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Car Forum / Ford / Ford Explorer / March 2005Serpentine Belt -- Part Number?
Hello, just purchased a new serpentine belt for my 1998 Explorer EB, V8 from one of my local Ford dealers. Now that I'm home I noticed a slight difference in the Ford part numbers and wonder if I purchased the correct belt? The old belt on my truck has the part number F77E-8620-PA and the new belt part number is F77Z-8620-PB. My Ford Technical Service Publication CD indicates the part number 8620, but does not mention the F77E/Z or the PA/B. Before I go removing the old belt I want to be sure I have the correct replacement. Thank you, Steven You could always do what the pros do.... take the old belt off and compare it to the new belt...... always compare it to the old belt before beginning the (sometimes) arduous task of installing it.... never fail to compare the belts before beginning the arduous task of installing the new belt.... DId I mention that it is a good idea to compare the old belt to the new belt to be sure you have the right one? There's an old saying.... "Many's the slip twixt the cup and the lip....". Auto parts seem to be especially prone... Someone that doesn't care about numbers, compiles the parts descriptions.... someone that dosesn't care about car parts compiles the numbers and someone that doesn't care about parts or numbers produces the catalogue. If the partsman is good, he wont add to the problem and may even know if a catalogue error exists or not (horrors!!! others besides techs can screw up!!). If the partsman is not so good, all bets are off. Ford has used the base part number '8620' to describe a FEAD belt (formerly fan belt) for many years.... since we know the part is a FEAD belt, the point is moot. There may be a change in engineering part numbers (since all the belts I use are properly referred to by a motorcraft #.... JK(number of grooves)-(length of belt).... ) to denote a different part entirely, a change in composition, a change in technology incorporated into the production run, even a change in packaging can trigger a change inengineering numbers. You could receive a flood of anecdotal coincedences, tales, tales unrelated but significant and juhior in the basement jerking your chain as hard as he can and be no nearer the answer to your question..... Your best and most reliable solution is to bac away from the computer, reduce the seat/chair interface, boldly grasp the appropriate tool and prove it to yourself one way or the other. Feelin' kinda frisky tonight.... is there a full moon???? > Hello, just purchased a new serpentine belt for my 1998 Explorer EB, V8 > from one of my local Ford dealers. Now that I'm home I noticed a slight > difference in the Ford part numbers and wonder if I purchased the > correct belt? Even having verified the number, I found my "genuine Ford" belt was somehow bigger than the original one (well, it "must" have been looser because it squealed badly). I only arrived at that conclusion after also replacing the idler pulley and tensioner (since the tensioner is a well-known failure item anyway and both their bearings seemed in poor shape). So, after replacing the other items and still having a horrendous squeal (which naturally only became evident AFTER I tossed out the old belt), I went to the auto parts store and got one (cheaper, natch!) from them. Ever so slightly smaller, it was difficult to even convince myself it WAS smaller. But it was clearly the same thickness, width and grooving. However, it went on with more difficultly (having to displace the tensioner more. At last, there is no more squeal. Oh, and there IS a physical difference in the idler pulley - the new one is flat, not with the "shoulders". Different part number? Dunno. But I was at their counter insisting they gave me the wrong part. I conceded, kept it, and it seems to work fine. The tensioner was a recall item, if anyone out here didn't know that. At least it was on my '97. I had almost the same problem noisy start up, But the belt looked fine, no cracks or abrasions. But that damn noise!!!! Where was it coming from I listened to all the bearings and all sounded smooth running. I again looked at the belt, still it looked fine. But that noise is driving me crazy, so I bought a new belt from NAPA and the noise went away! My guess is the belt was stretched ever so slightly that it would cause the tensioner to rattle, even after it was replaced. Searcher1 > Even having verified the number, I found my "genuine Ford" belt was > somehow [quoted text clipped - 22 lines] > at their counter insisting they gave me the wrong part. I conceded, kept > it, and it seems to work fine. Ok, the new belt was the same size, length/width, as the old, and installed perfectly, once I found an extra short 15mm socket for my 1/2 inch breaker bar. Interesting you should mention 'noisy start up,' as this is the reason I replaced the belt! When I took the vehicle in for the "noisy start up" the service adviser said it was the belt that needed replacement, even though I thought it was something else since the noise is only present when cold and goes away once the vehicle warms up. The old belt has ~53,000 miles on it, looks fine, no cracks at all. Since the '98 Explorer still has the problem with the new belt installed, I guess I will make another appointment and see what they say now :o( Thanks to everyone who replied, Steven . Searcher 1 wrote: > The tensioner was a recall item, if anyone out here didn't know that. At > least it was on my '97. I had almost the same problem noisy start up, But [quoted text clipped - 33 lines] >>at their counter insisting they gave me the wrong part. I conceded, kept >>it, and it seems to work fine. "Still having that horrendous squeal...". Did we leave somthing out of our original post, perhaps?.... Ain't nobody paying me to help you save money, Herb... the least you could do is give me a little factoid or two....Especially when you come back with an almost "holier than thou" atttitude. Let's toss in a dig about not pitching old parts before we are sure they're the culprit. No wonder people think techs are dicks... if the customer doesn't give the whole story, the part that is given may mean nothing. I do this for "warm and fuzzies"... I feel good when I've helped someone cure an insurmountable problem or save a few bucks. I do this for free. If you can't be straight up with me, I can't be straight up with you................ Auto parts ae like tools and furniture.... there is a reason why some things are cheaper than others... obviously, you feel that you deserve cheap. > Even having verified the number, I found my "genuine Ford" belt was somehow > bigger than the original one (well, it "must" have been looser because it [quoted text clipped - 16 lines] > at their counter insisting they gave me the wrong part. I conceded, kept > it, and it seems to work fine. Huh? Having a bad day? What are you talking about? Sounds like you are accusing me of knocking you for some advice you might have dispensed along the way. Frankly I don't remember whether you chimed in or not when I was trying to find alternate explanations for why my belt was so noisy. It eventually turned out to be a belt that wasn't the right size. I'm just recounting the mess I made for myself by not keeping the old belt around a bit longer and/or checking it more closely. No need to get so snippy. > "Still having that horrendous squeal...". Did we leave somthing out of our > original post, perhaps?.... Ain't nobody paying me to help you save money, [quoted text clipped - 40 lines] > > at their counter insisting they gave me the wrong part. I conceded, kept > > it, and it seems to work fine. Whoops.... my bad... I had thought you were the original poster and had neglected to include some valuable information. My apologies... > Whoops.... my bad... I had thought you were the original > poster and had > neglected to include some valuable information. My > apologies... Quote:"The old belt on my truck has the part number F77E-8620-PA and the new belt part number is F77Z-8620-PB. My Ford Technical Service Publication CD indicates the part number 8620, but does not mention the F77E/Z or the PA/B. Before I go removing the old belt I want to be sure I have the correct replacement. " This is too late to probably help you but...here?s the deal. Ford has 3 part numbers assigned to belts. "8620" designates it as a belt. The F77E-PA, is considered an engineering number (what they put on the vehicle). The F77Z-PB number, is the Ford Service P/N that they sell in the parts department at dealers (you can always tell the service number because the 4th digit is a "Z"). The JK6-943AA/JK6-942AA are Ford Motorcraft P/N?s that are sold at many parts stores. Basically, they?re all the same size. I work in belt engineering for somebody that makes Ford belts. Hope this helps. > > Whoops.... my bad... I had thought you were the original > > poster and had [quoted text clipped - 17 lines] > I work in belt engineering for somebody that makes Ford belts. Hope > this helps. MoRambler, thanks for the information, timely or not. It's interesting to learn that the 'Z' in the Ford part number indicates it is a 'service' part (replacement??), and not likely a part installed during the vehicle build. BTW, the replacement belt fit perfectly. Thanks again, Steven > > > Whoops.... my bad... I had thought you were the > original [quoted text clipped - 42 lines] > > Steven No problem Steven, glad to help. "Typically", the Ford Service part is exactly the same as the Ford Engineering part as far as dimensions go. There "could" be a slight difference in materials however. Both of them would be considered quality parts however. Our company (Dayco) along with both Gates and Goodyear produce belts for Ford (and many others). The service lines we all produce are all made with top quality materials. Ford has changed back and forth the last several years between us and Goodyear to supply their service parts. The only difference in buying a traditional aftermarket belt is that all of us will usually round to the nearest 1/4 or 1/2" dimension when applying a replacement belt. Due to the metric dimensions used today, this makes it a little tougher, because of in-between sizes. Even so, the belts are quite functional. > There's an old saying.... "Many's the slip twixt the cup and the lip....". > Auto parts seem to be especially prone... Someone that doesn't care about [quoted text clipped - 4 lines] > (horrors!!! others besides techs can screw up!!). If the partsman is not so > good, all bets are off. I learned about that one the hard way -- bought a replacement radiator hose for a Mazda 626. it didn't fit. Went somewhere else and bought one; it was a different brand, but the same as the first. Took it back, along with the hose I was trying to replace. It took the guy about 30 minutes of comparing the part I brought in to every hose they had to find me the right hose. Whoever compiled the 3rd party book was obviously WAY wrong on that hose for that car, and the aftermarket companies had all followed the same wrong info. -Kevin Jim, my receipt indicated: JK6*943*AA - V-BELT JK6*942*AA - REPLACING PART-NO. FOR ABOVE PART My dealer must use a smiler number to what your use too. The F77 number I used in my original post was taken from the belt/package part itself. The new belt was the same size, length/width/ribs, as the old one from what I could tell. Thank you, Steven > Ford has used the base part number '8620' to describe a FEAD belt (formerly > fan belt) for many years.... since we know the part is a FEAD belt, the [quoted text clipped - 9 lines] >>difference in the Ford part numbers and wonder if I purchased the >>correct belt? |
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