Oil Pump Question.
Thread Starter
Melting Slicks
Joined: Nov 2000
Posts: 2,738
Likes: 53
From: Bogart GA
Oil Pump Question.
I pulled my distributor and noticed the oil pump shaft was very lose. It feels like i could just pull it out. Does the shaft mount into the pump or is there a coupling similar to how the oil shaft connects to distributor? haven't replaced an oil pump in a very long time.
Team Owner
Joined: May 2001
Posts: 87,357
Likes: 1,592
From: Western NY
There's a plastic "sleeve" that slips over the distributor shaft and oil pump drive stud. it "captures" the two shafts, and keeps them in alignment. However, as any plastic can fatigue from heat, there's no guarantee that yours is still intact.
Both Melling and Moroso , maybe even ARP, make intermediate shafts with a metal sleeve, that's pinned in place. A good upgrade.
Both Melling and Moroso , maybe even ARP, make intermediate shafts with a metal sleeve, that's pinned in place. A good upgrade.
Le Mans Master
Joined: Apr 2011
Posts: 6,284
Likes: 1,171
From: Hermosa
Two shafts are fit together in a tongue and groove type coupling with a plastic sleeve to keep them from sliding apart. Sometimes the plastic sleeve breaks and ends up in the bottom of the oil pan.
So yes it is loose in the hole per se but still can only come out through the bottom by taking the pump off IIRC, been a little while since I messed with mine.
So yes it is loose in the hole per se but still can only come out through the bottom by taking the pump off IIRC, been a little while since I messed with mine.
Thread Starter
Melting Slicks
Joined: Nov 2000
Posts: 2,738
Likes: 53
From: Bogart GA
Two shafts are fit together in a tongue and groove type coupling with a plastic sleeve to keep them from sliding apart. Sometimes the plastic sleeve breaks and ends up in the bottom of the oil pan.
So yes it is loose in the hole per se but still can only come out through the bottom by taking the pump off IIRC, been a little while since I messed with mine.
So yes it is loose in the hole per se but still can only come out through the bottom by taking the pump off IIRC, been a little while since I messed with mine.
Melting Slicks
Joined: Apr 2009
Posts: 2,632
Likes: 112
From: Great Plains Iowa
As the overhaul gaskets sets include those nylon sleeves your engine builder probably has several of them lying around.
Le Mans Master
Joined: Mar 2004
Posts: 7,493
Likes: 1,501
From: Little Rock AR
I have torn down a few 40 year old engines with the plastic sleeves. They are not brittle as you would expect They are rather tough and will not snap or break if you try to tear them up. Just sayin.
Instructor
Joined: May 2013
Posts: 136
Likes: 4
That's interesting. I was unable to pull the sleeve off the pump by hand to replace it with the new one. Fearing I would damage the shaft by prying it off, I burned it off with a soldering iron. Those sleeves are pretty tough!
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