Dart Little M sportsman top end oiling issue SBC
 

Now that I'm using a DART block instead of Gen 1 junk I'm NOT yet getting oil to the rockers during priming or after running for 20-30 seconds. Fresh build , not yet run for any length of time. I did NOT groove lifters BECAUSE I was told by Dart it isn't really ness. on the small blocks , more so on the big blocks.
Comp lifter ( plus .300 ) std full body lifter.
The guy that owns the machine shop I used suggested grooving..........but neither HE nor Dart told me that if I don't it will not oil adequately. Neither dude told me it was essential. I'm done until this crap is figured out and I ain't a happy camper.
Now , unlike before with the old Chevy block and because these lifters won't come out with the GD heads on ........if the solution is grooving the lifters , I have to pull not only the intake but the heads as well.
Yes I'm very pissed , can you tell? I just finished putting this SOB together and may end up pulling half this S#H%IT off!
So , no restrictors in block either...........is it the lifters not grooved delaying oil to rockers? Will they oil before killing the pushrods / rocker cups.? Yes I used assy lube on tips / cups.
Seems to me I recall some guys using Dart blocks with priority main oiling melting pushrods , perhaps because they restricted AND used improperly prepared OR WRONG lifters..........

Anyone?

Re: Dart Little M sportsman top end oiling issue SBC
 

Takes me longer than 30 seconds of priming a new assembly to get oil out of the rockers. Thought something was wrong first time.

Re: Dart Little M sportsman top end oiling issue SBC
 

Is this a solid roller or HYD roller ??

Which Little-M Dart block do you have?? With billet caps or Nodular iron caps ??

Is this a wet sump application.

Should not run restrictors as the lifters have the oil holes on the side of the lifters if solid lifters and push rods are oiled of the lifter bore clearance.

Whats your lifter bore clearance ?? As that should have been checked before the block went out the door.

If the lifter bore clearance is to tight it will be hard to get oil to the push rods and they may seize up!!! to loose and you have to much oil be pumped up to the top end ....

Re: Dart Little M sportsman top end oiling issue SBC
 

If it takes long to prime ONCE , it'll always be slow to get up there?

Re: Dart Little M sportsman top end oiling issue SBC
 

Nope. All the oil galleys won't be full of air after initial prime. My rockers oil right away on start ups after primed once.

Re: Dart Little M sportsman top end oiling issue SBC
 

Sometimes after being machined , washed and dryed, it takes quite a while to get oil to all rockers. Helps if engine is rotated 45-90degrees 8 or more times while priming. That's been my experience anyway ( lifter clearance set)

Re: Dart Little M sportsman top end oiling issue SBC
 

Standard OEM SBC oiling system sends oil to the camshaft FIRST then to the crankshaft areas ---A Dart block has had the oil passages redesigned to have priority oiling to the crankshaft FIRST then to the cam prevents wiping out rod/main bearing damages-- FED 387

Re: Dart Little M sportsman top end oiling issue SBC
 

Uh , yeah..........thanks:)
Anyway.

Re: Dart Little M sportsman top end oiling issue SBC
 

So , can I assume everyone ground the small groove in to the lifter bodies?

Re: Dart Little M sportsman top end oiling issue SBC
 

As suggested, try rotating the engine 45-90 degrees and prime for a good minute at each rotation. Repeat 8-10 times. Might not hurt to pull the intake, rockers and push rods to verify that oil comes out the top of the lifter. 16 pushrods can hold a lot of air.

Let us know what you find. -Al