[TR] update - the mystery continues

[Geo Hahn]

I recall you initially had a problem with an incorrectly installed oil ring
(overlapped instead of end-to-end).  Sure sounds like that again since leak
down and compression tests reveal nothing.

I have a hard time imagining valve guides could cause the massive blue
smoke you're seeing - but a failed oil ring sure could.

Geo

On Fri, Oct 16, 2015 at 5:25 PM, Rye Livingston <ryel at mac.com> wrote:

> The mystery continues.
>
> First off my bad.  It's clearly blue-ish smoke, not white.  It's burning
> oil not water.
>
> So today I cleaned up the plugs and fired it up again to get it up to
> normal operating temperature, and the smoke was billowing down the street
> like police had been throwing out tear gas canisters.  Your comment was if
> it lingers for a moment or three it's oil. This cloud is lingering for
> 10-20 plus seconds as it was rolling down the street.
>
> Got it warmed up and first did a leak down test.  Rotated the engine to
> get each piston at the top of it's stroke with the values closed for
> ignition, then put 100 psi into each cylinder and 1, 3 and 4 held steady at
> 98psi. #2 held steady at 95psi.  No issues uncovered.
>
> Next was a compression test.  Engine still warm, throttle wide open, all
> four came up to 150 lbs plus 1-2 lbs. No issues uncovered.
>
> So our thoughts at this point is it can't be a head gasket if we're
> getting good compression numbers and good leak down test numbers.
>
> Additional info - When I bought this TR4a head for this rebuild, it had
> been serviced many years ago but never installed on an engine.  The machine
> shop tore it down and installed new hardened valve seats and checked
> everything out - supposedly.  I was told the valves, valve springs and
> valve guides were all good, but now we're thinking this whole thing could
> be related to bad valve guides.
>
> Not that this should matter, but I also installed a big bore kit so
> sleeves and pistons are all new.
>
> I expect the head will come off again but hope to zero in on the problem
> before dismantling it.
>
> Regards,
> Rye
>
>
>
>
> On Oct 15, 2015, at 07:46 PM, ptegler <ptegler at verizon.net> wrote:
>
> seconded...
>     blue is 'burning' oil, not just super heated oil blowby which is
> usually white.
> If it dissipates almost immediately it's water, if it lingers for a moment
> or three.... its oil
>
> ptegler
>
> On 10/15/2015 10:51 AM, Brad Kahler wrote:
>
> Lots of white smoke doesn't always indicate water/coolant.  On my TR4
> engine that had been freshly rebuilt when I bought it I had billowing
> clouds of white smoke.  After several head gasket changes I finally
> realized that the new liners (liner & piston kit) had not been cross
> hatched so the rings didn't seat.  This allowed for massive amounts of oil
> to be sucked up and out the exhaust.  Result was white smoke.
>
> So the question is, were the cylinder liners cross hatched so the rings
> would seal?
>
>
> On Thu, Oct 15, 2015 at 9:15 AM, Chris Simo <ccsimonsen at gmail.com> wrote:
>
>> Is that water or oil?    Lots of white smoke would indicate to me a blown
>> head gasket and water on the plugs.
>>
>> Did you replace the head gasket with a new one when you fixed the oil
>> ring?   Probably not recommended, but I've reused them (1x)  in the past,
>> but always painted them with the copper coat head gasket paint.
>>
>> I've blown head gaskets that leaked water into the pistons only -- no
>> water in the oil.  But you may want to check your oil for contamination.
>>
>>
>>>
>>
>>
>>
>
>
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> --
> Paul Tegler ptegler at verizon.net www.teglerizer.com
>
>
>
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