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September 30, 2014, 08:11:53 PM

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Author Topic: Engine rebuild  (Read 858 times)

ace.cafe

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Re: Engine rebuild
« Reply #15 on: February 08, 2014, 10:42:51 PM »
OK - Thanks everyone, all and any advice is much appreciated. Once I've spoken to my dad's friend and asked him about repairing at his i'll open her up and let you know how I get on.

Any advice on workshop manuals?

james

I advise you to get the complete technical package from our hosts at NFIELD Gear. 3 texts, including th factory parts book, factory service manual, and Pete Snidal's book. Between all 3 of them, and asking questions here, you should get through it.
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DanB

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Re: Engine rebuild
« Reply #16 on: February 09, 2014, 02:30:24 AM »
I'm not recommending this method of disassembly, but it gives you an idea of what's next.

http://youtu.be/M_WD5m9RKdM
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Arizoni

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Re: Engine rebuild
« Reply #17 on: February 09, 2014, 04:46:32 AM »
I'm betting it won't require the big hammer and the board to get the head off.

Some of the Indian mechanics do tend to use some pretty primitive methods for an engine teardown.   ;D
Jim
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High On Octane

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Re: Engine rebuild
« Reply #18 on: February 09, 2014, 02:25:05 PM »
I'm not recommending this method of disassembly, but it gives you an idea of what's next.

http://youtu.be/M_WD5m9RKdM

Oh My God!  That poor freaking head!  Have they never heard of using the right tool for the job!?  Now pry bar, no dead blow?!     :o
Did anyone else notice the massive gouge he put into the head mating surface trying to beat and pry that head off at 3:10?  I hope he plans on decking the head now.

Scottie J
« Last Edit: February 09, 2014, 02:28:05 PM by High On Octane »
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tooseevee

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Re: Engine rebuild
« Reply #19 on: February 09, 2014, 05:11:15 PM »
Oh My God!  That poor freaking head!  Have they never heard of using the right tool for the job!?  Now pry bar, no dead blow?!     :o
Did anyone else notice the massive gouge he put into the head mating surface trying to beat and pry that head off at 3:10?  I hope he plans on decking the head now.

Scottie J

            I started watching these videos of Indian bike shops years ago & I'm continually amazed. And the cringe factor during some of them is 100%.

            But then there are also some videos of the gorgeous restoration work that comes out of some of these hole-in-the-wall shops. It's amazing.

             If anyone has not seen it, find the video of the guy who pin-stripes the gold on the gas tanks. He's the Indian Von Dutch of Enfields & he is deadly serious.

             That whole friggin' factory should be very proud of itself.
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baird4444

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Re: Engine rebuild
« Reply #20 on: February 10, 2014, 12:17:38 AM »
    or...
    you get lucky and the top of the piston came off.
    yea, it happens....
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Blltrdr

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Re: Engine rebuild
« Reply #21 on: February 10, 2014, 01:14:04 AM »
Cool pic! Put a hinge on the piston top, crank on side, clown inside and......... Pop goes the weasel. Literally!
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jameswilkinson

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Re: Engine rebuild
« Reply #22 on: April 09, 2014, 03:08:02 PM »
Hi all!

Thanks for all your tips. To let you know. I took the head off and it was the piston that had shattered. I have bought a new one and am in the midst of replacing the old one.

There are quite a few shards of the metal including bits of broken piston ring that have however come and are swimming in the sump. Ive bought an extendible magnet which has managed to pick up a fair bit of the metal however I was wondering if anyone had any other techniques for getting the metal shards out. Perhaps I could drain them out? or rinse them out with water?

Any tips again much appreciated. Hopefully can do the fix for < 100 :)

cheers all!

ace.cafe

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Re: Engine rebuild
« Reply #23 on: April 09, 2014, 03:20:28 PM »
Unfortunately, there's not an easy way to clear the sump of metal.
Short of a complete disassembly, I have heard of people taking the engine out of the bike, and filling up the sump with kerosene, and shaking it around, and then turning it upside down and pouring it out. Repeat until no more metal appears to be coming out.

Depending upon where some of the metal got to before the engine stopped, don't be too surprised if you see some main bearing failure in the not too distant future.
Home of the ACE Fireball 535 Bullet,  Ace GP Hi-Lift Roller Rocker Head . Pistons, cams, etc. Highest performance Bullet engine mods available .  AVL mods. Redditch 700/750 Twin mods. UCE kit soon.

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barenekd

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Re: Engine rebuild
« Reply #24 on: April 09, 2014, 10:05:28 PM »
Hte first engine I totally tore down and rebuilt was a BSA Gold Star, essentially the same as a Bullet. It's not terribly hard, but you will need a new Crankshaft, rod bearing and rod in an upgraded mode. these assemblys are available assembled, which is the way to go. I had to assemble my BSA Crank.
The rest of the stuff, main bearings, piston and such are going to be dependent on what shape the original parts are in. You need to tear the engine down and see what parts are ruined.
While you're doing this disassembly,  take copious pictures so you can see/remember where everything goes! It'll help immensely. This means from when you start to take the engine out, through engine disassembly. You really don't want any parts left out when you think you're done!
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High On Octane

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Re: Engine rebuild
« Reply #25 on: April 10, 2014, 01:52:31 AM »
Yeah.  If your piston exploded you most likely need to do a complete tear down and rebuild, and don't order any parts until you have it completely disassembled and you know exactly what you need.  When a piston grenades like that you are almost guaranteed to need to replace everything.  Also, I bet your cylinder is going to need reboring as well with the addition of an over-sized piston, I'm sure you have nasty gouges all over the cylinder wall.  Just replacing the piston without additional work will cause low compression and bad oil consumption.  Basically a waste of your time.

Can post some pics of the carnage so we can see what exactly happened?

Also, pistons are not made of steel so a magnet isn't going to get any of those chunks out of there anyways.

Scottie J
« Last Edit: April 10, 2014, 01:55:11 AM by High On Octane »
Bulldog Kustoms - Denver, CO
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The Blackhawk
1958 Enfield/Indian 711cc Twin

Building The 1st Ever Ace Performance
Enfield Twin Full Race Heads