In the first instance, a compression test should indicate No5 being low.
If so put a small amount of oil down the plug hole and do the test on this
bore again. If it rises significantly then this would confirm the piston or
piston rings are at fault.
IMHO if the overall compressions on all cyls are low I am afraid its a
major rebuild.
Adrian
TR4A CT64306 O
Wales UK
On 22 June 2014 17:27, Creig Houghtaling <creig555@live.com> wrote:
> My friend's TR6 is consuming oil. In addition, the #5 spark plug fouls
> regularly and needs to be cleaned or replaced to run smoothly again. I am
> guessing these two issues might be related... The oil fouling the plug...
> If that is the case, what is the most likely route for the oil problem?
> From the cylinder head? Or from the rings?
>
> Creig
>
> Creig Houghtlaing 314-401-7817
> St. Louis Triumph Owners Association
> www.sltoa.org
>
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