Mr. Deere

General topics related to John Deere Snowmobiles
Mr. Deere
Posts: 3073
Joined: Fri Oct 20, 2006 12:00 am
Location: Rutland, MA

Mr. Deere

Post by Mr. Deere »

Well I tore it down And what I saw is not good. I need two new jugs and one piston at the very least. I Dented the bottom of the jug which pushed a bump in the cylinder wall destroying my piston. The other jug has like Score marks like little ridges. PICS!!!
Image
Image
Image
Image
Image
Image
Image
BOB From MASS
OWN: 1 1983 JOHN DEERE LIQUIFIRE 440
1 1973 JOHN DEERE JDX8 440
1 1982 JOHN DEERE SPORTFIRE 440
1 2000 SKIDOO MXZ 600
GOTTA LOVE THAT TWO STROKE SMELL
JDT
Posts: 5561
Joined: Wed Nov 21, 2007 1:00 am
Real Name: Todd
Location: Milbank South Dakota

Mr. Deere

Post by JDT »

Bob do you have any idea what caused the dent in the jug? That is interesting. Maybe form a tool slip by a IPO?

I hear that Danzig is hoarding jugs so maybe he can set you up.

If the dent is below where the rings run in the bore you can hone it out.

How deep are the scuffs? Can you feel them with you finger?
Last edited by JDT on Sun Nov 09, 2008 3:33 pm, edited 1 time in total.
Todd Schrupp

Milbank SD
Mr. Deere
Posts: 3073
Joined: Fri Oct 20, 2006 12:00 am
Location: Rutland, MA

Mr. Deere

Post by Mr. Deere »

Oh ya they are deep. I did slip and its right at the bottom of the jug were the two side pieces start. You can see on the piston how far up it goes. The rings aren't even close. Can I still use the piston? I think a hone would Clear up most of my problems. I cant afford 200 for new plating. Also I do have some play side to side in the rods. I hope the crank aint junk or this project might not happen.
Last edited by Mr. Deere on Sun Nov 09, 2008 3:55 pm, edited 1 time in total.
BOB From MASS
OWN: 1 1983 JOHN DEERE LIQUIFIRE 440
1 1973 JOHN DEERE JDX8 440
1 1982 JOHN DEERE SPORTFIRE 440
1 2000 SKIDOO MXZ 600
GOTTA LOVE THAT TWO STROKE SMELL
User avatar
Danzig
Posts: 4431
Joined: Wed Aug 17, 2005 12:00 am
Real Name: Paul File
Location: Van Orin, Illinois

Mr. Deere

Post by Danzig »

I do not have extras, 2 of the 4 I got yesterday are bad. Bob, looks like you need some er...alot of parts. I feel your pain. Not good by looks of it... :wall:

Pistons, rings, cylinders, and I would make sure the crank is clean, looks like some shavings may have gotten in the lower end also. :mad: It wont do you any good sending parts to me after seeing this. I am sorry about your luck, I have the same so dont get down on yourself.
Last edited by Danzig on Sun Nov 09, 2008 6:04 pm, edited 1 time in total.
1973 JDX8
1978 Liquifire 340
1980 Liquifire 440 CC Racer
1980 Liquifire 440
1982 Liquifire 440


"Gotta Lick It Before You Stick It"
Mr. Deere
Posts: 3073
Joined: Fri Oct 20, 2006 12:00 am
Location: Rutland, MA

Mr. Deere

Post by Mr. Deere »

Oh well. I do have two more cylinders but they are junk. I don't know what to do. I wasted two sets of NOS rings and gaskets and in the process ruined a motor. So new pistons and rings and Jugs are in order. Looks like I might need to sell off my other motor for parts.
BOB From MASS
OWN: 1 1983 JOHN DEERE LIQUIFIRE 440
1 1973 JOHN DEERE JDX8 440
1 1982 JOHN DEERE SPORTFIRE 440
1 2000 SKIDOO MXZ 600
GOTTA LOVE THAT TWO STROKE SMELL
JDT
Posts: 5561
Joined: Wed Nov 21, 2007 1:00 am
Real Name: Todd
Location: Milbank South Dakota

Mr. Deere

Post by JDT »

Bob take a rattail file and work the nick down but be careful not to nick the chrome above.

As long as the damage is below the area where the rings contact the cylinder walls it will be ok.

There has to be some side play in the rods just not excessive.

Before you throw in the towel take the case apart.

I know that this hurts but you can not save very engine.
Todd Schrupp

Milbank SD
Mr. Deere
Posts: 3073
Joined: Fri Oct 20, 2006 12:00 am
Location: Rutland, MA

Mr. Deere

Post by Mr. Deere »

I am just pissed that I damaged the cylinder. I don't know how all those ridges came about in the other one. I am going to split the case I have all new Gaskets and seals that are waiting. I Dont think I can run that piston anymore I think the Cylinder will be fine its below the rings. I am screwed on the other side unless it can be honed down.
BOB From MASS
OWN: 1 1983 JOHN DEERE LIQUIFIRE 440
1 1973 JOHN DEERE JDX8 440
1 1982 JOHN DEERE SPORTFIRE 440
1 2000 SKIDOO MXZ 600
GOTTA LOVE THAT TWO STROKE SMELL
User avatar
Danzig
Posts: 4431
Joined: Wed Aug 17, 2005 12:00 am
Real Name: Paul File
Location: Van Orin, Illinois

Mr. Deere

Post by Danzig »

:think: :think: :think: :think: :think: :think:

Where did you get the rings at for the factory pistons?
1973 JDX8
1978 Liquifire 340
1980 Liquifire 440 CC Racer
1980 Liquifire 440
1982 Liquifire 440


"Gotta Lick It Before You Stick It"
Mr. Deere
Posts: 3073
Joined: Fri Oct 20, 2006 12:00 am
Location: Rutland, MA

Mr. Deere

Post by Mr. Deere »

A member on here had some Form PU before they stopped carrying them. I was thinking Danzig do you have access to a boring machine. I was thinking about boring them over re plating them and getting the over sized weisco's and putting them in.
BOB From MASS
OWN: 1 1983 JOHN DEERE LIQUIFIRE 440
1 1973 JOHN DEERE JDX8 440
1 1982 JOHN DEERE SPORTFIRE 440
1 2000 SKIDOO MXZ 600
GOTTA LOVE THAT TWO STROKE SMELL
User avatar
Danzig
Posts: 4431
Joined: Wed Aug 17, 2005 12:00 am
Real Name: Paul File
Location: Van Orin, Illinois

Mr. Deere

Post by Danzig »

No, Bob.
1973 JDX8
1978 Liquifire 340
1980 Liquifire 440 CC Racer
1980 Liquifire 440
1982 Liquifire 440


"Gotta Lick It Before You Stick It"
User avatar
400brian
Posts: 5621
Joined: Wed Jul 20, 2005 12:00 am
Real Name: James T. Kirk
Location: South Central Wisconsin

Mr. Deere

Post by 400brian »

Didn't he get the rings from Duane?

'09 Vintage Challenge Survivor, and I wasn't late for supper!
'10, '11, '12, '13,'14,'15,'16,'17, '18, 19, 20, 21, 22 Vintage Challenge Survivor !
72 400 restored, Father bought new in '71
73 X8 restored
'74 340 green machine
'74 X8 9 time VC finisher
'78 Spitfire in progress
2 '75 340S 1 running, one on deck
'78 LF 440 future CC clone
'73 Skiroule RTX 440, 500 mi.
Mr. Deere
Posts: 3073
Joined: Fri Oct 20, 2006 12:00 am
Location: Rutland, MA

Mr. Deere

Post by Mr. Deere »

Ye 69 Camaro. BTW were is everybody form back in the good ol days. What ever happened to Rodimus Prime??
BOB From MASS
OWN: 1 1983 JOHN DEERE LIQUIFIRE 440
1 1973 JOHN DEERE JDX8 440
1 1982 JOHN DEERE SPORTFIRE 440
1 2000 SKIDOO MXZ 600
GOTTA LOVE THAT TWO STROKE SMELL
Mr. Deere
Posts: 3073
Joined: Fri Oct 20, 2006 12:00 am
Location: Rutland, MA

Mr. Deere

Post by Mr. Deere »

How good are these Pistons? Also what to I tell the machinist I need a .20 over bore? What d you guys recommend for cylinder wall Plating? you think I will feel any more Power? I am over trying to get this done for Winter. The bet I can do is next year.
BOB From MASS
OWN: 1 1983 JOHN DEERE LIQUIFIRE 440
1 1973 JOHN DEERE JDX8 440
1 1982 JOHN DEERE SPORTFIRE 440
1 2000 SKIDOO MXZ 600
GOTTA LOVE THAT TWO STROKE SMELL
User avatar
Danzig
Posts: 4431
Joined: Wed Aug 17, 2005 12:00 am
Real Name: Paul File
Location: Van Orin, Illinois

Mr. Deere

Post by Danzig »

Parts Unlimited rings...hmmmm....same as I was using...maybe they are a problem with factory Deere pistons. :think:
1973 JDX8
1978 Liquifire 340
1980 Liquifire 440 CC Racer
1980 Liquifire 440
1982 Liquifire 440


"Gotta Lick It Before You Stick It"
jdsledhead
Posts: 193
Joined: Sat Jul 23, 2005 12:00 am
Location: Pendleton, NY

Mr. Deere

Post by jdsledhead »

I could be wrong, but I am pretty sure the plating in the bore on the liq. cylinders is not compatible with aftermarket steel rings. I am pretty sure you have to have original style "chrome?" rings. They are also "L" rings if I remember correctly. Someone correct me if I'm stating this wrong...shooting from the hip right now at the end of a looong day.
Tim Kudla

73 JDX4
80 Spitfire
82 Trailfire 340
84 Trailfire 440
10 SnoPro 500
Post Reply