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Size wise, the collective wisdom on the Forum says 2 5/8" diameter to correctly power the tach.
^^This

My buddy needed a new alternator for his 6.5 and Advance Auto had the alternator with the correct pulley on it. His previous alternator had a gasser pulley on it. Take a tape measure with you and measure the pulley. Like said, the face of the pulley should measure 2-5/8".

FYI, if you read the CS144 alternator upgrade thread, it's basically as simple as changing the pulley and making one small bracket.
 
Discussion starter · #22 ·
just gonna stick with my brand new pos duralast - freddy im with ya on the warranty... their issue if its no good.

if it damages anything... ill MAKE it their issue.

otherwise correct pulley is on the way. ill be seeing it 2morrow or day after. sometime this week at least.

as stated ^^^... ill post results.
 
Discussion starter · #23 · (Edited)
^^This

My buddy needed a new alternator for his 6.5 and Advance Auto had the alternator with the correct pulley on it. His previous alternator had a gasser pulley on it. Take a tape measure with you and measure the pulley. Like said, the face of the pulley should measure 2-5/8".

FYI, if you read the CS144 alternator upgrade thread, it's basically as simple as changing the pulley and making one small bracket.

dont wanna do that at the moment. im not running any extra electrical. all OE as far as electronics are concerned. ill upgrade 2 a higher output when I have some off road lights, a warn and some other goodies ill need some extra amps for... till then its just overkill. ive got other issues 2 worry about like my blow by and cracked intake. time 2 find the F vin I guess...

I just need a new one for the time being (volt reg bad) she still charges, just not well. and mostly whats bugging me is the tach @ dash not reading correctly. since i redid and fixed all my grounds... no more electrical issues...just crappy volt regulator. my lights dont even do the pulse thing with motor anymore... since I replaced my charging cables and added fuse block.

thanks guys for the help as always.
 
Discussion starter · #24 ·
im gonna exchange this alt for a different one tho, I dont like how it seizes up on that particular spot. the "new" one from oreillys did the same... unless this is common?

i had spun a remanned unit... did better... no seizing ... should I get that one??
 
Discussion starter · #25 ·
ok, as far as advance auto, autozone and oreillys its a crap shoot for the correct pulley size. ive bought 4 new alts. ive returned 3. kept the one from napa seeing as how it came with the correct pulley.

for those who are looking for the CORRECt OE 100-105amp alternator replacement with the CORRECt pulley (the common 9mm offset type) .... napa part # 1N-4555D. 132 dollars and some change. brand new alternator. turns great, no seizing up while turning by hand.

that dbelectrical.com place in tn... they are crap and sent me the incorrect pulley even after i had sent them a diagram with precise measurements.

i did manage to find a place around town that had an original stamped pulley. apparently there are 2 different pulleys? one with a 9mm offset/spacer deal and one with a 14mm. i already have 2 of the 9mm offset (the stamped one i snagged here in town and the turned one that came on the napa alt) but I told the guy to order me the 14mm offset.

gonna try the 14mm offset as well - used a stright edge as another thread mentioned. it would seem that my alt pulley is 14mm too far back, and needs to move forward a bit and would be the answer to my fraying belt ...

so i guess im fixing three or 4 issues at once here.
-low ign voltage
-damaged volt regulator
-incorrect tach reading
-fraying belt and offset pulley by 14mm. go figure.


who would have known an alternator would have been such a pain in the arse!

ill take some piks of old alt, new alt... some pulleys side by side...
 
the CORRECt OE 100-105amp alternator replacement with the CORRECt pulley (the common 9mm offset type) .... napa part # 1N-4555D.
Napa Online shows my store @ $125 and save 10% off, through the 25th of Feb if you reserve online and pickup in your local store.
 
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