Oil change gone wrong

Message

matapaca · #31 Post by **matapaca** » Mon Mar 02, 2015 9:19 am

Well I managed to get the bike back on Sat and have a little look last night. Airbox had no excess of oil and the plugs were also clear of oil. I put her in first gear and she does not move. I took off the rear cylinder head cover and everything looks OK to me. I am sure the oil that is there though is old as it's very dark.

I will try and drop out the oil tonight to see if there is anything in it.

Should I take off any of the covers to look for debris ?

Dalemac - Sorry i didn't keep the old oil separate it went into a container with old oil in it. But I could measure what's left out of the 4 litre container.

Cheers
Matt

Firestarter · #32 Post by **Firestarter** » Mon Mar 02, 2015 12:50 pm

Sorry for the egg-sucking suggestion, but when you tried to move the bike in gear, did you have the plugs out? As I believe that overcoming the compression is difficult, you may have done this but not clear in your last post if they were still out when you tried.

could take out the magnetc drain plug (the one under the sprocket, that is typically fitted by gorilla), this may show if you've got some bits of "debris", however this might not be indicative as they might not have made it through the system yet, and will result in just dropping half your fresh oil out - could drop out and collect for re-use, giving you the option to check the magnetic plug?

Dalemac · #33 Post by **Dalemac** » Mon Mar 02, 2015 1:13 pm

Do what firestarter said and actually check that the pistons are moving up and down the barrel.

Come back after doing that and we'll see where to go from there.

matapaca · #34 Post by **matapaca** » Mon Mar 02, 2015 1:28 pm

Firestarter wrote:Sorry for the egg-sucking suggestion, but when you tried to move the bike in gear, did you have the plugs out? As I believe that overcoming the compression is difficult, you may have done this but not clear in your last post if they were still out when you tried.

could take out the magnetc drain plug (the one under the sprocket, that is typically fitted by gorilla), this may show if you've got some bits of "debris", however this might not be indicative as they might not have made it through the system yet, and will result in just dropping half your fresh oil out - could drop out and collect for re-use, giving you the option to check the magnetic plug?

Yeah sorry, I took a spark plug out of each cylinder head to try and turn the engine over in 1st gear, should I have tried a different gear? I will try and drop oil tonight and see if there is anything on the magnetic drain bolt.

Thanks[/img]

wayno · #35 Post by **wayno** » Mon Mar 02, 2015 1:34 pm

If you want some muscle to turn the wheel while you check the bores give me a shout, I can spare an hour tonight.

My number is 07979851746

matapaca · #36 Post by **matapaca** » Mon Mar 02, 2015 2:17 pm

wayno wrote:If you want some muscle to turn the wheel while you check the bores give me a shout, I can spare an hour tonight.

My number is 07979851746

Hi Wayne
That would be great, thanks for the offer. I have a late night docs appt at 7.30 so should defo be back by 8.30/9, it may be too late but just let me know. my tel number is 07973 162814 but text not working properly.
cheers
Matt

wayno · #37 Post by **wayno** » Mon Mar 02, 2015 3:10 pm

No problem, PM me your address and I'll shoot over tonight.

Falcopops · #38 Post by **Falcopops** » Mon Mar 02, 2015 11:40 pm

Top man Wayno, that's what I love about this place.

Also use a high gear, the higher the better makes your mechanical advantage through the gearbox much better and easier to turn the motor.

wayno · #39 Post by **wayno** » Tue Mar 03, 2015 8:16 am

We popped a plug out of each cylinder and tried turning the back wheel in all gears, it's locked solid, it doesn't look good.

matapaca · #40 Post by **matapaca** » Tue Mar 03, 2015 9:12 am

Thanks Wayne for coming up and helping, confirmed the cams aren't scored, the engine is seized and nothing in the clutch. Really appreciate the help.

We also dropped the oil, there were a few bits, nothing larger than a pin head but no flecks and no swarf. Decided to let it settle and then pour off the excess to see if anything left over. Will try filtering it as well.

Other than big ends going is there anything else that would cause an engine seize?

Cheers
Matt

Dalemac · #41 Post by **Dalemac** » Tue Mar 03, 2015 9:51 am

Well, that sucks. If it the big end its is likely it has destroyed the crankshaft.

The only other thing I can think of would be piston/rings siezed in the barrel bue to oil starvation, but that would seem unlikely now.

Really the only way you are going to know now is to drop the engine and take it to bits.

How many miles has the bike done, just out of interest?

Falcopops · #42 Post by **Falcopops** » Tue Mar 03, 2015 11:22 am

is it possible that the sprag has seized?

wayno · #43 Post by **wayno** » Tue Mar 03, 2015 11:26 am

I did wonder this last night, but that'll be a weekend job for Matt to strip and check that (it was far too cold and dark last night for that level of investigation)

Dalemac · #44 Post by **Dalemac** » Tue Mar 03, 2015 1:40 pm

Falcopops wrote:is it possible that the sprag has seized?

I don't really know much about the sprag system as I haven't had to touch mine *touches wood*. Wouldn't that require the sprag clutch to die but only after hitting the starter, it spinning a few times, engaging, and then failing before disengaging?

If so, I didn't even know that was possible!

It would explain why the starter won't spin.

wayno · #45 Post by **wayno** » Tue Mar 03, 2015 1:45 pm

If it helps anyone with a diagnosis, the clutch still works normally, pull it in and the rear wheel spins as you'd expect, release it and it locks back up.