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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
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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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Old 08-31-2018, 07:37 PM   #32
weq92f
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Re: bbc retrofit roller update

Progress...

I used the one piece fel-pro gasket, attached it to the pan with some plastic coated wire. Then got the pan up onto the block and just started two of the rear-most rail bolts. Climbed around to the top and situated the front gasket teets into the holes in the timing cover then secured the pan as tightly as possible against the gasket to hold in in place ( I used the wire again here ).

After making sure the gasket was properly in place along the rear main cap channel, each rail bolt was installed ( the wire was easily removed ) and then torqued in sequence beginning from the center working out toward the end caps. Only then would the two pan to front cover bolts reach. I torqued the rails to 60 in-lbs and the two cover bolts to 100 in-lbs.
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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 08-31-2018, 07:49 PM   #33
weq92f
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Re: bbc retrofit roller update

Before I locked down the pan, I went to check the cam thrust clearance one last time. There was none. The cam was being held tight against the rear stop by the timing cover. This! This after my having spent a load of time and effort to create .006 of cam thrust clearance with that cover torqued down. I have no idea how this happened?

That cover is now on the left-over parts pile. I replaced it with a Cloyes quick-button two piece cover. This thing has a built in button that is adjustable with the cover installed. Done.

Placed a head up on there to check P/V clearance...

-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 09-01-2018, 11:08 PM   #34
weq92f
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Re: bbc retrofit roller update

No P/V issues so...

Got the heads on there and torqued down. No way I could have done this alone with the engine in the truck. Good friend of mine came by and helped me get them safely over the fenders and on the block. Thanks Tom!

-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
weq92f is offline   Reply With Quote
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