this is why u dont do skids! (back luck award)

Show everyone your mean datto projects/rides
User avatar
torqued
Datsun God
Posts: 2125
Joined: Sat Jul 19, 2008 11:49 am
aka: Adam
Location: Christchurch

Re: this is why u dont do skids! (back luck award)

Post by torqued »

If you don't know what you are doing. You are better off to send in your short block to check bearing clearances and end float, especially since you are swapping cranks over.
"It's ok, we know what to do...we talked about this a lot on the internet."
project_1200_ute
Datsun Dreamer
Posts: 110
Joined: Wed Sep 09, 2009 9:17 pm
Location: christchurch
Contact:

Re: this is why u dont do skids! (back luck award)

Post by project_1200_ute »

yeah thats the plan find a new crank and get everything measured up for bearings and get crank balanced etc too
Bartman
Committee Members
Posts: 7303
Joined: Sat Jul 19, 2008 9:04 am
Location: Datsun City
Location: Christchurch New Zealand!!!!
Contact:

Re: this is why u dont do skids! (back luck award)

Post by Bartman »

Get your wole rotating assembley balanced as one.
1st they balance your crank. Then they'll fit the front pulley, and balance that. Then the flywheel, and balance that. Then the pressure plate and balance that.
Mine was done at engine reconditioning services. They're in the east end of st aspah street. (Or at least they were?)
Probably wont be the cheapest, but their machine is very sensitive.
They don't call me the man with the rubber arm for nothing you know.............
project_1200_ute
Datsun Dreamer
Posts: 110
Joined: Wed Sep 09, 2009 9:17 pm
Location: christchurch
Contact:

Re: this is why u dont do skids! (back luck award)

Post by project_1200_ute »

i take it they balance it all outside of the motor? doesn't need to be in the block? can they check it and machine it for oversized bearings if need be?
Bartman
Committee Members
Posts: 7303
Joined: Sat Jul 19, 2008 9:04 am
Location: Datsun City
Location: Christchurch New Zealand!!!!
Contact:

Re: this is why u dont do skids! (back luck award)

Post by Bartman »

No.
They do it with the parts removed from the block.
if your engine hasn't been balanced before, you're going to have to have your rods and pistons balanced too. You'l have to remove them from the block to have that done. If they aren't done, you may still have an imbalance even with the crank, etc balanced.
They don't call me the man with the rubber arm for nothing you know.............
User avatar
classicdat
Committee Members
Posts: 3259
Joined: Wed Apr 21, 2010 9:59 pm
aka: Vaughan
Location: Datsun Central, Christchurch
Contact:

Re: this is why u dont do skids! (back luck award)

Post by classicdat »

If the rings are all good you wouldn't need to balance the rods at this time, just doing the crank on it's own would be of some benefit, if it was in getting measured up etc. but they would probably need the block as well to measure end float etc.
Once you get into something like this it's only a little bit more $$$ to do this, then you should really do that, and it's only another 50 to do this and you really should. Next thing, new engine and $2500 you have fixed a stripped stud! Have a good think about where you are at and what your plans are. A balanced engine is a sweet thing and I highly recommend it, but a fresh & balanced engine, now that's real sweet! But it doesn't come cheap!
Datsuns from A to Zed
project_1200_ute
Datsun Dreamer
Posts: 110
Joined: Wed Sep 09, 2009 9:17 pm
Location: christchurch
Contact:

Re: this is why u dont do skids! (back luck award)

Post by project_1200_ute »

tha motor has been rebuilt mint under a year ago block bores were checked come up mint same with crank im picking only clearances were checked tho and nothing got balanced dont want to spend heaps this time round really probs just balance the new crank?
Bartman
Committee Members
Posts: 7303
Joined: Sat Jul 19, 2008 9:04 am
Location: Datsun City
Location: Christchurch New Zealand!!!!
Contact:

Re: this is why u dont do skids! (back luck award)

Post by Bartman »

If I were your I'd dowel the flywheel onto the crank. You'll only have to drill a couple of holes, and buy some silver steel. (I use 5mm)
Although the end of the crankshaft is f-king hard. I Killed a few drill bits drilling into it.
They don't call me the man with the rubber arm for nothing you know.............
project_1200_ute
Datsun Dreamer
Posts: 110
Joined: Wed Sep 09, 2009 9:17 pm
Location: christchurch
Contact:

Re: this is why u dont do skids! (back luck award)

Post by project_1200_ute »

yeah i think that would be the way to go for sure, never thought it would be an issue until now but even dirty old k series motors have doweld flywheels. How just this lock it into place any better tho? surly a hi-tensile bolt as the are has to be as strong as a stud if not stronger?
broke
Datsun Addict
Posts: 998
Joined: Mon Apr 04, 2011 11:25 pm
aka: John
Location: Christchurch

Re: this is why u dont do skids! (back luck award)

Post by broke »

The original flywheel bolts would have been probably as strong as grade 8 ones anyway, with dowels you will have the high tensile bolts AND the dowels for strength.
Post Reply