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Snowcat Restoration & Modification Projects Forum Major Restorations, Upgrades, and Non-Stock Snowcat Modifications

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  #1  
Old 03-10-2019, 08:23 PM
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Default Bombardier Bombi Restoration

I recently purchased a starter through Boggie at MN Outdoors (thank you!) and after looking at how I was going to replace it......made the decision to start on a full refurbishment (will need to pull the engine). I finished the SW-48 last year and figured why not.....it’s a journey worth doing again!



[IMG][/IMG]

[IMG][/IMG]


Having fun!

Bob
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Old 03-10-2019, 10:14 PM
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Default Re: Bombardier Bombi Restoration

Comes right apart. You should that done in a week or 2.
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Old 03-11-2019, 12:42 PM
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Default Re: Bombardier Bombi Restoration

Lol.....no fun in a two week project. I’ll do this beauty justice....make her like new!

Bob
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Old 03-12-2019, 09:22 AM
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Default Re: Bombardier Bombi Restoration

Yup a Bombi needs some love to!!!!

Regards, Kirk
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Old 03-13-2019, 01:40 AM
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Default Re: Bombardier Bombi Restoration

Let the games begin... :)
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Old 03-15-2019, 05:25 PM
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Default Re: Bombardier Bombi Restoration

Hi Bob
There fun projects
I completely took apart 5 Bombis and restored them over the last few years
I always put all new bearing in the complete machine and new bushings in the diff
One thing I learned is if your going to foam the tires get the rims sand blasted and either powder coated with epoxy paint .i found after a bit the tires start to move a bit on the rims
Water gets in and the rims rot and there’s nothing you can do
I had 3 disintegrated on me in the last 2 years the tires were filled when I got the machine
Have fun
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Old 03-17-2019, 07:07 PM
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Default Re: Bombardier Bombi Restoration

Trying to locate a starter for my SW-64F. I've got a 251ci Chrysler flathead. Parts store hasn't been to helpful. Any good leads out there?
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Old 03-17-2019, 08:08 PM
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Default Re: Bombardier Bombi Restoration

Quote:
Originally Posted by Hipboy11 View Post
Trying to locate a starter for my SW-64F. I've got a 251ci Chrysler flathead. Parts store hasn't been to helpful. Any good leads out there?
Try these guys
Phone number lower right
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Old 12-01-2019, 09:24 PM
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Default Re: Bombardier Bombi Restoration

Bombi is officially apart and ready for a “back to new” rebuild. I pulled the engine to redo the clutch and did a compression test while I had it out......and found a bad cylinder ....#2. Decided to mount the engine , pull the head.......and #2 cylinder has a “leak”. Not sure if it’s coolant or oil.....but taking the block/head in for a cleaning/pressure test. I’ll likely get a rebuild kit and make her like new. Luckily, the cylinder walls looked brand new....along with the cam and crank (I’ll have them checked for cracks as well). Oh.....didn’t notice a rear main seal leak until I pulled the transmission....40 year old machine, it was ready for some attention.











Having fun!

Bob
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Old 12-02-2019, 08:07 PM
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Default Re: Bombardier Bombi Restoration

. by the ''dark'' color, oil soaked would be a good guess,... did it smoke ''blue'' when it first started. looks like a badly worn piston ring/cracked/broken,... plenty of carbon ''build-up'',... other cyls. not as bad. did you by chance perform a compression test. shine a light into the intake ports , to see if leakage was present; valve guide seal. a lot of engines don't use a guide seal on the exhaust, plus the heat & outlet flow ''wisk'' most evidence away. if you were ''passing'' coolant out of the engine, usually you would smell a ''sweet'' odor, or ''grey-ish / white'' smoke could be present sometimes, if no visible leak is obvious,... and lots of other things also,... to be continued,...
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Old 12-02-2019, 10:42 PM
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Default Re: Bombardier Bombi Restoration

It sure did......lots of blue smoke. If its a broken ring, the walls show no wear (cross hatch looks like its a new engine).....making me think its the head. There was quite a bit of carbon build up (on the valves too). Ill follow up soon (engine went to the machine shop today)......pressure test will be key.

I rebuilt a Detroit diesel a few years ago due to a sweet smelling exhaust (head was cracked, fouled up a cylinder/piston.....walls were scored). Making me think (hoping)....its a stuck valve or the like on this Ford Industrial. Push rods, cam followers, crank.....they look perfect (fingers crossed).

Its the journey.....having fun!
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Old 01-22-2020, 08:08 PM
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Default Re: Bombardier Bombi Restoration

Got the engine back from the machine shop! Had the head rebuilt and inspected, block cleaned, cylinders opened + 0.020 and cam bearings installed (those are fun without the right tool). Installed the pistons Sunday ....no broken rings! Phew!











And a picture of a coyote who was right outside my pole barn...


Last edited by Bobcatbob; 01-22-2020 at 08:20 PM.
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Old 01-26-2020, 09:36 PM
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Default Re: Bombardier Bombi Restoration

Installed the crankshaft, camshaft and head this weekend. The valve lash on the intake valve was .008.....but the specs called for 0.022 on the exhaust valve. I’m going with what the manual calls out for the engine (KSG416)....but 0.022 seems like a lot. Thoughts?













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  #14  
Old 01-27-2020, 09:47 AM
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Default Re: Bombardier Bombi Restoration

.. looking good,... so , on your valve lash adjustments,... normally your intake is less than the exhaust, due to the heat factory of the exhaust temps. on the exh. valve ports & components. .020''-,025'' is a normal lash ( especially on diesels). so I wouldn't be alarmed at setting it to .022'' . it may ''tick'' slightly upon break-in & warm-up., but should go away . if not, you can always ''snug'' up the lash to like....018'' , or so , till it's quiet at operating temp. and no such thing as ''0ver pre-lubing'' everything in engine on reassembly....
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Old 01-27-2020, 03:27 PM
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Default Re: Bombardier Bombi Restoration

Thanks OlymicOrange. I use Clevite Bearing Guard for rebuilds...on almost everything. I used straight motor oil on the Tappets.....clearance is in 10ths......each one measured within .0001”.
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Old 02-02-2020, 08:36 PM
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Default Re: Bombardier Bombi Restoration

Painted the engine with Duplicolor Ford Blue. Acetoned the engine prior to remove the rust protector ....decided to paint the valve cover and oil pan blue ....though the POR15 looked good but not UV resistant (which shouldnt matter under the engine cover).

Having fun!





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Old 02-02-2020, 09:43 PM
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Default Re: Bombardier Bombi Restoration

Nice looking engine.
Fresh paint is always a good thing.
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Old 02-12-2020, 11:30 PM
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Default Re: Bombardier Bombi Restoration

Gents,

Has anyone resurfaced/machined the flywheel ? I’ve got a new clutch plate from Boggie (thank you Boggie!!).....but the Bombi’s flywheel surface looks rusty,glazed....sandblasting work? I’ve got a CNC Mill ...dust the face with a carbide endmill....?



Thoughts?

Thank you

Bob
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Old 02-13-2020, 12:38 AM
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Default Re: Bombardier Bombi Restoration

I would definitely clean that up with a light cut straight across. Once those alignment pins are out and your set up it would be nice to see the CNC in action.
J5 Bombardier
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Old 02-13-2020, 07:45 AM
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Default Re: Bombardier Bombi Restoration

. yes, definitely agree ...resurface the ''face '' of flywheel you want to remove any heat/glaze areas, etc... a flat surface for clutch disc will prevent ''chatter'' when engaging , slippage ...prolongs clutch disc life, etc... etc... lookn good .
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