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 bajachris88
A.k.a.: Chris Leete
23 Windows of Awesome
The international telephone dialing code for Antarctica is 672.
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 posted on August 21st, 2009 at 07:52 PM |
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crankshaft end float... To be measured with crankshaft pulley? otherwise i screwed :P
The type 3 motor i recently obtained was said to be a good runner, no smoke, no noise/bang/rattle, with a miss in cylinder 3 and that is all.
having a look, pistons/barrels look excellent! despite soot from a rich run. even the piston rings look great, factory machining lines for the pistons
are still on there.
however, whilst cleaning my block, (with the pulley off, only the flywheel attatched to the crank shaft)... i can physically pull it and push it in
and out by a matter of a huge amount! i will measure it.. but friggen huge compared to 0.003 to 0.006 inch factory specs.
its like, a mm and a bit.
Does it make a difference if the crankshaft pulley is not fitted? it current isn't fitted and wasn't while i was moving the crankshaft. however,
every video i have seen that pulley has been attached. and i'm wondering whether the pulley itself takes up some of the slack, and hence with it
removed, caused me to have this scare.
otherwise its a new main bearing, align bore for me, if the case hasn't been pounded by the moving crankshaft.
Conrod main bearings seem good though...
(ô_!_/ô) (ô_!_/ô)
69' baja: kombi box, thing spindles, irs, disc front, type 3 rear drums, 2 inch lift kit, 31x10 rears. 
New engine in process: 94mm p&bs, 74mm C/w chomol Crank, 35.5x39 SP heads, turbo. Wierd combo, hopeful torque monsta! |
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Craig Torrens
A.k.a.: Craig Torrens
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| posted on August 21st, 2009 at 08:33 PM |
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pulley doesn't affect the end float.......have you measured it or just guessed ?
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bajachris88
A.k.a.: Chris Leete
23 Windows of Awesome
The international telephone dialing code for Antarctica is 672.
Posts: 6661
Threads: 534
Registered: April 8th, 2005
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Mood: A bee bit ma' bottom, now ma' bottom's big!
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| posted on August 21st, 2009 at 08:55 PM |
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guessed a measurement... but the movement is psyko. will take a caliper reading tomorrow and perhaps even a video. its nutz.
so i guess i'm rooted! i can see the movement
(ô_!_/ô) (ô_!_/ô)
69' baja: kombi box, thing spindles, irs, disc front, type 3 rear drums, 2 inch lift kit, 31x10 rears.
New engine in process: 94mm p&bs, 74mm C/w chomol Crank, 35.5x39 SP heads, turbo. Wierd combo, hopeful torque monsta! |
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Craig Torrens
A.k.a.: Craig Torrens
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| posted on August 21st, 2009 at 09:01 PM |
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yeah but you can see the movement in a tappet as well and its .006........so don't come to any conclusion until you measure 
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bajachris88
A.k.a.: Chris Leete
23 Windows of Awesome
The international telephone dialing code for Antarctica is 672.
Posts: 6661
Threads: 534
Registered: April 8th, 2005
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Mood: A bee bit ma' bottom, now ma' bottom's big!
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| posted on August 21st, 2009 at 09:05 PM |
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 i might have hope then!
i have a set of vernier calipers... i spose what i will do (tight arse method lol) i push the crank as far in as i can and out, measure both as a
distance from the case and find the difference.
Thanks Craig. This might be good, we'll see soon!
(ô_!_/ô) (ô_!_/ô)
69' baja: kombi box, thing spindles, irs, disc front, type 3 rear drums, 2 inch lift kit, 31x10 rears.
New engine in process: 94mm p&bs, 74mm C/w chomol Crank, 35.5x39 SP heads, turbo. Wierd combo, hopeful torque monsta! |
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cb john
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| posted on August 21st, 2009 at 09:22 PM |
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even feeler gauge can give you a good indication..
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Joel
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| posted on August 21st, 2009 at 09:34 PM |
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dial indicator on the flywheel is the best way to get a truely accurate measurement
have you dropped the flywheel off to make sure theres 3 shims in there?
i once scored an engine with about 2mm play which i thouight the worst with but found it only had 1 shim in there
the oil pressure when hot will give a bit of an indication of whats going on if the front bearings pounded out
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1303Steve
A.k.a.: Steve Carter
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| posted on August 21st, 2009 at 10:44 PM |
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Hi
If you take the flywheel off, push on the face of the main bearing and see if it moves, if not get someone to push on the crank from the other end
while you look at the bearing to see if it moves or use your verniers if you cant get a dial indicator.
Another way to measure end float is makeup a solid adjustable stop against the flywheel, then you can measure it with feeler gauges.
Steve
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bajachris88
A.k.a.: Chris Leete
23 Windows of Awesome
The international telephone dialing code for Antarctica is 672.
Posts: 6661
Threads: 534
Registered: April 8th, 2005
Member Is Offline
Location: Tanah Merah, SE-QLD
Theme: UltimaBB Pro Blue ( Default )
Mood: A bee bit ma' bottom, now ma' bottom's big!
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| posted on August 22nd, 2009 at 05:33 PM |
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Ok, so i appologise, it was a case of blind Chris and the 'Fish was this big" :P
according to the rough vernier caliper measurement, play is 0.45mm, equates too 0.0177 inches, which is still too big, but not as bad as 2 mm lol.
I haven't taken off hte flywheel to look at the shims yet. hopefully its got one or so short of 3, i'm sure that'll sort her out 
I guess the thing that freaked me out.. is that i can move this crankshaft by hand, in and out. i don't need to pry. is that supa bad?
(ô_!_/ô) (ô_!_/ô)
69' baja: kombi box, thing spindles, irs, disc front, type 3 rear drums, 2 inch lift kit, 31x10 rears.
New engine in process: 94mm p&bs, 74mm C/w chomol Crank, 35.5x39 SP heads, turbo. Wierd combo, hopeful torque monsta! |
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Newt
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| posted on August 22nd, 2009 at 07:10 PM |
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I might have missed the point, but wouldnt more shims increase the float?
Newt
It is as it is - If you didnt enjoy today, you've missed the opportunity.
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Joel
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| posted on August 22nd, 2009 at 07:48 PM |
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nah reduces, basically its packing up the crank so it cant move as much
Chris that really is FA, some thicker shims will take care of that
i had a 71 1500 bug with a 1600 twiny that i sold to mate
it had abit of crank movement
from out at the farm into Lismore which is 19KMs it would go from the full mark on the dipstick to the add mark.
and i wasnt burning it either, pumping it all out passed the main bearing 
when i finally dropped the engine out and chucked the dial indicator on it only had.....4.6mm float
still ran well considering
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1500S
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| posted on August 22nd, 2009 at 07:49 PM |
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| Quote: | Originally
posted by Newt
I might have missed the point, but wouldnt more shims increase the float?
Newt
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Shims are between thrust face of bearing 1 and flywheel. Thicker shims = less endfloat. 3 shims in assembly.
DH
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