Blew it up, continuing story WITH PICS

[SteveTR6guy]

Had a chance to start tearing down the Beo this afternoon. As I got all the body parts off, here's what I saw. What's missing here?


The astute among you (or at least not blind) will quickly notice that there's a hole where the dipstick is supposed to be. How could THAT happen?!?
This shot shows a little more of the head/block joint, which at least in this view looks to be OK.


Yeah, I know, you can't tell from the outside if the gasket is blown or not. My semi-educated guess at the moment is that the oil plug blew off somewhere, causing the engine to go into oil-starvation which in turn overheated and warped the head. I'm hoping to see intact parts when I pull the head tomorrow.....

[SteveTR6guy]

One more shot, this one from above looking at the carb.


I'm still trying to figure out how ALL the coolant got out and all over everywhere. As I pulled the airbox off the carb, a bunch of green slime trickled out -- it was even inside the airbox!!
So at this point, I'm figuring on a light mill on the head to flatten it out, new head gasket, teardown and clean the carb, and just for insurance replace all the coolant lines. What else?
I'm done for the day. Got a date with Mr. Beefeaters tonight....

[SteveTR6guy]

One last thought, since I obviously have to find a new dipstick. Is it common for these things to disappear like mine did? It wasn't loose -- I cranked it down pretty good last time I was in there about 100 miles ago. Is this just something to add to the pre-flight check every time I ride? Has anybody thought of modifying these things to accept safety wire?

[tomd]

Yes Very common this type they can get HOT and loosen Usually Not between a 4500-5500 oil change I never have to chk the Rotax ever between 6K oil changes But this is why ya should I do reach in erry so often though not to chk but make sure tite I cannot help myself The Two Ive had Have been Soo good to me Id feel Real Bad if something like this happened to mine Thats A real Nyce Bike Steve and Id do exactly what you are doing I doubt the Head is warped much at all You'll know soon enuff.Prolly Diiint Warp anyting Just the Gas /press had to escape under the intense heat Prolly a Divet where press came thru gasket If heads that costly It could be plasma sprayed (built up) Grind to spec . I mayve a spare here in a container ..

[tomd]

one o the guys here had a bag of em and a few filters for sale some time ago . The damn thing do get Hot But ive honestly never seen one off . Loose yes no not on last thread either . Damn shame The s5 or others do not seem to loosen up on their own . Maybe O ring on oil cap got hot / broke down and started the Mess

[SteveTR6guy]

Tom, YOU DA MAN. always feel better when I see a response from you.
One good thing, if I have to go that far... I have the OEM head, piston, and cam that came out of it when it got all the Malossi bits installed. It's such a gas to ride with the mods, I hate to go back to stock but it neats the alternative.
I'll know more tomorrow....
Hey, where do I find a head gasket for this thing? I'm pretty sure the FLAPS won't have one, and I didn't see anything on the AF1 site. Any thoughts?
Thanks

[tomd]

Your going to have to Get a Malossi Repl I believe Unless the Atlantic 200 will work which I would think Would .. its the same rotax engine made to 170 177 w/e rotax did to allow claiming 200 Me thinks Piston Diameters close enuff to pass The Stock 150 gasket Nooooo.. Could take Old to a Sheet copper place and Have Em Punch ya out one from old The Copper unit mite last a lifetime..

[V-Power]

There is a pretty thorough discussion on the overheat issue and oil dipstick blowout if you follow this thread to the end:

http://www.apriliaforum.com/forums/s...purchase/page2

[tomd]

Yep Rem well and after all that Wk they had a Fubar piece o rubber in top of carbie .

[jlindh]

Steve, I bought the filters and dipsticks and can certainly part with one. pm me.

[SteveTR6guy]

PM sent
Thanks
Steve

[motoniko77]

Rotax = joy and pain


the green slime of which you speak is nothing but water mixed with oil. Basically you have burned the head gasket. follow the reasoning.
The water is very slowly drawn into the oil sump or through the water pump or through the head gasket. meeting at this point the hot oil has evaporated and you blew up the oil cap.
Change the head gasket but also controlled by the water pump.
Hello