Burning oil smells bad....

[FilthyLuka]

Turns out the gn is burning oil now :( well, not alot of oil. When its idling, the whitish blue smoke (thats stinky... yeesh) is only coming out a little bit... if you rev it, that mother f#cker billows out blue smoke when revving up, stops and then billows it out when revving down again :shit:

I noticed on the way home, theres a high pitched tapping (bordering on squeeky here) noise emmiting from around the exhaust (new slashcut) between 3500 and 4500 rpm...

my guesses (for the oil burning) is either valve stem oil seal or clogged oil ring... either way it looks like im pulling the head off. Now, do i need to take the entire engine out of the frame or can i just take the fuel tank off and slide the head off?

Oh yeah, theres no loss in power or difference in running in anyway... other than the squeeky tapping noise ofcourse...

looks like my baby's in hospital for a while now :bye:

any ideas on what else could be cause the oil burnin? ive stopped riding it as oil level has fallen to right on the low mark and i would like to keep my cylinder bore.

Any help is appreciated

Denis

[Mr. Peanut]

Well, for a quick fix. Fill it back up with a thicker grade of oil and see what happens. Failing that, find a 2 stroke badge and stick it on yer tank.

[FilthyLuka]

Well, for a quick fix. Fill it back up with a thicker grade of oil and see what happens. Failing that, find a 2 stroke badge and stick it on yer tank.

im already running GTX 20-50 in it cause its an older engine... i dont think i have any gearbox oil around here :sick:

[Mr. Peanut]

Good Luck :niceone:

May I suggest a GT250 Badge?

[Disco Dan]

im already running GTX 20-50 in it cause its an older engine... i dont think i have any gearbox oil around here :sick:

I used to stick about a litre of transmission oil into my mini (gearbox and engine use same oil/sump) when it started smoking, it allready had some 'smokestop' product in it and still smoked. Seemed to do the trick? Prob not a good idea on a bike though, higher revvs an all... :innocent:

[DingDong]

Well, for a quick fix. Fill it back up with a thicker grade of oil and see what happens. Failing that, find a 2 stroke badge and stick it on yer tank.

Great advice... failing that frieght the bike to Dingdong and he'll sent you $300 and register it under his name for you.(JK)

What ever it is you'll need to take the head off, check the valves and seats, the top of the piston for cracks and the rings and bore... also could be a gudgen pin under the piston.

[FilthyLuka]

I used to stick about a litre of transmission oil into my mini (gearbox and engine use same oil/sump) when it started smoking, it allready had some 'smokestop' product in it and still smoked. Seemed to do the trick? Prob not a good idea on a bike though, higher revvs an all... :innocent:

BAD FORM!!! nah, my dodgy for this repair will probably be soaking the oil ring in WD-40 overnight and blowing all the crap out of it with a compressor... bwahaha

Seriously now, i wanna do this properly, i still need the bike for another year.

[Mr. Peanut]

Great advice... failing that frieght the bike to Dingdong and he'll sent you $300 and register it under his name for you.(JK)

What ever it is you'll need to take the head off, check the valves and seats, the top of the piston for cracks and the rings and bore... also could be a gudgen pin under the piston.

Sorry, you're right. I was going to suggest running it on premix, but that can get a little expensive ;)

[DingDong]

Sorry, you're right. I was going to suggest running it on premix, but that can get a little expensive ;)

Ahhh premix 400-1 waste oil from the peanut butter factory?:Punk:

[FilthyLuka]

well, if its gonna be more than $500 to fix it i aint gonna bother... heh, if its unfixable, looks like im gonna be funding a new 250... hmm... theres a gf250 on trademe that looks pretty...

but either way, im gonna try an fix the ol' girl first...

[The Pastor]

new piston ring prehaps?

[FilthyLuka]

new piston ring prehaps?

no duh.....

[FilthyLuka]

hmm.... im gonna need to take out the valves... anyone got a valve squeezy thingiemastuff that i can comandeer? there will be a pie in it for ya.

[Disco Dan]

you can borrow my big tow rope that i attach to the 4x4... would be great at getting your engine out...:dodge:

[FilthyLuka]

you can borrow my big tow rope that i attach to the 4x4... would be great at getting your engine out...:dodge:

er... i need to get valves out... but seeing as the bike only billows out blue smoke when its being revved, its probably the rings... guess ill find out soon enough aye

[FilthyLuka]

update, i pulled the engine appart... oil ring was clogged to buggery! so, i need to go into colemans and pick up a new piston ring set. I also need to redo the top-end,cam chain tensioner and crank case cover gaskets... So, looks like im picking up some liquid gasket aswell... I checked the valve stem oil seals and there all fine. Although i did find something interesting, all the compression rings are worn down WAY past manufactorers maximum wear limits :shit: That will probably explain lack of compression... i though is was just a gn being a gn... ahh well.

The old girl is getting put back together sometime next week after my bits from colemans arrive...

Hopefully the pile of bits in my garage will turn back into my beloved alchoholics GN250

Denis

[xwhatsit]

Well good to see you got it sorted... ish.

BTW you don't need a valve spring compression tool. Maybe on higher revving more high performance bikes, the valve springs are heavier, but I own a 250 thumper too and i just pushed the springs down with a spanner (put a large nut or something underneath the head to hold the valve up) and get somebody to hoik out the collets. Grow some muscles!

[Mr. Peanut]

Good work! I take it you'll be using a decent oil from now on :)

[FilthyLuka]

Grow some muscles!

im fifteen, skinny, white, bald and dropped PE the first chance i got... hmmm... where did i put that samoan... :dodge:

[FilthyLuka]

Good work! I take it you'll be using a decent oil from now on :)

whats wrong with castrol GTX?

UPDATE: turns out the oil filter hasnt been changed for a long long time... i pulled it out and it was choka with crap and filth and general yuck. I cleaned out the oil galleries in the piston and a bunch o' gunk came out. So that got blown out with a compressor. My theory, oil filter got stuffed, muddy oil stopped getting filtered and engine/oil crap went and clogged the piston/oil ring, causing oil to seep past the oil and compression rings at get burned... SO! new oil filter has been added to the shopping list for when i go to colemans tommorow! hehe, i love workin on bikes... kinda makes me wanna get an rgv250 just to be able to constantly get my hands dirty...

[xwhatsit]

Lol well I'm 18, skinny, white... not exactly bald, I have more arm hair than most chimpanzees... also dropped PE the first chance I had.

Where can you buy those valve spring compression tools anyway?

Use Delo 400 oil. I used some Shell something-or-other the first time, but then got some of this Delo 400 shit and it owns. Gearshift felt much better. And it's cheap as hell (it's diesel oil). Before you go `argh diesel oil', I got the recommendation for it from a very smart chap on these forums called Ixion who has experience with old bikes like ours.

[FilthyLuka]

i got recommended gtx 20-50 by three people, a bike mechanic, the reconditioner dude that sold me the bike and my bro, so ive decided to use it, the bike likes it and shifting feels fine...

Im sure you can pick up a valve squeezer from repco or supercheap...

[FilthyLuka]

got the parts coming in through colemans! Ima getting there man! its gettin there... Does $95 for a full piston ring set sound right to you guys?

[FilthyLuka]

update... parts almost here... just need to get them stubborn base gasket bits off and then on goes the new stuff! YAY! hopefully its up and running by the sixteenth. Ive taken the piston and polished it while watching cartoons... its real shiny now, i can see my ugly mug in it now. :done: Cleaned out ALL of the oil galleries. ive discovered that the freezing temperature of oil is non existant... to get oil to a solid state you put it through a ginny. Ive also cleaned out the ring slots in the piston... there was gunked oil in them (kinda looked like dak, err, i mean... gunky resin. Bleh yuckies). I managed to find a tourqe wrench and a valve squeezer. Turns out dodgy uncle lez (dude i bought the bike of) also has a honer, so i might give him a whiskey or three in exchange for a barrel hone...

WOOHOO!! :Punk:

Denis