1984 Jaguar XJS oil pump

Tiny
JAGIN
  • MEMBER
  • 1984 JAGUAR XJS
  • 5.3L
  • V12
  • 2WD
  • AUTOMATIC
  • 140,000 MILES
My first xjs, V12. Just wondering if the oil pump on these eng are gear driven by the distributor or?Car has been sitting for a few years, snd want to prime eng parts with fresh oil before starting.
thank you
Do you
have the same problem?
Yes
No
Sunday, February 16th, 2014 AT 6:43 PM

1 Reply

Tiny
CARADIODOC
  • MECHANIC
  • 33,699 POSTS
Good thought but you're going overboard. The oil in the passages will still be there. You aren't going to gain anything by circulating more oil through there. We prime oil pumps with electric drills to fill the passages on newly-rebuilt engines so the air doesn't have to work its way through the bearings first. Some mechanics just use engine assembly lube on the bearings, and they pack it inside the oil pump, then just start the engine like normal for the first time, and they don't have any problems.

Also consider that the oil pumps on most newer engines are driven by the snout of the crankshaft. There is no way to prime those systems except by cranking the engine. With a little assembly lube to handle those first few revolutions, the oil starts circulating so quickly, that priming isn't necessary.

Your oil pump is driven that way, by the crankshaft, so there's no way to prime it. The engine likely won't start right away. The few seconds it cranks first will be enough to get the oil circulating. Once the engine is warmed up, you can drain the old oil. It will be thinner and run out of the passages easier.
Was this
answer
helpful?
Yes
No
Sunday, February 16th, 2014 AT 7:21 PM

Please login or register to post a reply.

Sponsored links