harmonic ballancer
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harmonic ballancer
alright....engine is running pretty good. we timed it by ear temporarily because i don't have a timing light...well today i drove the truck to my friends and we threw the timing light on. we could not find the line for anything...i then got down on the ground and realized that the mark is completely upside down. truck runs too good to be 180 degrees out of timing. whats up with this? is it even possible to put the harmonic ballancer on upside down? is there different h.b.'s for different years? it is a 300, 93 i think (it came with a carbed head so you never know). thanks.
chris
chris
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From: Saddle Brook United State
The balancer only goes on one way, however the balancer is made of two parts--the outer ring and the hub they are bonded together by a rubber ring between them. This bond can fail and the outer ring can move and change the timing mark position. The first thing I would do is check the wiring in the cap against a factory diagram showing where the number one cyl is located in the cap. If it is correct,set the No1 cyl on T.D.C. of the firing stroke and see where the rotor points if it points to number one in the cap, check the timing mark on the damper and see where it is in relationship to the timing plate bolted to the timing cover, low on the PASSENGERS SIDE of the engine. The timing mark is a THIN SCRIBED LINE like a pencil line not the large notch. If the mark is not near the plate and the cap is wired correctly the damper might be bad /slipped. OH and get a cheap timing light.
stractor
stractor
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From: Saddle Brook United State
That is a good question. I would take it off if you suspect it has moved. Possibly you can see some indication that it has slipped. Looks for original paint marks, scratches and the like to indicate it has moved, it may even be loose. I would check the other things first and leave the damper to last. You could even mark it across the two parts and run the truck for a few days and see if the marks move.
stractor
stractor
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so i take the hb off, spin it and wait for it to stop. where ever my finger hits is the new line? haha just kidding guys. how should i make my own line...just find a point that runs good and there we go? thanks.
chris
chris
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Post Fiend
Joined: Mar 2002
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From: Bonita Springs FL
A new HB should solve the problem and is the most accurate, but the redneck method is to crank the engine over by hand with a drinking straw or similar in the #1 spark plug hole. When you get to the top of the compression stroke, you are at 0 degrees, aka TDC. Mark the balancer and you're good to go.
Of course, if your balancer has slipped, then don't expect the mark to stay accurate for very long. It could slip the first time you start the engine to time it with your new mark.
Of course, if your balancer has slipped, then don't expect the mark to stay accurate for very long. It could slip the first time you start the engine to time it with your new mark.
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Joe Kucinski
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Joined: Jul 2003
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From: Nashville
My '83 had no timing mark either, so had to paint a line. That got covered in grease a few seconds later so I filed a notch in the pully instead. So now I just clean off the spot and rub the notch w/ chalk any time I need to check the timing... which thankfully isn't very often.
If the ring has slipped go ahead and replace the balancer, better to spend a few bucks now to make it right then wait and let things gradually shake apart. Dorman makes the only reasonably priced HB's for the 300 [# 594077 for V belts, # 594152 for serpentine]. They are $75- $80 at most parts stores [autozone/ oreilly].
If the ring has slipped go ahead and replace the balancer, better to spend a few bucks now to make it right then wait and let things gradually shake apart. Dorman makes the only reasonably priced HB's for the 300 [# 594077 for V belts, # 594152 for serpentine]. They are $75- $80 at most parts stores [autozone/ oreilly].
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