H cam bearings

stoff · Mar 18, 2009

rebuilding the motor on my h, took the block to a machine shop.. had it cleaned up and new cam bearings put in. I got the block back and started re assembling. started to put the cam in but it wont go in all the way.I called the machine shop they said they forgot to tell me that on those motors the cam bearings sometimes need to be reamed.. how would i go about doing this???

Owen Aaland · Mar 18, 2009

Poor man's way of fitting the cam bearings: Install the camshaft as far as it will go. Take it back out and inspect for shiny spots on the bearings. This is where the camshaft is touching. Use a pocket knife to scrape a little of the bearing material on those spots. Repeat as necessary until the camshaft is fully inserted and turns easily by hand.

When you get close, where the camshaft will go in but not turn easily, you can tap on the shaft toward the shiny area to deform the bearing enough to free it up. It usually doesn't take too much to get them to fit.

El Toro · Mar 19, 2009

Take it back to the machine shop and have them reamed the new cam bearings. Take the new cam along too. Hal

stoff · Mar 19, 2009

Thanks for your help

Anonymous-0 · Mar 19, 2009

Some engines definetly need cam bearings line bored upon installation, however the H normally should not. If the installation tool fits properly it is slightly larger than the cam shaft journal so when bushing is in place cam will have clearance. I installed a set in my own H two years ago, used a universal Snap on installation tool and had a heck of a time getting that cam freed up. When I did get it to turn decent I ran it with an electric drill to make sure, don't want to spin a cam bushing.

H cam bearings

stoff

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Owen Aaland

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El Toro

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stoff

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Anonymous-0

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