Anyone ever had the spring on that tensioner wear out? I had a bad alt bearing, and a bad idler pulley, but it still gives a little squeal up over 4k. Is that the spring not holding the idler down with appropriate pressure?
Signs your Serpentine belt tensioner is wearing out?
Anyone ever had the spring on that tensioner wear out? I had a bad alt bearing, and a bad idler pulley, but it still gives a little squeal up over 4k. Is that the spring not holding the idler down with appropriate pressure?
1984.5 G.T.350 5.0 CFI AOD Convertible (TRX package, loaded)
K&N filter in a stock dual snorkel, GT40 heads, Edelbrock 3721 intake, MSD 8456 Dist., MSD 8227 coil
Comp cams XE254H, hypereutectic pistons
Hooker Super Comp Shorty Equal Length Headers, catted BBK H-pipe, full custom duals
Maximum Motorsports caster/camber plates and strut tower brace, 3.73 rear, dura grip (both Yukon)
Ford Performance Springs, Firehawk A/S 225/55r16 on LMR TRX r390 wheels (street)
Federal 595 rs-rr 245/40r17 and 255/40r17 on OE cobra r wheels (race)
AOD rebuilt with a 6 clutch direct drum, Koline steels stacked with 8 clutches, Kevlar band, superior shift kit, new torque converter. --Everything else stock and fully functional.
Some have the little range indicator lines, but I think that mainly detects belt stretch.
With a belt mounted see how much deflection is there. Too much could indicate a weak tensioner spring.
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83 5.0 GT. Quicker than it looks! 10:1 (or just over) 306, Motorsport a332 cam, 140A alt, t5 conv, 8.8 w/ 3.27's, Edel rpm, alum rad, very worked e7's, Holley SA carb, etc... SOLD IT!!!!
Now an 1981 Granada! .040 over 302, Edel E-street heads... Currently building a 347 because, why not?
"Never underestimate the power of stupid people in large groups"
Normally they start bouncing with the enginr running, or if it sits a while it tends to stick in position...
Last edited by gt4494; 07-28-2020 at 08:04 AM.
"If you can't explain it simply, you don't understand it well enough."
Albert Einstein
1984 20th Anniversary GT350
Almost "Stock"
It is a wear item just like most under hood parts. Not unusual for something like this due to age and mileage. They are pretty sturdy and last a long time, but they will wear out over time. Generally aren't too expensive to replace even when needed.
Trey
"I Don't build it hoping for your approval! I built it because it meets mine!"
"I've spent most of my money on Mustangs, racing, and women... the rest I just wasted."
Mustangs Past: Too many to remember!
Current Mustangs:
1969 Mach 1
1979 Pace Car now 5.0/5 speed
1982 GT Stalled RestoModification
1984 SVO Still Waiting Restoration
1986 GT Under going Wide Body Conversion Currently
Current Capris:
1981 Capri Roller
1981 Capri Black Magic Roller Basket Case
1982 Capri RS 5.0/4spd T-top Full Restoration Stalled in TX
1984 Capri RS T-top Roller
1983-84 Gloy Racing Trans Am/IMSA Body Parts
I will need a replacement belt tensioner for my 79 5.0 but have never seen them for sale. Where are they available?
Rockauto for one.Originally Posted by Webstang
Dave
1FABP28M4FF114537 bought 12/84 sold 1992
1MEBP79M8FF613099 bought 9/13 sold 10/19
1FABP28M4FF166315 bought 3/12 sold 5/21
1FABP28T7FF239068 bought 10/14
1FABP28T9GF181465 bought 10/14
I used to buy them at the parts stores. Seems like I had several go out during my 3 decades of driving these old Fords.
79 Pace Car - 331, t5
79 Pace Car- 302, 4 spd
79 Cobra - working on 351w, t5
82 Capri- working on 302, t5
82gt - working on 408w, c4
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