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Old 06-19-2018, 04:32 PM   #26
weq92f
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Re: bbc retrofit roller update

My front cover did not make contact with the button. My button measures nearly an inch so it's the biggest one available and it sits nearly flush with the sprocket edge so no loss there.

After much tossing around I finally decided not to spend more cash and just modify my cover to make it work. Beat the crap out of it with big hammer until it made contact with the button then slowly beat it back out until I managed to get the clearance to .006 on the dial with the cover and gasket torqued down.

I may yet do a new cover down the road if this one ends up making noise or causing timing fluctuations. My guess right now is that it will be fine. Moving on.




-klb
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Old 06-24-2018, 09:48 AM   #27
Mike C
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Re: bbc retrofit roller update

Did you use some sort of thrust bearing/washer on the cam gear? You may not have to, but on mine I ran the Summit billet 9 keyway double roller chain with Torrington bearing to protect the block. The 3/4" big block thrust button worked fine on that setup.

The Comp kit came with a cam sprocket that did not have bearing or bushing so I guess they don't think it required, but I felt better about long term reliability with it.
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Old 06-24-2018, 12:49 PM   #28
weq92f
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Re: bbc retrofit roller update

My timing set from Comp didn't allow for a bushing or bearing between the cam sprocket and the block. I did quite a lot of reading on the subject and decided in the end that this setup should do OK without. That is, as long as I get the thrust clearance correct rather than just jamming the cam hard against the back stop with the front cover.
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67 C10 fleet fuel injected '70 402, 700r4, 3.73 posi
07 335 sport turbo 6sp
94 Trans Am GT LT1 6sp posi -- sold after 22yrs
99 540 sport V8 6sp -- sold
73 240z L24 4sp -- given to friend
68 C10 step 350/350 3.73 open -- sold
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Old 06-24-2018, 12:58 PM   #29
weq92f
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Re: bbc retrofit roller update

Decided to drop the oil pan to replace the gasket...

Bad idea...

Not enough room to drop it all the way...

So now I own a 2 ton engine hoist!



-klb
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67 C10 fleet fuel injected '70 402, 700r4, 3.73 posi
07 335 sport turbo 6sp
94 Trans Am GT LT1 6sp posi -- sold after 22yrs
99 540 sport V8 6sp -- sold
73 240z L24 4sp -- given to friend
68 C10 step 350/350 3.73 open -- sold
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Old 07-01-2018, 01:08 PM   #30
weq92f
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Re: bbc retrofit roller update

Got the pan removed finally and found that most of the bolts had been way over tightened which has bent the pan up pretty bad. Can't imagine how this thing wasn't leaking far worse than it was. The worst of the damage measured 1/8 inch of bolt hole bending up toward the block due to over tight bolt. Most of the damaged bolt holes measured just under 1/8 inch.

Good thing I took it off!

-klb
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67 C10 fleet fuel injected '70 402, 700r4, 3.73 posi
07 335 sport turbo 6sp
94 Trans Am GT LT1 6sp posi -- sold after 22yrs
99 540 sport V8 6sp -- sold
73 240z L24 4sp -- given to friend
68 C10 step 350/350 3.73 open -- sold
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Old 07-01-2018, 11:18 PM   #31
Captainfab
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Re: bbc retrofit roller update

Some people seem to think that if tight is good enough, then REALLY tight is even better. Quite often that is when problems occur.
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