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Old 02-28-2005, 20:39   #1 (permalink)
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351 severed shaft?

Hi i bought a p5 ltd for parts ,it had been rolled so i gathered the running gear would be ok . The dizzy was the only thing missing off the motor when i tried to bar it over it wouldent. When i pulled it down i found the oil pump ,dizzy shaft had been twisted off at the top and it had caused the first two con rods to grip the crank ,not damaging it thankfully (4amb). Just wondering if any one knows why this damage happened to the shaft. landau 37.
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Old 02-28-2005, 23:10   #2 (permalink)
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Re: 351 severed shaft?

Oil pump seized is my guess. Then the shaft twists and breaks. No more oil flowing but motor still running till it seized.

Last edited by silicon; 02-28-2005 at 23:18. Reason: english
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Old 03-01-2005, 23:57   #3 (permalink)
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Re: 351 severed shaft?

Thanks silicon ill get it checked.
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Old 03-02-2005, 00:00   #4 (permalink)
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Re: 351 severed shaft?

Thanks silicon ill get it checked ,is the black fe 351 oil pump the same as the blue xa/xc 351s.
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Old 03-02-2005, 00:38   #5 (permalink)
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Re: 351 severed shaft?

Quote:
Originally Posted by landau37
Thanks silicon ill get it checked ,is the black fe 351 oil pump the same as the blue xa/xc 351s.
Are asking if 302/351 XD/E oil pumps are the same as XA/C?; this is true.

The common reason for the pump to sieze or jam is the umbrella valve stem seals go hard and brittle with age and then break up. The small sections are very hard and some can manage to fit past oil pickup screen and create havoc with small oil clearance in the pump. I have seen quite a few with twists( ie 2 or 3 full rotations - but pump must have cleared itself) in the pump drive shaft as well as some totally broken. If this is the case you will find bits of old umbrella seals in the sump as well as scores in the main/rod bearing shells.
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Old 03-17-2005, 23:48   #6 (permalink)
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Re: 351 severed shaft?

Quote:
Originally Posted by silicon
Are asking if 302/351 XD/E oil pumps are the same as XA/C?; this is true.

The common reason for the pump to sieze or jam is the umbrella valve stem seals go hard and brittle with age and then break up. The small sections are very hard and some can manage to fit past oil pickup screen and create havoc with small oil clearance in the pump. I have seen quite a few with twists( ie 2 or 3 full rotations - but pump must have cleared itself) in the pump drive shaft as well as some totally broken. If this is the case you will find bits of old umbrella seals in the sump as well as scores in the main/rod bearing shells.
Well you picked the lot the whole set up is as you discibed ,as if you were there thanks mate.
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Old 03-26-2005, 03:28   #7 (permalink)
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Re: 351 severed shaft?

youn can get teflon seals or something
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