-2200 rpms especially if the engine is not at full temp which usually runs at 188-194......it does make the noise at highway speeds but not as bad at lower speeds......it sorta sounds like a belt squeal or pully bearing squeal but it is not consistant.......the engine has 110,000 km on it.......anyone have any idea what this could be or has had similar problems?
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Old 09-07-2010, 07:55 PM
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check your idler pully for dry bearings.
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Old 09-07-2010, 10:27 PM
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On the 6.0's with a blown head gasket you could get a squeal as the combustion pressure entered the coolant system and exited through the coolant pressure cap; usually under moderate to high boost. I would not consider it high frequency but a lower tone squeal...... similiar to low speed bushing, etc.......

Haven't heard of 6.4's having this problem but if you have also been losing coolant; or a tuner in the equation.......

Bob
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Old 09-07-2010, 10:33 PM
battleson battleson is offline
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no i havnt lost any coolant or anything like that........i guess i am gonna have to check my bearing on pully's and start that way first then move onto other things
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Old 09-07-2010, 10:33 PM
fordsd350 fordsd350 is offline
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Not an expert, but I second the idler pulley.

Your description sounds about like what I had happening. Turned out to be the idler pulley. I believe there's a TSB out there for the 6.4L concerning this problem. Sorry, don't know the number.
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Old 09-07-2010, 11:32 PM
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Quote:
Originally Posted by fordsd350 View Post
Not an expert, but I second the idler pulley.

Your description sounds about like what I had happening. Turned out to be the idler pulley. I believe there's a TSB out there for the 6.4L concerning this problem. Sorry, don't know the number.
Not that it's cold outside yet (although it was in the 40's in Colorado Springs this morning on the way to the airport) but maybe this is the TSB?
http://www.ford-trucks.com/forums/81...ml#post7098031
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Old 09-08-2010, 06:00 AM
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Originally Posted by kper05 View Post
Not that it's cold outside yet (although it was in the 40's in Colorado Springs this morning on the way to the airport) but maybe this is the TSB?
http://www.ford-trucks.com/forums/81...ml#post7098031
That is the correct TSB.
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Old 09-08-2010, 06:00 AM
 
 
 
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