kridgleyud Posted November 3, 2017 Report Share Posted November 3, 2017 Folks. I'm going to be priming a rebuilt motor ... Oil pump already installed. I read that the starter can be used to crank motor with plugs out. Can this be done with a 6v starter and 12v battery? Car is going to be 12v long term but I also read that the original starters are OK running 12v if you do not crank them long. Would this put me in the cranking too long range? Thanks all. Quote Link to comment Share on other sites More sharing options...
dpollo Posted November 3, 2017 Report Share Posted November 3, 2017 With the plugs out, there is not much load on the starter so I cannot see any problems. The pressure should appear fairly quickly. Quote Link to comment Share on other sites More sharing options...
maok Posted November 3, 2017 Report Share Posted November 3, 2017 Yes, no problem using a 12v battery on your starter. However, you are not really 'priming' the motor like that. The purpose of priming the motor with oil is that you force oil into all the oil galleries, bearing, etc, without the engine assembly turning. 1 Quote Link to comment Share on other sites More sharing options...
P15-D24 Posted November 4, 2017 Report Share Posted November 4, 2017 We have seen this topic many times. Spinning the engine will eventually build pressure but you will have no lubrication for your mains or rods for quite some time. Better to use an external oil pressure tank attached to an oil gallery in the block. Fill the galleries from the external tank then spin the starter. If you used assembly lube on the rebuild it will be gone after 1 or 2 revolutions leaving the mains without lubrication. BTW the external tank method is what is recommended in the factory service manual. 2 Quote Link to comment Share on other sites More sharing options...
wayfarer Posted November 4, 2017 Report Share Posted November 4, 2017 X2 on the pressure tank. Quote Link to comment Share on other sites More sharing options...
kridgleyud Posted November 4, 2017 Author Report Share Posted November 4, 2017 thanks folks. I'm looking at the external tank now and will rather have the insurance than ruining a fresh motor but cutting corners. Quote Link to comment Share on other sites More sharing options...
P15-D24 Posted November 4, 2017 Report Share Posted November 4, 2017 http://p15-d24.com/links/link/139-sealed-power-t40-engine-preluber-service-tool/ Quote Link to comment Share on other sites More sharing options...
Matt Wilson Posted November 11, 2017 Report Share Posted November 11, 2017 Here's my response in a separate, earlier thread. Lots of other good info in the thread, too. http://p15-d24.com/topic/44212-priming-oil-pump/?tab=comments#comment-471145 Quote Link to comment Share on other sites More sharing options...
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