Ski-Doo Super Olympique 370 -Rotax Engine TEARDOWN!!! -Part 2
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- Опубліковано 14 гру 2024
- Back for the third chapter of this 1968 vintage skidoo Olympique (Olympic) 370 engine overhaul. The teardown continues on this old Rotax opposed twin cylinder motor. Trouble is around the corner when a seized head stud forces the diy project to a halt. After trying various degrees of persuasion, up to and including using a torch, Matt had no choice but to bring out the welding machine!! Probably the first time in a while that this old vintage sled has seen so much attention.
If you enjoy mechanics and working on old engines, this Rotax 368cc is a fun one. Made only in 1967, 1968 and 1969, skidoo offered these super 370 opposed engines in Olympique and Alpine models. They put out 18.5 hp at 5000 rpm. They have a single Tillotson carb mounted on the rear cylinder. This particular example, seems to have had a little water damage, but hopefully can be brought back to life. Stay tuned!
Music:
FCPX
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To get that stubborn head off you can feed a rope down the spark plug hole then rotate the crankshaft to use the piston to help push the head off while you beat on it with the rubber mallet
Thats a great tip! Thanks!!!
Good luck with this engine. I believe this was a 1 year production for a good reason. I was given 1 in '71 that was a space taker in a barn. I was 15 and I learned a lot about sleds in the year I attempted to keep it running. In '72 I bought a '72 440 TNT and finally got to enjoy sledding. A rare beast and I hope to hear it run well.
Yeah, it was made for 3 years, but you are right in saying that it was not a reliable piece of machinery… I’ll try my best to get it going and see where I go from there. Thanks for watching!!
Watching all your content for a second time. Great work hoping for more shows sled videos soon JeffinMaine
Really glad to hear your are still enjoying my videos!!!
@@mattsws I really do Matt,.. I will hopefully be retiring summer 2024 and I would like a project snowmobile to work on then. I have not found any yet I would like to maybe find a Cat, Polaris or Ski Doo not listed in any special sort of order just because I think? it may be easier to find parts for the big 3 when I need them. Do you belong to any Vintage Snowmobile forums? I have looked around but have not had much luck finding one to join and read.
@@jefflary5457 Yeah parts are always easier to find for more popular models. Other than various Facebook groups, I don't spend too much time in forums. Good luck on your project and keep me posted, even if its only in 2 years! Take care!
@@mattsws Thanks Matt
That motor looks mint a keeper for shure great video as always👍
Yeah, it gonna get freshened up and should be out in the snow soon enough... I hope! As always, thanks for watching!!!
Another quality upload. Lots of work on and off screen. Thanks for the efforts and I also agree you have a good engine that should work out decent. Curious on the plan for the blown out holes for recoil. We will have to wait and see…..!
Glad you are enjoying the videos! It's not in my possession yet, but I should be picking up a blown 370 motor this weekend for parts. Hopefully the fan shroud is in better shape and I can take the easy route and just swap the parts! If that doesn't work, I will have to stick to my initial plan and fix the one I have.
Another very interesting video 👍🏻
I think in the near future I may begin working on a 1978 Arctic cat jag 3000 barn find
Pretty excited for that and can’t wait of more videos 😆
Yeah vintage sleds are always fun to get up and running after so many years in hibernation! Glad you enjoyed the vid and thanks for watching!
Wow…..that on was really stuck. I probably would have ruined that.
Good job. Seriously, it doesn’t look too bad inside.
Yeah, I'm pretty lucky so far. Thanks for watching!!!
You sound 'exactly' like Lars, the drummer from Metallica!😊
Well..... Thanks! I suppose... I actually had to watch a couple interviews to see what you were referring to, but I guess I can agree. Thanks for watching!!!
Next time you come up against a cylinder head that won't come off it's better to
1) put a spark plug in the head and turn it over to use the compression to pop the head off.
2) worst case put rope down the spark plug hole to fill up the space between the piston and head then turn the nut on the clutch to press the piston against the rope popping the head off.
Those are two great tips!!! I am not sure if they would have worked in my case, because the studs were practically welded to the head!!! Thanks for the advice though!!!
Reason I’m asking is I have a 370 torn down needs put back together but I can’t find new gaskets for it anywhere
Yeah the 370’s were only made 3 yrs in the late 60’s so no aftermarket parts were ever made for them…. You have to re-use what you have or make new ones yourself! Good luck!!
@@mattsws thanks for the advice
Are you reusing the gaskets when putting it back together?
I have a set of original gaskets, but because they are rare, I will be using them to cut new ones out of gasket paper (crank and base gaskets). As for the head gaskets, i looked into the option of cutting new ones out of 0.050” copper sheet, but I think I will just use copper spray on the original head gaskets and re-use them. I think either would be fine…
@@mattsws thanks for the advice!
Yay another video
Looks like fun I've never seen a super Olympic before your videos
@@starfoxnerd88 Enjoy!
Man, that's one sticky head.🤥 I think you'll be able to save the engine, which is a good thing.
I literally worked all day on it!!!