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Author Topic: getting CB H beams apart  (Read 2620 times)
Jonny Grigg
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« on: July 18, 2009, 18:11:40 pm »

These days I am not embarrassed about asking dumb questions.... maybe I should be  Roll Eyes

Anyway, it has been a while since I have built an engine, and the last one I did I don't remember my H beams being such a bitch to get apart. These are fresh out of the box and the 5/16" bolts were done up really tight- once I shifted them I cannot get the bottom cap off. Any hints and tricks? i don't want to brutalise them.

thanks

J.  Smiley
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Peter
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« Reply #1 on: July 18, 2009, 18:25:24 pm »

i unscrew the bolts a bit and tap them slightly with a hammer with a small amount per time...
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stealth67vw
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Posts: 2261



« Reply #2 on: July 18, 2009, 18:34:51 pm »

i unscrew the bolts a bit and tap them slightly with a hammer with a small amount per time...
That's exactly how I get mine apart.
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John Bates
JB Machining Services
1967 street bug 2020lbs w/driver
12.34 @ 108 mph 1/4
7.76 @ 89mph 1/8
Jonny Grigg
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« Reply #3 on: July 18, 2009, 19:32:21 pm »

Thanks guys, I was just a bit conerned about doing that in case it damages the threads.

 Smiley
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stealth67vw
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« Reply #4 on: July 18, 2009, 20:30:25 pm »

You only back off the bolts 2 or 3 threads and tap the bolts enough to break the cap loose. Any more and you could possibly damage the threads in the cap or the bolts. You won't need a 5lb sledge hammer, a small dead blow or small ball peen hammer is plenty to do the job without damage.
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John Bates
JB Machining Services
1967 street bug 2020lbs w/driver
12.34 @ 108 mph 1/4
7.76 @ 89mph 1/8
Jim Ratto
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« Reply #5 on: July 18, 2009, 21:32:54 pm »

I use a small nylon hammer after backing bolts off 4 threads
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Steve D.
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Posts: 202


« Reply #6 on: July 19, 2009, 03:14:59 am »

Take the bolts back out and restart the motor WFO.
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Über Alles

5 tracks, 5 days, 1000+ miles.
10.77 avg. on pump fuel.
238I
Steve D.
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« Reply #7 on: July 19, 2009, 03:16:13 am »

I use a detorqueing tool.
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Über Alles

5 tracks, 5 days, 1000+ miles.
10.77 avg. on pump fuel.
238I
mr horsepower
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« Reply #8 on: July 19, 2009, 15:50:08 pm »

Just rev your engine above 6000 rpm  Grin Grin
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