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?
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?
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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