Harmonic Balancer questions : new one i different, BTDC is differrent ,pics in side
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From: pgh,pa,
Harmonic Balancer questions : new one i different, BTDC is differrent ,pics in side
Ok i bought a new Harmonic balancer, and I am having a few problems:
1. They are different sizes, the diameters are both 6 3/4in. but the thickness of the outer ring is different, fig 1.
New:1 5/8in. Old: 1 3/16
2. BTDC marking in relation to the key way on the crankshaft is different, fig 1. according to the timing marks on the new one, the marks are 30 degrees apart, fig 1.
ok heres my questions,
1. Is it possible for the outer ring to have moved on the old one?
(the elastomer ring is sticking out bout 1/8 inch)
2.before i took the motor out, it ran good, and i had replaced the distributor 2months ago,and the timing and everything was ok, i set it using the marks on the old balancer
misc. info :
they are the same length on the hub that slips over the crank snout, fig 2. The thickness of the outside ring doesnt really bother me as much, because the old one is a solid outer ring, and the new one is a hollowback one, fig 3. also both dampers weigh the same.
Before i took the motor out, it ran good, and i had replaced the distributor 2months ago,and the timing and everything was ok, i set it using the marks on the old balancer
I am rebuilding the motor, it has 140k miles on it,
1. They are different sizes, the diameters are both 6 3/4in. but the thickness of the outer ring is different, fig 1.
New:1 5/8in. Old: 1 3/16
2. BTDC marking in relation to the key way on the crankshaft is different, fig 1. according to the timing marks on the new one, the marks are 30 degrees apart, fig 1.
ok heres my questions,
1. Is it possible for the outer ring to have moved on the old one?
(the elastomer ring is sticking out bout 1/8 inch)
2.before i took the motor out, it ran good, and i had replaced the distributor 2months ago,and the timing and everything was ok, i set it using the marks on the old balancer
misc. info :
they are the same length on the hub that slips over the crank snout, fig 2. The thickness of the outside ring doesnt really bother me as much, because the old one is a solid outer ring, and the new one is a hollowback one, fig 3. also both dampers weigh the same.
Before i took the motor out, it ran good, and i had replaced the distributor 2months ago,and the timing and everything was ok, i set it using the marks on the old balancer
I am rebuilding the motor, it has 140k miles on it,
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Joined: Jul 1999
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From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
The one on the bottom in pic #1 is in about the right place for a timing tab that bolts to the timing cover bolts, which puts the mark in the balancer at about 1:30 when #1 is at TDC; the one on top is setup for the stock timing tab locaion in most of these cars (if not all) which is welded to the timing cover near the center, which puts the mark at about 12:00 when #1 is at TDC.
Other than that, they are the same as far as I can see.
Conveniently, the keyway exactly lines up with the throw of the crank for #1 & #2 rods. So, if you point the balancer such that the keyway is exactly at 1:30, 45° from straight up, the mark should line up with the timing tab on your engine. Do that rough check of both balancers and see which one lines up with your tab. Those 2 are so far different that it should be immediately obvious which one is wrong.
Other than that, they are the same as far as I can see.
Conveniently, the keyway exactly lines up with the throw of the crank for #1 & #2 rods. So, if you point the balancer such that the keyway is exactly at 1:30, 45° from straight up, the mark should line up with the timing tab on your engine. Do that rough check of both balancers and see which one lines up with your tab. Those 2 are so far different that it should be immediately obvious which one is wrong.
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