A few 4000q/Quantum Syncro Q's

[FJ40Jim at aol.com]

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In a message dated 11/1/2002, CTDiesel writes:
> 1.  I had the timing belt replaced by a mechanic (lazy me, I already had the
> engine open for new lifters I put in) and he asked if i wanted the
> tensioner
> roller replaced also.  I said yes since I didnt know when it was last done.
> I know the water pump is the belt tensioner right?  And new water pumps
> from
> thepartsbin.com come with the toothed roller so isnt that tensioner roller?
> He didn't replace the water pump so I have not a clue what tensioner he
> replaced since i cannot locate it at any part of the belt. Unless he pulled
> off the toothed part and put a roller in that.  That leads me to the
> current
> question.  I have a rattle that sounds like pebbles in a tin can at all
> RPMs.
> I listened with a screwdriver and believe its the water pump.  Everyone
> agree?  FYI 145,000 miles on car.  So would it not have made sense for the
> mechanic to replace the water pump instead of just the tensioner roller?

There is an idler roller on one side of the belt, and the WP is the
adjustable tensioner on the other side of the belt.  It makes sense to change
the T-belt, crank & cam seals, WP, idler roller and antifreeze all at the
same time.

> 2.  How difficult is it to open up the rear differential for replacing
> bearings?  There is a growl when pulling and decelerating.  Has anyone run
> into snags?  I dont think its too bad.  I have leaking seals and go through
> gear lube every 500 miles.

I haven't done it yet, but it looks somewhat difficult to me, based on the
Bentley.  I rebuild Toyota & Ford diffs frequently, but they are very simple
cast iron units by comparison.

> 3. Does anyone know where to get a wiper assembly.  My left side wiper
> spline
> has stripped out completly. I was thinking of just JB Welding the wiper on
> the spline.

You might get a little more use out of it by cleaning the shredded aluminum
out of the pivot shaft splines.  Use an Xacto or sharp O-ring pick to get the
soft metal out of each little spline.  Once it is good & clean, reinstall the
wiper arm & torque down good on the nut.  This will cut new splines in the
aluminum arm.  If it was really worn, you may need to add a washer under the
nut to push the arm down onto the splines farther.
Otherwise, you could get one off any Quantum at the junkyard.  Maybe a T43
would also fit, I think they look very similar in the wiper & windshield
area.

Cheers,
Jim Chenoweth
85 4KSQ  w/ new heating & cooling systems,  headlight relays & hi-output
bulbs  (it was a busy week)
Lancaster, Ohio, USA