The real issue in the Triumph four cylinders is that the oil galleries
be filled as quicly as possible. As mentioned, with these engines the
oil pump is semi-submerged, with the pickup definitely always below the
surface of the oil. If the assembly grease, or a similar high-bonding
coefficient grease is used on the moving parts such as the journal
bearings, there should be no problem on startup..
Cheers.
Dave1massey@cs.com wrote:
>In a message dated 12/23/2006 10:24:38 PM Central Standard Time,
>MMoore8425@aol.com writes:
>
>
>>>>BTW I've seen instances where a dry pump won't even prime the itself.
>>>>
>>>>
>>>Even
>>>after several minutes on the starter (without plugs) and still no pressure.
>>>
>>>After dropping the pan and geasing up the oilpump the oil pressure built up
>>>very
>>>quickly, indeed.
>>>
>>>
>>>
>>
>> So what happens when they change oil?
>>
>>
>>
>>
>The TR6 oil pump (and the TR8 the two pumps with which I am familar) oil pump
>are designed with inlets and exits on the top part of the pump which puts the
>pump in a bit of a well which will hold enough oil to prime the pump. Also,
>if the engine hasn't been sitting too long the oil film will still be on the
>pump gears which will allow the pump to prime.
>
>The TR3 (and I suppose the TR4) pumps mounted below the oil line in the sump
>and priming is not necessary.
>
>Dave
>
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