Taking engine out burning oil

[yozzer74]

Well I'm going to after take my engine back out the smoking is getting worse . The bike has only done 50 miles . I know I will have to change gaskets but will I have to buy new oil seals . Or can I reuse them . Any ideas on what I should look for when I get it apart as to why it's smoking . I will try get another video of the bike running to show the amount of smoke . I had the exhaust off number 1'3'4 had a lot of oil in the ports . Just to recap bike had new rings fitted and valve guides had valves recut and seats . Thanks yozzer

[yozzer74]

https://youtu.be/FI0__SzOS7s

[Bryanj]

Incorrect valve to guide clearance or bad stem seals is my guess

[yozzer74]

In what way guides too big . When you put stem seals on do they just push on wondering if I haven't fitted them correctly.

[onethumb]

Dude proper gutted for you, I know exactly how that feels.


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[philward]

I'm with Bryan given that its happening on 3 cylinders and with what you have replaced

[MarkCR750]

Seriously annoying that it's not possible to remove the head with the engine in the frame, but it does look as though your got oil leaking past the valves, if you get a mate involved though the engine will be out in less than a couple of hours, then assess the problem an hour or so, rebuild top end not a big job, engine back in a couple of hours, what I'm saying is it's a couple of weekends including waiting for parts, if you haven't got any mates (😄) I'll come and help you provided you're within 50 miles of Derby , PM me if you need a hand.

[onethumb]

What mark said. I know it's not a big help but I just did mine last week (I was a few hrs from turning it over when I found the issue) in just under three hours. Removed the lot then lifted the frame off the engine. On my own! I've got no friends.


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[yozzer74]

Lol no friends . I removed it on my own the first time . I'm sure I can rope some one in to give me a lift with it Hopefully . Just  hoping it's not the bores that's the issue .

[mike the bike]

This may help....

http://www.sohc.co.uk/index.php/topic,11851.msg90777.html#msg90777

[Bryanj]

Depends who fitted the guides, if a car guy he will have given too much clearance for the valve stem

[yozzer74]

It was a car guy who fitted them but if that was  the issue would  it not have smoked from the start . ??

[MarkCR750]

Hi Yozzer, just a thought but is it worth putting a few more miles on it before stripping?, it won't harm anything other than getting a bit of carbon build up perhaps, and you could get lucky and find that it's the rings that need further bedding in, that said it does look like a valve stem/seal issue but giving it another 100 miles of varied revs wouldn't take long, (that's if it will keep running without fouling the plugs of course), I'm just thinking that Pete said his smoked a lot until it bedded in.

[Tomb]

If its simply a valve guide, could you not use a compressor connected to the plug hole to hold the valve up, and do the job with the engine in with head on. Or the rope trick.

[paul G]

If its simply a valve guide, could you not use a compressor connected to the plug hole to hold the valve up, and do the job with the engine in with head on. Or the rope trick.

I have done the rope trick before, certainly worth it just to check if the stem seals are on correctly.