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#277733 - 10/05/09 9:11 pm '73 TR7RV Thick white smoke from right pipe  
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jonkull Offline
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My Tiger has been parked for about six weeks. We've got some cool weather this week so I decided to take it to work. When I kicked it over this morning thick white smoke (not blue or black) started pouring out of the right pipe. It doesn't smell like burning oil...more like something hot (I wish I could explain that better but I can't). I'm wondering if this is just steam from moisture in the pipes or something...could explain the 'hot' smell...or if it could be something more serious. FYI - It was in the shop back in June and at the time compression was 'excellent' though I don't remember specific numbers.


1973 Triumph TR7RV
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#277741 - 10/05/09 11:34 pm Re: '73 TR7RV Thick white smoke from right pipe [Re: jonkull]  
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Fisherman Offline
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Tennessee
jonkull, If it were any water cooled motor I would say water. In an air cooled motor, white smoke is rare, but almost HAS to be water vapor, but I wouldn't imagine it continuing to smoke (white) for more than a minute or so. How long did you run it? If you have the original megaphones on it they may hold enough water to smoke a while.....did your dog lift his leg up your pipe? (Or would that be yellow smoke? sick )


'Never argue with an idiot, they'll bring you down to their level, and beat you with experience'

'72 TR6
'12 Hinckley Scrambler
'95 FLHTC Road Sofa
#277745 - 10/05/09 11:56 pm Re: '73 TR7RV Thick white smoke from right pipe [Re: Fisherman]  
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jonkull Offline
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I didn't run it long because I didn't want to hurt anything or get stranded so I took my other bike to work. It was on maybe 30 seconds. Blipped the throttle a couple of times before killing the engine. When I get home from work I'm going to take it around the block and see if it clears. At least it started in one kick after sitting all that time. That's something...


1973 Triumph TR7RV
#277762 - 10/06/09 3:37 am Re: '73 TR7RV Thick white smoke from right pipe [Re: jonkull]  
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RetroRod Offline
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Compression test the cylinder and go from there. RR


'72 Bonneville
"He who praises you for what you lack wishes to take from you what you have." - Don Juan Manuel
#277774 - 10/06/09 7:12 am Re: '73 TR7RV Thick white smoke from right pipe [Re: RetroRod]  
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Blapper Offline
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Wet sumping gets my vote.

Blapper redwine

#277779 - 10/06/09 8:41 am Re: '73 TR7RV Thick white smoke from right pipe [Re: Blapper]  
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RetroRod Offline
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Originally Posted By: Blapper
Wet sumping gets my vote.

Blapper redwine


Hey Blap, good to see ya!! (having trouble seeing anything through all these ones and zeros)

Tell me mate, would not both cylinders be affected by a wet sump? I've not encounted it before and so it did not occur to me. RR

Last edited by RetroRod; 10/06/09 8:43 am.

'72 Bonneville
"He who praises you for what you lack wishes to take from you what you have." - Don Juan Manuel
#277780 - 10/06/09 9:00 am Re: '73 TR7RV Thick white smoke from right pipe [Re: RetroRod]  
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gearhead1951 Offline
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"wet" sump is still oil , "white smoke" is still steam ! my money is on th' silencers containin' a little water

#277824 - 10/06/09 5:17 pm Re: '73 TR7RV Thick white smoke from right pipe [Re: gearhead1951]  
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jonkull Offline
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jonkull  Offline
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Well I ran the bike when I got home from work yesterday. Took it for a quick quarter mile run around the block and smoke cleared part way into it. No smoke this morning either. I'm inclined to say steam because it was white and smelled 'hot'. My mother-in-law was ironing something last night and that's kind of what I smelled. Not my mother in-law...the iron. smile I'll check compression regardless.

Last edited by jonkull; 10/06/09 5:18 pm.

1973 Triumph TR7RV
#277830 - 10/06/09 6:59 pm Re: '73 TR7RV Thick white smoke from right pipe [Re: jonkull]  
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Blapper Offline
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Hi Rod, Howzit bro?

Well, I don't know the bike and it could be that one oil control ring is working better than the other. That will not show up on a compression test BTW Jonkull.

Jonkull: The clincher is whether the smoke hung around for a long time or disappeared quickly like steam does....?

Blapper redwine

#277861 - 10/06/09 10:35 pm Re: '73 TR7RV Thick white smoke from right pipe [Re: Blapper]  
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jonkull Offline
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jonkull  Offline
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Originally Posted By: Blapper
Jonkull: The clincher is whether the smoke hung around for a long time or disappeared quickly like steam does....?


That's a very good question but I can't answer it. It's been windy here. Smoke could have disappeared quickly or been blown away in the wind. If it smokes again I'll pay attention. What would it mean if it hangs around?

I don't know how relevant this is but last year I had two occasions where the bike hadn't been ridden in a while. Both times it was hard to start and when it did the right cylinder didn't kick in for a few seconds even though the left was running. I had brought it to a mechanic (I tend to break things when I work on them myself) and he couldn't find anything wrong with it. It's run beautifully ever since and I've never had that problem again.


1973 Triumph TR7RV
#277905 - 10/07/09 8:52 am Re: '73 TR7RV Thick white smoke from right pipe [Re: jonkull]  
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gearhead1951 Offline
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oil smoke will linger , steam wont !

#277911 - 10/07/09 11:37 am Re: '73 TR7RV Thick white smoke from right pipe [Re: gearhead1951]  
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JubeePrince Online content
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Back on the mainland!
Jon,

After closely reading your posts, I suspect it is neither, steam, gas OR oil.....it is something MUCH more serious: it is the endgases (see: smoke) from your wiring harness!

Get yourself a jar of replacement smoke and all will be well.....



HTH! grin

Steve


'77 T140J
"Vintage Bike". What's in your garage?

"The paying customer is always right."

Fitting round pegs into square holes since 1961...
#277940 - 10/07/09 5:18 pm Re: '73 TR7RV Thick white smoke from right pipe [Re: JubeePrince]  
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jonkull Offline
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Oh...I've released that magic smoke before but it's full now.

Seriously though...no smoke from the tailpipe again today so I'm going to let the bike sit until Monday so I can see if it smokes again and if it dissipates quickly. I hope this is nothing serious. I don't have the money for this now...


1973 Triumph TR7RV
#278552 - 10/12/09 5:56 pm Re: '73 TR7RV Thick white smoke from right pipe [Re: jonkull]  
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jonkull Offline
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Looks like this smoke lingers...so I suppose it's not steam.


1973 Triumph TR7RV
#278667 - 10/13/09 5:50 am Re: '73 TR7RV Thick white smoke from right pipe [Re: jonkull]  
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Blapper Offline
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I didn't think it would be.

My money is still on wet sumping. Good news is that it is cheap to investigate and cure. Does your oil level drop when you leave it for a while, and does it come back up to full when you've run for a couple of minutes?

Blapper redwine

#278784 - 10/13/09 9:40 pm Re: '73 TR7RV Thick white smoke from right pipe [Re: Blapper]  
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jonkull Offline
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I'll check oil level tonight and let you know. What's the cure?


1973 Triumph TR7RV
#278852 - 10/14/09 6:29 am Re: '73 TR7RV Thick white smoke from right pipe [Re: jonkull]  
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Tiger Offline
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The central flywheel would throw oil up into both bores if the engine was wet sumped, did you get significant oil out of the crankcase breather ?

If the problem does not reoccur forget it.

It is possible that if the rockerbox was "wet" you may have had oil leak past the OD of a valve guide onto a closed inlet valve, that could have sat until you fired the engine up.

Still not an issue, particularly given the time the engine was laid up.


1969 TR6R
7.62 x 51 is not a maths puzzle.
#278854 - 10/14/09 7:06 am Re: '73 TR7RV Thick white smoke from right pipe [Re: Tiger]  
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Blapper Offline
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If it does turn out to be wet sumping, you have to take off the oil pump, dismantle it and clean it very thoroughly with carb cleaner, then re-seat the valve balls and replace them with new.

Use the search function at the top to get the full nine yards.

Clean oil is the way forward so fit an oil filter if you don't have one (use search for that too as it has previously been discussed fully).

Even if it doesn't turn out to be wet sumping, you will have learned something you'll probably need to know in the future!

Blapper redwine


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