divemaster5734
Full Access Member
The '90 NA 7.3 E350 I'm working on was missing the alternator belt when I got it.
I got a ribbed one for that, and the AC belt that was seriously worn.
I know I had decent tension on all the belts and they were all seated correctly.
The alt, PS, and AC belts all go over both crank and cam pulleys, and air is driven by alt.
Started it up, everything appeared to be running smooth, good current, (22 amps immediately after start up), and the brake assist operating.
Drove it about 1 1/2 miles, ( that's around the block here, a couple short steep grades and tight twisty turns), got home and then this.
The alt belt was flipped over and the vac belt riding wild.
All belts still have good tension.
( ignore the cable coming from the oil dipstick tube, I haven't gotten around to calibrating the replacement one yet)
Then down at the pulleys
The alt belt was impossibly twisted around, and if you look closely there something snaking around on the left bottom, that's what's left of the AC belt that snapped.
The air belt was there before, and is ribbed.
The PS belt was the only one still in place, is a non-ribbed belt.
I did replace the alternator with one from the 7.3 donor for the C350 project, but it was an exact replacement, and the charging system was working.
I used the same tension procedure on the e350 that I did on the C350, and the belts on that work perfectly.
Any insight would be appreciated.
Thanks
I got a ribbed one for that, and the AC belt that was seriously worn.
I know I had decent tension on all the belts and they were all seated correctly.
The alt, PS, and AC belts all go over both crank and cam pulleys, and air is driven by alt.
Started it up, everything appeared to be running smooth, good current, (22 amps immediately after start up), and the brake assist operating.
Drove it about 1 1/2 miles, ( that's around the block here, a couple short steep grades and tight twisty turns), got home and then this.
You must be registered for see images attach
The alt belt was flipped over and the vac belt riding wild.
All belts still have good tension.
( ignore the cable coming from the oil dipstick tube, I haven't gotten around to calibrating the replacement one yet)
Then down at the pulleys
You must be registered for see images attach
The alt belt was impossibly twisted around, and if you look closely there something snaking around on the left bottom, that's what's left of the AC belt that snapped.
The air belt was there before, and is ribbed.
The PS belt was the only one still in place, is a non-ribbed belt.
I did replace the alternator with one from the 7.3 donor for the C350 project, but it was an exact replacement, and the charging system was working.
I used the same tension procedure on the e350 that I did on the C350, and the belts on that work perfectly.
Any insight would be appreciated.
Thanks