1990 ford f150 xlt lariat serpentine belt

Asked by Dec 28, 2015 at 06:25 PM about the 1990 Ford F-150 XLT Lariat LB

Question type: Maintenance & Repair

OK. You guys convinced me to stay original
with the belt although I don't agree with
some of what you say but we could argue
certain points all day. So you're the experts
answer me this. I replaced my water pump
and when I got back to putting the belt back
on it was very loose. Its a new belt and I
routed it according to the diagram. Why is it
so loose? Any answer you can give would be
appreciated. I've always done my own
repairs but this has got me stumped.
Thanks. Chris

4 Answers

61,345

The last 4 numbers of the belt's part number is the length. The first two, which aren't of concern here, just for future reference is the number of ribs the belt has across it's width. A belt that has part number 060808, for example, is a 6 rib width and 80.8 centimeters long. Make sure that the new belt and the old belt have the same last 4 digits on the part number. If you can't still read the part number of the old belt, measure it. Most auto parts stores have a belt measurer to size up the old belt. HTH. - Jim

1 out of 1 people think this is helpful.
148,975

Is the belt tensioner good? If the spring goes bad, or weakens, the belt will not be tight. Does it look like this? What engine.. the 5.0L?

1 out of 1 people think this is helpful.
223,755

I had to go a belt smaller when I replaced my Serpentine belt on my Mustang 5.0 as the tensioner was out of range. Just go back to the parts store and swap it.

2 out of 2 people think this is helpful.
16,680

Replaced a belt in an explorer (stock) and took the part number right out of the catalog. It was to short. Had to return to the store with the old belt, have it measured, and get one longer. The one that worked, according to the catalog, was the wrong belt. Could be a lot of reasons. Misprints in the parts catalog, even various size pullies being installed during manufacture.

2 out of 2 people think this is helpful.

Your Answer

Add photo

Related Questions

F-150

Looking for a Used F-150 in your area?

CarGurus has 211,555 nationwide F-150 listings starting at $1,000.

ZIP:

Search Ford F-150 Questions

Ford F-150 Experts

#1 OJ
OJ
Reputation 6,980
#2 dandyoun
dandyoun
Reputation 4,180
#3 tennisshoes
tennisshoes
Reputation 2,520
View All

Related Models For Sale

Used GMC Sierra 1500
935 Great Deals out of 62,272 listings starting at $1,395
Used Ford Mustang
361 Great Deals out of 44,495 listings starting at $1,000
Used Ford F-250
514 listings starting at $3,500
Used Ford Explorer
937 Great Deals out of 74,004 listings starting at $750
Used Ford Ranger
204 Great Deals out of 6,719 listings starting at $1,450
Used Jeep Wrangler
392 Great Deals out of 19,082 listings starting at $3,000

Used Cars For Sale

2017 Ford F-150 For Sale
4 Great Deals out of 102,948 listings starting at $18,199
2016 Ford F-150 For Sale
156 Great Deals out of 41,638 listings starting at $16,995
2015 Ford F-150 For Sale
199 Great Deals out of 7,251 listings starting at $17,480
2014 Ford F-150 For Sale
430 Great Deals out of 11,729 listings starting at $10,700