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454 water pump pulley alignment |
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tbeard 
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Joined: April-26-2012 Location: Fort Worth TX Status: Offline Points: 387 |
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 Topic: 454 water pump pulley alignmentPosted: January-22-2013 at 2:08am |
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Assembly of the pulleys tonight on my BFN and I notice the RWP pulley is not aligned with the crank pulley. Aprox. 1/4 inch miss aligned. (The RWP needs to move toward the front of the boat)The bracket is bolted up to the block with no spacers. I have a bushing that I cannot remember where it was installed and wonder if it was used for a spacer? Bushing size is 1 inch OD X 1/2 inch ID X 3/8 inch length. See pic below.
 
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Thanks.......Tom
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BuffaloBFN
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Joined: June-24-2007 Location: Gainesville,GA Status: Offline Points: 6094 |
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Posted: January-22-2013 at 6:18am |
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I have a spacer behind where the lower alternaror bracket bolts to the block. It doesn't look like that though.
The trick is a moroso spacer kit. It's a hole pattern matched spacer that goes inside the pulley(they come in thicknesses). That'll fix you up. |
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tbeard
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Joined: April-26-2012 Location: Fort Worth TX Status: Offline Points: 387 |
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Posted: January-23-2013 at 1:04am |
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Thanks Greg,
Yes 1/4 inch spacer behind the lower bolt lined it right up. |
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Thanks.......Tom
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: January-23-2013 at 8:32am |
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Tom,
Don't forget about sheave parallelism. You may need spacers at all the mounts. A straight edge will tell. If not parallel, you'll be chewing up belts. |
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BuffaloBFN
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Joined: June-24-2007 Location: Gainesville,GA Status: Offline Points: 6094 |
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Posted: January-23-2013 at 11:07am |
The lower bolt on the RWP bracket? Mine doesn't have one of those; of course it didn't have the moroso spacer from the factory either. Check what Pete said to make sure it isn't out of whack(technical term). Belts can make a mess and send dust right into the carb. Does anyone recognize that bushing? |
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tbeard
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Joined: April-26-2012 Location: Fort Worth TX Status: Offline Points: 387 |
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Posted: January-23-2013 at 4:09pm |
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I did have some belt dust on the alternator side prior to teardown. And my alternator had a factory installed spacer behind one of the brackets. (that one I noted and replaced)
The RWP pulley had a spacer behing it. Very thin one though. Approx .030 |
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Thanks.......Tom
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tbeard
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Joined: April-26-2012 Location: Fort Worth TX Status: Offline Points: 387 |
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Posted: January-23-2013 at 4:14pm |
Pete, What steps do I go through to check for parallelism? 1.Straight edge on the face of the pulley and take measurements to a ref. point? 2. Rotate 90 degrees and repete step 1? Or...... are the measurements to the other pulleys? |
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Thanks.......Tom
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: January-24-2013 at 8:59am |
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Tom,
Since your sheave has an offset belt grove to it's face, you'll need to use a straight edge and a tape measure. Place the straight edge on the driven face and measure to the grove and then measure to the grove on the drive sheave. Measuring to both sides will tell you the alignment and the parallelism. Turning the sheave 90 degrees will only tell you if a sheave is bent. |
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tbeard
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Joined: April-26-2012 Location: Fort Worth TX Status: Offline Points: 387 |
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Posted: January-25-2013 at 3:23pm |
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Thanks Pete,
I never thought of checking and adjusting for alignment and parallelism but it is pretty straight forward. Awsome |
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Thanks.......Tom
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tbeard
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Posted: January-30-2013 at 1:06am |
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I am embarrassed to report back that I had my RWP pulley and engine water pulley reversed. That is why the RWP pulley was offset .250 inch. Looking through my pictures I caught the mistake and was thrilled to know I would not have to do some shimming. I did follow through with Pete's suggestion on the straight edge inspection for alignment and parallelism and everything lined up nicely. Thanks
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Thanks.......Tom
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Alden8100
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Joined: February-06-2013 Location: Canada Status: Offline Points: 6 |
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Posted: February-08-2013 at 2:33pm |
I'm totally agree with your ideas.You'r 100% good here that place the straight edge on the driven face and measure to the grove and then measure to the grove on the drive sheave. I agreed what's said above!!! |
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tbeard wrote: