Caliper banjo bolt thread engagement
 

I have a pair of C5 front calipers and '02 Camaro rear calipers going on my '68. To transition from hard lines to soft lines I purchased a set of Russell braided lines for a C5. In that order I also picked up a set of Earl's 10 x 1.0 Banjo bolts. Everything looks good at first glance, but I do wonder how much banjo bolt thread engagement is enough. On initial assembly I seem to have roughly 1/4" of thread. I'm sure I'll pick up a little when the washers bed in as they're tightened, but I don't anticipate that'll amount to much.

Does this seem like enough? I've also seen people mention that 10mm x 1.5 were "correct" however I didn't know at the time if the 1.5 was length or thread pitch. Would the 10mm x 1.5 be a better choice?

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http://i5.photobucket.com/albums/y16...s/IMG_8062.jpg

I just happened to stumble across one of the old C5 stock lines when looking for something else. The russell line where the banjo bolt block is marginally thicker (1/8" max).

I guess that's enough for me to call it good.

That's not enough engagement for me to be comfortable.

10 x 1.5 usually refers to pitch.. so if the 1.0 is the correct pitch for your calipers, then not sure what to tell ya.

I'd usually like to see 3 more threads showing than what you have now.

-Dale

Thanks Dale. That's my gut feel as well. Even though the stock C5 components seem similar, it doesn't make me much happier.

I'll be checking out a few differing brands of banjo bolts to see if I can find something a little longer.

as a side note: I did later confirm that the 2nd number is referring to thread pitch. It's only coincidence that the full length of the bolt (including head) is also 1"

Chrck out pure choice motorsports, they should be able to help you out. Very nice people answering the phones too.

This evening I dug up a stock C5 banjo bolt, and I think I found the problem. One of these things is not like the other.
https://c1.staticflickr.com/3/2842/3...24ab836e_c.jpg

I'm not sure exactly what these Earl's bolts are for, but they're certainly not for any application I'm interested in.

I'd recommend staying clear of PN 997517ERL

Small parts like these can often be found on Rockauto.com at quite good prices. I used two of the C6 banjo bolts recently and they were 1/2 the cost of other aftermarket pieces.