Maybe take your Alternator to a re-builder and have it checked? That's if there are still any around.
Maybe take your Alternator to a re-builder and have it checked? That's if there are still any around.
"The Constitution is not an instrument for the government to restrain the people, it is an instrument for the people to restrain the government."
-Patrick Henry
A5150nut
2006 K3500 D/A
94 6.5 4x4 5spd Sold
Check with this guy for repairing your instrument cluster:
https://drspeedometer.com/
Casey
1995 K1500 Tahoe 2 door, 6.5LTD, 4L80E, NP241, 3.42's, 285/75R16 BFG K02's; 1997 506 block; Kennedy OPS harness, gauges, Quick Heat plugs, and TD-Max chip; Dtech FSD on FSD Cooler; vacuum pump deleted, HX35 turbo, Turbo Master, 3.5" Kennedy exhaust, F code intake; dual t/stats, HO water pump, Champion radiator; Racor fuel filter
I had the IPC overhauled but the problem remains. Since the tranny is OK, the tach has been overhauled, this seems to leave the alternator. Is it possible to replace the sensor in the alternator that generates the signal for the tach, or do I need to put a new alternator in there?
Thanks
Alternators aren't that expensive. I'd replace it... But, before you do, I'd remove the original alternator's pulley, and replace the one on the new alternator. These pulleys are specific to the 6.5L diesel - for tach accuracy. The 6.5L diesel alternator pulley should measure 67mm peak to peak when measuring across the pulley's peaks and valleys.
The last alternator I replaced had a 59mm pulley... That produced about a 500-rpm error. What seems to happen is that the original bad alternator on a 6.5 would be traded in for an auto parts store replacement, not knowing the pulley was unique. Since more of these alternators (and smaller pulleys) were used for a gas engine application, that's what you'll likely get as a replacement.
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Thank you very much. I agree with all that you've said. I also concluded, based on a few Internet searches, that that little pulse generator gizmo in the alternator cannot be replaced separately, so I'll just R & R the whole unit. We'll pay particular attention to the pulley.
Will let you know.
If you can find a local re-builder for your original alternator you'll have a much better end product and the correct pulley.
"The Constitution is not an instrument for the government to restrain the people, it is an instrument for the people to restrain the government."
-Patrick Henry
A5150nut
2006 K3500 D/A
94 6.5 4x4 5spd Sold
Replaced alternator, I'm told problem is fixed. Have a new IPC and alternator now.
I very much appreciate the advice. This '99 Suburban w/6.5 TD has 66K on the clock, and I intend to keep it forever. You've helped me toward this goal.