250 Harmonic Balancer on a 200?

[LameHoof65]

I have a 250 balancer and I don't think it is a problem to use on my 200, I do think I will have to use the longer water pump. Will I need to do anything to my flywheel regarding overall balance? Also, I have been looking for a repair sleeve and I haven't found anyone here with one in stock, however I will try NAPA tomorrow. Is there a special adhesive or cement to put on the ID of one of those sleeves to make it stay on--or is it just a pressed fit?

 

[Hot 6t Falcon]

Sorry Darwin,

A 250 damper WON'T work on a 200. The snout on a 250 crankshaft is a larger diameter than the snout on a 200.

144/170/200 are all interchangeable.

Good Luck

 

[LameHoof65]

Well, I guess I will have to talk my wife into a new balancer from FSPP, huh? Oh darn!

 

[LameHoof65]

Dennis I went out and mic'd the two balancers and the one I took off of my 200 with the repair sleeve measured 1.793" on OD with a depth to crank bolt at 1.375" then I measured the balancer I thought I got off of a 250, it is a heavier balancer and a little larger around but it measured 1.749" OD with the same 1.375" depth from where the crank meets the big washer to the crank. I don't see why it won't work---but maybe it is a 200 balancer, however instead of the 3 pulley bolts it has 4---just like the 250 balancer.......what do you think?

 

[CZLN6]

Howdy Darwin:

FYI-

Damper:
A stock 170/200 crankshaft damper, a.k.a. harmonic balancer, came in a three-bolt (’63 – ‘77) and in 200s, a four-bolt (’78 – ‘83) version. The earlier three-bolt damper measures 5 7/8" diameter and aligns with a short shaft water pump. The later damper measures 6 1/8" across and aligns with the long shaft water pump.

The damper is grooved for the crankshaft to water pump v-belt pulley. Engines in vehicles with power steering had a damper with two grooves.

Make sure that the damper is in good shape before reusing it. Check the rubber sandwiched between the inner and outer metal for signs of deterioration, and check to make sure that the zero degrees top center mark is really on center.

The heavier two groove pulley seems to help smooth out any engine. When adapting the two-groove pulley to an earlier engine, make sure that it is the early three-bolt design. There is a heavier still three groove crank damper for the later four bolt and long water pump shaft engines. It may have some value in adding crankshaft stability and engine smoothness.

Adios, David

 

[LameHoof65]

Went out and took some more measurements and this is what I seem to have:

The old one that came off of the '68 block is about a 1/16th shy of 6" diameter.

The newer one is the 3 pulley 4 bolt and is about 6.250" in diameter, it was a little harder to measure with that smaller 3rd pulley on the front.

I slipped the newer one on the shaft and it is a nice tight fit....it is not the 3 bolt.

When looking at the keyway the groove the cut groove on the pulley is about 60* down and just opposite the groove 180* are the timing numbers.

Can I use the newer one? it is a 4 bolt and it sounds like those timing marks may be off somewhat----it definitely came off of a newer 200 block.

 

[LameHoof65]

On the above post I was looking at the balancer and took out my protractor and the timing groove in the pulley is actually 120* from the keyway at TDC as you face the engine---that puts the groove in the pulley exactly at the 6pm position. I know this is confusing but that is the best I can explain it with/o drawing it.

 

[Anonymous]

I got one from damper doctor that has 5k miles in it. Pm me if you want it. I may not respond for a day or 2 because of work.