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Depends on the figure you used. Workshop Manual quotes 15 thou, cold. =
I don't like hot as the engine is continually cooling while I'm doing =
it. I use 14 thou which is loose and 16 thou which is lightly pinched =
so I can get a better feel for it as I only check them very rarely. As =
far as I know it really only makes a difference if the engine gets so =
hot that the gaps close up and you get combustion seepage past not quite =
closed valves, which burns them. Any loss of performance is only =
secondary.
In the early years not only did I find I was adjusting them every year, =
sometimes opening them and sometimes closing them, but also getting =
repeatable gaps from one turn of the engine to the next was a problem. =
Then I discovered that at the strict rule of nine (RON) points, several =
of the valves were still changing gap. Some of them had the biggest gap =
before RON and some after. Since discovering that perhaps 15 years or =
go or more I've never had to alter them until I changed the head gasket =
last year, so hadn't been checking tem every year anyway.
PaulH
----- Original Message -----=20
When I went to reset the tappet clearance, I found the old settings =
rather sloppy. I reset them so that the gauge was snug - it slid in but =
it definitely tight. Which is correct? I know that it makes a difference =
on performance and full combustion. Yes, I did the checking while hot.
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<DIV><FONT size=3D2>Depends on the figure you used. Workshop =
Manual quotes=20
15 thou, cold. I don't like hot as the engine is continually =
cooling while=20
I'm doing it. I use 14 thou which is loose and 16 thou which=20
is lightly pinched so I can get a better feel for it as I only =
check=20
them very rarely. As far as I know it really only makes a =
difference if=20
the engine gets so hot that the gaps close up and you get combustion =
seepage=20
past not quite closed valves, which burns them. Any loss of=20
performance is only secondary.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>In the early years not only did I find I was =
adjusting them=20
every year, sometimes opening them and sometimes closing them, but =
also=20
getting repeatable gaps from one turn of the engine to the next was a=20
problem. Then I discovered that at the strict rule of nine (RON) =
points,=20
several of the valves were still changing gap. Some of them had =
the=20
biggest gap before RON and some after. Since discovering that =
perhaps 15=20
years or go or more I've never had to alter them until I changed the =
head gasket=20
last year, so hadn't been checking tem every year anyway.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>PaulH</FONT></DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; =
PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV class=3DWordSection1>
<P class=3DMsoNormal>When I went to reset the tappet clearance, I =
found the old=20
settings rather sloppy. I reset them so that the gauge was snug =96 it =
slid in=20
but it definitely tight. Which is correct? I know that it makes a =
difference=20
on performance and full combustion. Yes, I did the checking while=20
hot.<o:p></o:p></P></DIV></BLOCKQUOTE></BODY></HTML>
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