Seized engine

[sloth]

Well after 3 years of letting my baby sit I decided its time to get it running again. I went and picked up a new battery, tore apart the carbs, rebuilt them and replaced all the oils. Then the sad part, I found the engine is seized.   I have filled both cylinders with PB Plaster and I am going to let them sit for a couple of days. I think I should order a new set of rings. Can anyone think of anything else I should replace?

-James

[Justin B.]

What a drag!  You might get lucky and after it gets limbered up the rings may be OK...  Although this won't affect your engine issue, it would be a good idea to probably flush/fill the brake system as well...

[sloth]

Good idea on the brakes I did not think of that one. I am going to order some new plugs too. I just got back from playing out in the shop and found it was the right cylinder froze. I took the head off and cleaned everthing out. It was pretty mucky. I then bolted everything back up and filled the cylinder with PB blaster. I think I will let it sit till Sunday, then I will check to see if its broke loose. I am getting excited about riding again. Already started drawing out a new rack for the back of the bike.

-James

[Ed Miller]

If those were your pictures in the previous forum, I thought the rack looked well done!

For new people, despite Sloth's karma title, he (as far as I know) started our first iteration of our R65 forum.  

Sloth, hopefully rings is all you will need, but I haven't been in that situation.  Good luck!

[Semper Gumby]

If it's an 1980 or earlier with cast iron liners - hone the cylinders (a dingle berry hone is easiest).  I would change the oil before running it either way once it breaks loose.  But especially so with that PB blaster in it.  It is leaking into the sump I Gar-ron-tee.

TTFN,

[Jon_P]

i used the PB blaster soak for a day or two, place it in a high gear and rock it back and forth and pop the clutch. it has helped me break free alot of jap engines. i have also used ATF but it doesnt seem to work any better than the PB blaster stuff. I have heard of people using Coca-Cola? i always thought that was a bad idea because of the sugar into a engine. i guess as long as it is flushed real well.

[dewjantim]

Liquid wrench always worked for me.....Dew.

[thrang]

If nothing else works a good (if very bodger) fall back is pullling the heads off,  squirt a lot of wd40 round the piston and then get a mate to hold a plank of wood over the bore while you give it (the plank)a good few wacks with a manchester spanner and the vibe usually cracks the piston free.

BUT be careful as its very easy to knock a fin off the barrel.

[sloth]

Well after two weeks of soaking and some taps with a hammer via a block of wood the engine is now free. I took the cylinder off and honed it. Put everything back together and I will be damned but it fired right up. I need to adjust the valves, there is some clicking. It felt so good to hear it fire up after almost 3 years. Compression will be checked when I do the the valves, but from a hands behind the exhaust test, they feel pretty good. A little more work and I will be on the road again. Its nice to see this place seems to be going strong!

-James

[NC Steve]

Nice job, James! It's great to know that an (otherwise ok) frozen engine can (maybe) be salvaged with some patience, time, oils and repeated gentle taps from a hammer!

Do you have any ideas on something I read recently about storing an engine for longterm rejuvenation by filling it with auto trans fluid/ATF?
This was a new one to me, but, if it works, something we should all at least be aware of.

Good luck with the rest of the bike. [smiley=thumbsup.gif]

[nhmaf]

I have also heard about storing engines/machines by filling them up with a low viscosity oil, like ATF,
to prevent rusting.    Certainly, rifles packed with cosmoline and wrapped in oil paper can last for
decades without rusting (though the cosmoline can harden and require some strong solvents to
get out of the mechanism) so the theory for preserving engines, trannies, etc. makes alot of sense to me.

[sloth]

Well after working on the bike for a while I have had to come to the conclusion its shot. The seized side will only keep 85psi and the left side has only 120psi. So far calling around has led to me believe finding a  new set ain't going to happen. So if anyone knows of a set for sale, engine for sale, or a R80 engine for sale please have them email me. I really want to get back to riding again.
-Sad James
sloth at r65 dot org

[Melena]

Sad Sloth James,

I am so sorry to hear about the troubles with your bike.   [smiley=sad.gif]   I'm sure that someone here or on Boxerworks can help you find what you need.  But you know that already.  

I'm thinking that we are learning more and more that these bikes don't like to sit around.  I guess we'll just have to get out there and ride some more and keep those cylinders moving.  

[SCJJR65]

Damn.....Bummer, James.    I hope you find "the deal of a lifetime" in a good engine, and real soon!  I'll keep an eye out for you!

[Lowen]

R75 engine on E-bay.
http://cgi.ebay.com/ebaymotors/Engine-motor-bmw-r75-7-r80-r80gs-1977-r100-r100rt_W0QQcmdZViewItemQQcategoryZ35615QQihZ018QQitemZ280068399109QQrdZ1QQsspagenameZWD1V