Bob:
>From your engine #, I see that you have a MK II. I would think that at
62000 miles you should dismantle the rocker assenbly and freshen it up. you
want almost zero clearence there.I rebush and then have a machine shop fit
the new shaft using a Pin honing machine. After this they will re-face, and
re-arc the tips of the rocker arms.
The spigoted washer that I am referring to is sold by Abingdon Spares. If
they dont have any, I should have some. They are the proper size to make
things right with your engine.
Cheers:
Skip.............At 03:32 PM 2/19/98 EST, you wrote:
>Hi Skip,
> A helper washer---that's an idea that I could implement, certainly.
>How helpful/thick is this washer? I don't want to blow the oil seals
>out. On the other hand, I don't want to flip a rod through the side of
>the block either.
> The rocker assembly has never been attended to except to "decoke" the
>head at 25000 miles (wasted effort-it was shiny clean thanks to Amoco
>gas) and occasional adjustments of the valves. Oh,wait, at one time there
>were shims put under the pedestals to raise them in accordance with the
>little green book, though I will probably remove them since Chip Olds'
>discussions of earlier this winter. At 62000 miles, is there likely to
>be sufficient wear to warrant work on the rocker assembly. This car has
>019 clearance on the plate, though the head is "none of the above" in the
>parts book. Engine # XPAG TD3 22308.
>Bob
>
>On Thu, 19 Feb 1998 10:32:50 -0800 Skip Kelsey <kelsey@value.net> writes:
>>Bob:
>>
>>Yes it is an XPAG. But remember, 40-45 is normal. Mine runs at 80 cold
>>and
>>55-60 hot, but I have a helper washer in the releif valve.
>>
>>Skip.....................At 12:49 PM 2/19/98 EST, you wrote:
>>>Hi Skip,
>>> Is this an XPAG engine you are discussing with Bill? I've noticed
>>the
>>>same phenomenon with my TDMkII. It's running at 40 psi when the temp
>>is
>>>75C at 3500 rpm after 1/2 hour or so, using 20/50. I've never
>>understood
>>>the pressure decrease.
>>>Bob
>>>
>>>On Thu, 19 Feb 1998 07:26:22 -0800 Skip Kelsey <kelsey@value.net>
>>writes:
>>>>Bill:
>>>>
>>>>THere is a phenomena that occurs in these engines, in which oil
>>>>pressure
>>>>does drop somewhat over about 3000 RPM. I dont know why. Normal
>>>>running hot
>>>>oil pressure is 40-45 psi. I will never assemble any engine without
>>>>using
>>>>plastigauge on ALL rod and main bearings. New is not always correct.
>>>>Did you rebush your rocker arms and install a new rocker shaft? This
>>
>>>>is a
>>>>major cause of low oil pressure.
>>>>
>>>>Good luck:
>>>>
>>>>SKip...............At 10:56 PM 2/18/98 +0000, Bill and Heather
>>Putnam
>>>>wrote:
>>>>>> I doubt that it is the adaptor. I would check the seal between
>>the
>>>>pan and
>>>>>> the block, where the oil pickup routes the oil. Also where the
>>>>pickup
>>>>>> attaches to the pan. If you get an airleak at these points, it is
>>
>>>>trouble.
>>>>>> Did you plastigauge the bearings when you installed the crank?
>>Did
>>>>you
>>>>>> check all the oil passages in the crank? What kind of oil
>>pressure
>>>>are you
>>>>>> getting?
>>>>>
>>>>>Skip,
>>>>>
>>>>>I will check the pan next if the filter doesn't do
>>>>>the trick. We did not plastigauge the bearings, but
>>>>>they were original Vandervell with a new Moss crank.
>>>>>
>>>>>The oil pressure is 65 psi cold on start up. Once
>>>>>the engine is warmed, it is 60 at 2600 rpm but then
>>>>>drops to about 38 at 4000 and goes up to about 42
>>>>>at 5200 or so. let the revs drop to 2600 and it goes
>>>>>right back up to 60. So I don't think it's the bearings
>>>>>or pump capacity-usually oil pressure goes up with revs.
>>>>>I'm thinking that the bypass valve may be acting for
>>>>>some reason, or there could be cavitation, but there
>>>>>is no foaming evident.
>>>>>
>>>>>I'll let you know if I find anything.
>>>>>
>>>>>Thanks,
>>>>>
>>>>>Bill
>>>>>
>>>>>
>>>>
>>>>
>>>
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>>>
>>
>>
>
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