Rummbelling Noise in engine compartment XLT 96

[Matie]

Hi There,

I listion rummbeling sound like liaking or crack exhaust initially i thought, hbut exhaust system were all good & noise was comming near around the alternator, & it can be hear when truck is parked & garebox engage, eather in fron or reverse gear, engine RPM is around 700 / 800, sound is clear if park in netural or parking, no sound while running, its perfect in truck running high or low speed,
any suggestion or advisse? I planed for long trip nearly 5-6000 km in my 2 weeks holidays, commencing 1 june,


Thanks & regards
Matie

 

[JohnJ]

I may not be understanding you correctly, but if this is a rumbling noise underhood while the engine is running and if this noise seems to be coming from up front near the belt:

Try removing the belt to see if the noise goes away. If it does, then turn each belt-driven pulley to feel for any lack of smoothness (rumbliness) to the spin or wobble. If you feel anything there, that's probably the part that's gone bad.

If you felt nothing, try putting the bely back on and let the engine run. Place a stick or similar object against each likely suspect particularly the alternator, tensioner pulley, and idler pulley. Be very careful not to let your stick touch any moving parts as this can cause you to become injured. In the case of a pulley, put your stick against the bolt in the center which does not move. Listen for your noise to be transmitted through the stick.

If however the noise is still present with the belt off, recheck your exhaust. If the noise happens only in gear you may need to set the parking brake and have someone sit in the truck with it in gear while you listen for the noise. Sometimes you can listen through a piece of rubber hose with one end near your ear to help localize the noise.

 

[Matie]

noise in engine compartment,

Thanks John,
You understod well, (sorry for lot of misspelled i have notice)
I will cary out those test you suggested, I gus it would help !! & will let you know the out come,

thanks again

Regards

Matie

I may not be understanding you correctly, but if this is a rumbling noise underhood while the engine is running and if this noise seems to be coming from up front near the belt:

Try removing the belt to see if the noise goes away. If it does, then turn each belt-driven pulley to feel for any lack of smoothness (rumbliness) to the spin or wobble. If you feel anything there, that's probably the part that's gone bad.

If you felt nothing, try putting the bely back on and let the engine run. Place a stick or similar object against each likely suspect particularly the alternator, tensioner pulley, and idler pulley. Be very careful not to let your stick touch any moving parts as this can cause you to become injured. In the case of a pulley, put your stick against the bolt in the center which does not move. Listen for your noise to be transmitted through the stick.

If however the noise is still present with the belt off, recheck your exhaust. If the noise happens only in gear you may need to set the parking brake and have someone sit in the truck with it in gear while you listen for the noise. Sometimes you can listen through a piece of rubber hose with one end near your ear to help localize the noise.

 

[96eb96]

Check the idler pulley, they go bad on these trucks. It is the lone pulley on top attached to the bracket. I would replace it no matter what, if it breaks you are stranded. They make a funny noise before they go.

 

[Matie]

Helo there,
Bud, I took of the drive belt & start the engine, engine sound was perfecr, (but just boiled up the water so quick) and checked all the pullies one by one, found belt tenssioner puly has funny bearing noise, changed & Its OK.

Thanks for every one to help, I do appreciate.

Regards

MAteen

 

[96eb96]

Helo there,
Bud, I took of the drive belt & start the engine, engine sound was perfecr, (but just boiled up the water so quick) and checked all the pullies one by one, found belt tenssioner puly has funny bearing noise, changed & Its OK.

Thanks for every one to help, I do appreciate.

Regards

MAteen

For prevention I would change the top idler one too. Mine went bad soon after the tensioner and I have a 96. I saw many others with this problem. It is like $10 and worth to do, if it breaks you overheat and get stranded.