Adrian,
I think I am right in saying that when you add oil to the cylinders for the
compression test what you do is improove the sealing of the piston rings.
By comparing the wet and dry tests you can identify whether there is a fault
with the rings or with the cylinder head (valves)
So, if the dry and wet tests had shown little changeand were low, then the
rings are good, but valves poor.
In your case adding oil changed the readings, suggesting a not perfect seal
of the rings, but giving a reasonable set of wet readings suggesting that
the valve seats are OK. Some variation, but not too bad.
If I remember right this is on a newly rebuilt engine and the piston rings
are still bedding in. They should improove idc.
I would say that you have nothing to worry about !
Go out and drive it !!
Guy
>-----Original Message-----
>From: Adrian Jones <AdrianJones@compuserve.com>
>To: Spridgeteers <spridgets@autox.team.net>
>Date: 23 April 1999 23:14
>Subject: Engine Rebuild
>
>
>>Hi Folks,
>>Oil consumption is now 80 miles/quart. I can now see smoke from the
back
>>when driving - not like a big plume of smoke, sort of like a haze. I
>>imagine I'm dripping a fair amount out as well.
>>Here's the funny part though - compression readings are 155, 155, 156,
155.
>>That's pretty darn good, isnt it? After adding exactly one tablespoon of
>>oil they go up to 210, 195, 205, 180. (1275 Midget, BTW) That's not so
>>good, is it.
>>Could I get by with fixing up the cylinder head and looking for leaks down
>>below? Or is it full time engine rebuild? Oil pressure is very good so
>>I'm kind of reluctant to attempt pulling the engine, etc, etc, etc.
>>
>>Advice much appreciated. Adrian
>>
>
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