DeTomaso Mailing List: March 2001, Message #89

First things first:

If you are running a multiple groove pulley and belt (newer style), you only use 1 belt.  2 belts are used in the old single groove "V Belt" systems (by the way, they should always be a matched set).  Test your belt tension by either a tension tester (around $20 at the local NAPA) or the old "twist" method, multiple groove belts run tighter than V belts (I believe).

Your charging problem is only related to the belt if it is slipping at idle (do you hear it squeal?).  If it is not slipping, test the charging system.  What size and type of alternator are you running, check the archives for discussion on alternators/rpms/charging, some don't start charging until a certain alternator rpm is reached.

The "big" 15/16 bolt does not hold on the pulleys!  there should be 3 or 4 (I've worked on too many different type to remember specifically) bolts (9/16 head) around the outside of the "big bolt" that holds the pulley to the dampener.

Kenny

(test the charging system first!)

>>> Michael Royer <mroyer@surferdude.com> 03/02/01 10:03AM >>>
I am working on getting a proper arrangement for my Pantera's 
alternator.  The way it is now, the ribbed AC belt moves the water pump, AC 
compressor and alternator.  When I installed the alternator, I had to 
change the pulley from V-belt to ribbed to match the extisting single belt 
system.  Presently at idle, I don't get enough amps.  On hot summer days 
idling with all the fans running, I get stranded unless I set the idle 
to  1400 rpm.

Photos of other cars on the internet shows two belts.  A closer look at my 
car revealed that the alternator was sitting too far forward.  I can move 
it back easily.   But here is the problem.  I need to put a second pulley 
on the crank balancer.  Taking the existing pulley off is just too 
tough.  I'm not even at the shopping for parts stage yet.  How do I turn 
the 15/16th nut in the center of the pulley?  When I put enough leverage on 
it, the engine turns.  I put it in gear, the car rolls, even against the 
parking brake.  I need advice.

Shopping for parts.  I can move the alternator easily (I think) and could 
find a pulley to add just behind the ribbed pulley.  Then I can make some 
guesses regarding how long the belt is and make a fit.  Sound right?

How do I remove the existing pulley?  Should I  be scared that the engine 
will start as I'm turning the crank?

Mike