What would a leakdown test tell me other than if the compression rings are O.K.
Also is it possible the head gasket could be leaking or the block could have a c___k maybe where the stud is nearest to the rockerarm oil hole?? Please someone say NO that's not possible...
At any rate I'm planning to rip and tear after consulting a friend of mine who is an ex. racer and engine builder this weekend.
Also do you all feel it would be worth the extra pennies to use some total seal or other chrome faced rings or stick with cast??
P.J.
--Previous Message--
: PJ - is this a repeat problem in the same
: block? If so, you might want to check
: and make sure the bore is not distorted
: when you (unfortunately) take it apart.
: In TR4 engines poor coolant flow at
: the rear will occasionally cause
: overheating and a ring seating issue -
: maybe you have the same issue here.
: Not sure how to check it, but make sure
: coolant comes out of all the passages.
: TR4 guys have resorted to tapping the
: coolant passages in the front of the
: block, putting in plugs with smaller
: holes, all to force more coolant flow
: to the rear. Just a wild guess - it's
: probably something simpler like an oil
: ring.
: Leak-down gauges are pretty cheap and I
: use mine at least twice a year to see
: if my race engines need valve or ring
: work. Only caveat- with the valve
: overlap of some cams, you need to
: remove the rocker arm assembly prior to
: taking readings, cuz otherwise one of
: the valves is likely to be slightly
: open at BDC and you wont get a good
: reading.
:
: --Previous Message--
: That's the most common type of oil
: ring,
: 2 rails with a spacer, sometimes with
: an expander underneath the spacer.
: The ends of the spacer usually are dyed
: 2 different colors so it is easier to
: see that the ends are butted up
: correctly.
: Glen
:
: --Previous Message--
: Unfortunately you won't know what's
: going
: on until you tear it down. After my
: own engine problems earlier this year I
: can really sympathize with you.
:
: As for the oil rings, I have a thought
: that may or may not apply. The last
: set of pistons I installed used two oil
: scraper rings separated by a sort of
: corrugated metal spacer ring. The ends
: of the corrugated spacer were supposed
: to butt up against one another but
: during my installation they kept
: wanting to pop over/into each other so
: the corrugations locked together. I
: spent a lot of time with my ring
: compressor trying to get things
: installed in a manner that I could
: still peek in there to see that the
: corrugated ring was properly in place.
: I still wonder if I got them all
: correctly installed.
:
: Doug L.
:
:
: --Previous Message--
: Based on the symptoms, oil rings are
: just
: a possibility. There is no way to check
: them without a teardown and visual.
: There could be a compression ring
: problem, which didn't show as low on
: the compression test because of the oil
: sealing it and showing slightly high. A
: leakdown test will show just how well
: sealed it is, at least the compression
: rings, if you have a tester, or can
: borrow or buy one.
: Hang in there, it's just a lump of
: metal...
: Glen
:
: --Previous Message--
: Hi again.
: After reading Oscars posting I must
: admit I'm a bit jealous. I can't get
: 2000 miles on an engine let alone
: 200,000
: As an update to my smoke issues:
: After removing the valve cover and
: rocker arm and taking off the valve
: springs on No.6 intake. Which was the
: worst cylinder. The valve seal looks
: perfect and so does the guide to stem
: clearance.
: As for crankcase breathing I'm just
: not sure what to think. I have never
: seen a TR engine with absolutely no
: blowby until this one. With the engine
: running and the filler removed from the
: valve cover there is nothing coming out
: the top. Either this is a really tight
: fitting engine compression wise, or
: there is no crankcase venting going
: on.. Oil does flow back to the
: crankcase though so it must be O.K.
: Also I restricted the external rocker
: arm oiler down to a .050 Diameter hole
: and it made no difference from
: unrestricted.
: It's looking like a tear down is in
: the works but I hate to do the same
: thing over and over again. The bottom
: line is why does this thing keep
: burning up oil control rings???
: P.J.
:
: --Previous Message--
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