Last weekend I adjusted the valves on my '69 TR6, and was dismayed to find a
good bit of 'mayonaise' in the valve cover (but only on the VC, not on any of
the rocker train). I pulled the rocker assembly and verified that the oil
passages were all clear, and that when the engine is cranked oil comes out of
the rocker feed hole (although not a _lot_ of oil, I can see why the external
oil feed is a good idea...) I went ahead and adjusted the valves to spec and
cleaned the valve cover. I then did a compression check and got:
1 2 3 4 5 6 <--- cylinder
145 148 145 130 113 142 <--- pressure
with no change wet/dry. I spaced out and did the check without the throttle
wide open, but the numbers should at least be representative of reality. The
engine has very little blow-by, and the crankcase ventilation is working as
it should. It doesn't seem to lose water and there is no evidence of water in
the oil (on the dipstick - I haven't drained the pan yet), and the plugs all
looked the same - with light brown deposits (in fact, I don't know that I've
ever seen a full set of plugs wear so evenly before!). Given all that, why
the mayonaise? I had a toyota once that developed it, but it had a _lot_ of
blow-by. Should I be as concerned as I am? All thoughts and replies welcome
- I appeal to the font of net.lbc.wisdom!
Thanks in advance,
John
P.S. On the brighter side of things, the TR8 comes out of its winter rest in
2 weeks, and the Jaguar has been performing flawlessly since we got it
last July. Life is good
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