4.6L (1996-2004 Modular) MustangTechnical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within. Sponsored by Cruizin Concepts
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Hi, I've had this annoying squeaking from my engine lately when I start it up. It lasts until the engine is passed 180*. I've changed belts and a few pulleys but it's still squeaking. When I spray that belt dressing on it, it made it 10x worse and now you can hear it from far away! Any ideas on how to narrow this down? I took the belt off and moved all the pulleys but none of them squeak moving by hand.
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99 gt vert, auto, 50 lbs. inj., 2800 stall, transgo stage III shift kit, 3.55 gear, Trick Flow Twisted Wedge Heads, Comp Cams blower cams, forged internals with 18.1 cc dished pistons (8:1 CR), 75 mm TB, CAI, MSD Ig. coils, coated long tube headers w/offroad pipes, eibach pro damper, SCT Livewire tuner, Saleen Series IV SC w/ 2.8" pulley, Chicane intercooler, LFP Heat Exchanger, and Nitto 555 drag radials. 398 rwhp / 342 rwtq.
Only thing you could really do is get another one and put it on
only thing I could think of that you might could try is while it's running, take and put a little more tension on the belt by hand on the tensioner and see if it goes away, or slightly loosen the belt. Just need to be very careful
1999 Ford Mustang GT Convertible Auto
Mods: Flowmaster Super 40s welded in
No, no and no. Do not even attempt to add tension by hand to a running engine. First off, consider the amount of pressure a tensioner is applying even when weak. The 5-10 lbs you will add to it with a lack of leverage will tell you nothing. Let alone the blatant risk of losing fingers!
I would say that this kind of noise is most commonly the belt it's self.
Then next would be the tensioner.
Then would be the alternator front bearing.
Owned 32 Mustangs & Counting.
Fondest memories: 1969 428CJ, it was stolen 60 days after complete rebuild.....
Worst memory: 1965 Notch back, rolled end over end, 2 days after rebuild, fractured Strut-bar..... Lesson learned: ALWAYS upgrade the front suspension of an early Mustang!
Worst mustang: 1974 4-cyl auto (it was cheap, I was broke...).
Favorite body style 1965/66 Fastback.
Present stable: 1997 SVT Cobra, 50k miles, Paciffic Green w/ tan leather & lots of goodies.
Im not sure how true this is, but i picked up a new dayco belt and a dayco rep told me their belts are made of a kevlar compound now and if for anyreason they get antifreeze or oil on them there gonna squeek forever afterwards.
Street Car, 4v D1sc, 20psi,viper spec t56, Team Z/ UPR suspension. SKELETON CREW RACING
If it helps, my F150 had a very similar problem. First I tried the dressing, didnt do a thing. Then I tried a new belt, worked for maybe a day and started squealing again. Replaced the tensioner and it stopped. Thats what I'd try.
-1965 Coupe- Mustang II Suspension, Coil Overs, Disc brakes, Down for V8/T-5 Conversion
-2000 GT- Sold
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