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I had a similar problem when I rebuilt my 292 engine last summer. I installed an Isky 301333 cam in my engine with a Rollmaster timing set. The 301333 cam has a little more lift and duration than the 301444. After installing the cam I found I didn't have enough cam end play. It's .suppose to be .005", so it's not much. When I tightened everything up the engine would turn with a wrench, but it was obviously not right. The problem turned out to be the thrust washer. It seems like there were a couple of different thickness Y-Block thrust washers. I ended up taking the washers out of a good engine I had in my shop. I installed the cam without the timing chain and checked the cam end play with a dial indicator and it was perfect. It took me a week to figure all this out. The engine has been running for a year now and all is good. I have also seen Y-Blocks where the new cam bearings were too tight. I had that problem once and had to scrape the bearings.
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Got it, there was a nick in the original counter weight that exposed a small nib of metal - once taken off got got spacing to 003 and all turns well. Would like 006, so does anyone know where to buy beveled spacers as I could not find any online ...thanks for responses
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" ... where to buy beveled spacers as I could not find any online ...thanks for responses" JOHN MUMMERT offers new on his website.
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The only counterweight, on engines so equipped, is the fuel pump eccentric counterweight. Most have a spacer, instead of the counterweight. That has nothing to do with the cam thrust. They are items 6290. What you need is a 6265 that is .006 thicker than 6269.
Lawrenceville, GA
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Got it. Had a small nick on inside of counter weight that when tightened did not allow cam to turn. Once sanded off was able to get 3 on the back lash. Book said 1 -12 with 6 ideal. Does anyone know where to pick up the inner beveled spacers so that I can get to the ideal 6 backlash? Thanks all for the help, appreciated
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