351C oiling system
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Joined: Nov 2004
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351C oiling system
I'm going to build my 71 351C 4V and put it in a fox chassis mustang. My question is does anyone have any tips for me as far as the oiling system goes? I know the Cleveland engines have a poor oiling system and the block is weak but i want this engine to last. Plan on running NOS with a 3500 stall converter. Had the engine before but lifters kept collapsing on me I'm assuming due to poor oiling system they have. Any info on helping the 351C's oiling system would be great.
I would just put the 351C 4V on a Windsor block to make a clevor but i cant seem to find the track boss intake and dont want to pay $500+ just for a intake.
I would just put the 351C 4V on a Windsor block to make a clevor but i cant seem to find the track boss intake and dont want to pay $500+ just for a intake.
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Joined: Dec 2003
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From: iowa
actually lifters collapsing isn't the usual problem with the oiling system on the cleveland unless someone put the large restrictor on the oil passage in the #5 main bearing saddle when they were using hyd lifters this is not a good idea.
The biggest problem with the oiling system is not getting enough oil to the rear main bearings due to excessive lifter to bore clearence expecially on the drivers side allowing to much oil to "leak" past the lifters to fast and using up all the oil the pump can put out. The other problem is because the oiling system puts the oil to the lifters first, anddue to poor oil drain back system they can and will pump all the oil from the pan up to the heads. There is a couple things that can be done to fix that, easiest one is to look at the drain back hole in the back of the heads and block deck surface you will find they do not line up very well so what you want to do is champher the holes to allow for better flow through them back to the pan I did it by taking a drill bit that would barely fit down the hole in the head set the head on the block and then lightly drill through the head to the deck surface and remove the head you will see the misalignment and can then take a die grinder and cut that out then do the oppisite side of the hole on the head a small amount.
Also even though there is some disagreement on this I run the external bypass line from the front oill passege to a T under where the oil sending unit is screwed in.
The biggest problem with the oiling system is not getting enough oil to the rear main bearings due to excessive lifter to bore clearence expecially on the drivers side allowing to much oil to "leak" past the lifters to fast and using up all the oil the pump can put out. The other problem is because the oiling system puts the oil to the lifters first, anddue to poor oil drain back system they can and will pump all the oil from the pan up to the heads. There is a couple things that can be done to fix that, easiest one is to look at the drain back hole in the back of the heads and block deck surface you will find they do not line up very well so what you want to do is champher the holes to allow for better flow through them back to the pan I did it by taking a drill bit that would barely fit down the hole in the head set the head on the block and then lightly drill through the head to the deck surface and remove the head you will see the misalignment and can then take a die grinder and cut that out then do the oppisite side of the hole on the head a small amount.
Also even though there is some disagreement on this I run the external bypass line from the front oill passege to a T under where the oil sending unit is screwed in.
