[TR] [6pack] Carbon on top of pistons - engine experts please help!

[FRED E THOMAS]

Better idea is to adjust your carb and get the richness out of there.  "FT"
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----- Original Message ----- 
From: "Greg Gelhar" <ggelhar at earthlink.net>
To: <6pack at autox.team.net>; "triumphs" <triumphs at autox.team.net>
Sent: Monday, May 05, 2008 8:54 AM
Subject: Re: [TR] [6pack] Carbon on top of pistons - engine experts please 
help!


>I was re-reading an article printed in a club newsletter from the distant
> past about an old time mechanic who recommended water injection to
> eliminate this problem. His technique was to remove the air cleaner
> assembly and use a pump-up garden sprayer and spray water into the
> carburetor while the engine was operating at 2000 RPM. The premise was the
> steam generated by the water would clear the carbon from the piston tops.
> The amount of water was regulated as to not stall the engine. He reported
> that after this treatment the run-on problems were gone.
>
> Does anyone have any thoughts to the validity of his actions?
>
> Greg Gelhar
> 1973 TR6
> 1980 TR8
> Osseo, MN     .
>
>
>> Subject: [6pack] Carbon on top of pistons - engine experts please help!
>>
>> I had engine run-on issues prior to my restoration project, so while the
> engine was on the stand, I pulled the head to look for carbon deposits on
> top of the pistons.  I found significant deposits on five of the six.  I
> used to run an external oil feed but stopped after going through oil at a
> fast rate (ring problem?).  When I removed the oil feed, oil consumption
> was greatly reduced but my run on problem was present.  What remedy do I
> have available to a) clean the pistons and b) prevent the problem from
> happening again.  I'm assuming that if my engine is put together and 
> broken
> in correctly, the external oil feed should not contribute to additional 
> oil
> consumption.  BTW, the engine was rebuilt in late 2005 with new pistons,
> rings, bearings, etc for .030 over bore.
>> Thanks in advance for advice you can share.
>> Andy
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