Search found 11 matches

by jcroson
Sun Mar 03, 2019 6:33 am
Forum: Squarecase Early 860/900 Crossover Gearchange Engines > 860/900 GT
Topic: 75 860GT Timing Question
Replies: 14
Views: 8468

Re: 75 860GT Timing Question

Found the other dot. Had to pry the washer up a bit to see it!

All lined up and installed.

Thanks all!
by jcroson
Sat Mar 02, 2019 2:04 pm
Forum: Squarecase Early 860/900 Crossover Gearchange Engines > 860/900 GT
Topic: 75 860GT Timing Question
Replies: 14
Views: 8468

Re: 75 860GT Timing Question

So I've read through the comments and consulted my manual regarding timing. My understanding is that if I put the rear cylinder at TDC, line up the timing marks on the head all should be good for the rear cylinder. I've also tried to line up the timing marks for the front cylinder, but the horizonta...
by jcroson
Mon Feb 18, 2019 4:01 pm
Forum: Squarecase Early 860/900 Crossover Gearchange Engines > 860/900 GT
Topic: 860GT Right Side Cover...stuck??
Replies: 10
Views: 3960

Re: 860GT Right Side Cover...stuck??

There is no head left on the hex but, it's completely gone.

I've soaked it with WD-40. I'll wait a few days and apply some heat and see how far I get.

Good Lord, I hope the previous owner didn't use some crazy adhesive!
by jcroson
Sun Feb 17, 2019 3:35 pm
Forum: Squarecase Early 860/900 Crossover Gearchange Engines > 860/900 GT
Topic: 860GT Right Side Cover...stuck??
Replies: 10
Views: 3960

Re: 860GT Right Side Cover...stuck??

Thanks, but I got the top one you indicate. It's the bottom one that's been snapped off.
by jcroson
Sun Feb 17, 2019 10:01 am
Forum: Squarecase Early 860/900 Crossover Gearchange Engines > 860/900 GT
Topic: 860GT Right Side Cover...stuck??
Replies: 10
Views: 3960

860GT Right Side Cover...stuck??

I'm trying to remove the alternator cover on my 860GT due to a snapped fastener. I've removed the shifter assembly and all surrounding bolts, and also the plastic plug. The shop manual suggests a dead blow hammer to loosen the case, depicting striking it near where the shifter assembly was removed. ...
by jcroson
Wed Feb 13, 2019 4:05 am
Forum: Squarecase Early 860/900 Crossover Gearchange Engines > 860/900 GT
Topic: 75 860GT Timing Question
Replies: 14
Views: 8468

Re: 75 860GT Timing Question

The rear piston is at the top of it's stroke, the front piston is moving down. Use the rear wheel rotating in proper direction to see the direction the engine rotates. Both flats on engine bevel shafts should face out at this point. Rotate head shafts till punch marks line up, flats should face in....
by jcroson
Tue Feb 12, 2019 7:14 am
Forum: Squarecase Early 860/900 Crossover Gearchange Engines > 860/900 GT
Topic: 75 860GT Timing Question
Replies: 14
Views: 8468

Re: 75 860GT Timing Question

Gardner wrote:
Sat Feb 09, 2019 7:08 pm
Both heads go on at the same time.
Right, but how do I know the proper orientation of the front cylinder bevel gears?
by jcroson
Sat Feb 09, 2019 1:13 pm
Forum: Squarecase Early 860/900 Crossover Gearchange Engines > 860/900 GT
Topic: 75 860GT Timing Question
Replies: 14
Views: 8468

Re: 75 860GT Timing Question

It isn't as easy on a springvalve as on the desmo but here's the method. Turn the bevel-shaft of the heads untill the marks on BOTH gears lign up exactly. For one cylinderhead, this is with both valves closed, for the other one valves are open (but in fixed position). AND the Oldhamcoupling should ...
by jcroson
Sat Feb 09, 2019 1:02 pm
Forum: Squarecase Early 860/900 Crossover Gearchange Engines > 860/900 GT
Topic: 75 860GT Timing Question
Replies: 14
Views: 8468

Re: 75 860GT Timing Question

Gardner wrote:
Fri Feb 08, 2019 6:50 pm
I use this - https://willyg.homelinux.org/Bevel_Timing/timing.html
Makes it easy to understand.
Thanks so much for this, it does help. I was able to manually rotate the bevel gears on the head until the marks lined up, and moved the top piston to TDC. You really helped, thanks!
by jcroson
Sat Feb 09, 2019 1:01 pm
Forum: Squarecase Early 860/900 Crossover Gearchange Engines > 860/900 GT
Topic: 75 860GT Timing Question
Replies: 14
Views: 8468

Re: 75 860GT Timing Question

Maybe it`s camera angle or my fading eye sight but the 3rd photo doesnt look TDC to me. The exhaust valve is partially open. Interesting camera angle too..............looks like the camera is on the piston at the bottom of the stroke. At TDC on any given cylinder your cam lobes viewed through your ...
by jcroson
Fri Feb 08, 2019 6:08 am
Forum: Squarecase Early 860/900 Crossover Gearchange Engines > 860/900 GT
Topic: 75 860GT Timing Question
Replies: 14
Views: 8468

75 860GT Timing Question

My 860 has been leaking oil from the front cylinder for some time, and in my haste to fix it, I pulled the heads off to do both before turning the motor to TDC (I think). I now find myself in a pickle so I start reading the manual to determine how to set the timing. I think it involves removing the ...

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