 Thick oil pump gasket, Pump doesn’t line up |
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| Chad911sc |
 Jan 17 2026, 10:26 AM
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#1
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Member  Group: Members Posts: 251 Joined: 24-September 24 From: Florida Member No.: 28,374 Region Association: South East States  |
So my plan was to start assembling the 2056 today, but I found this when placing the oil pump into the case. I measured the gap needed to fill with a gasket, and it’s right at 3mm. Do they make a thick pump to case gasket that will fill this space, so that the rubber sealing ring will be in the case instead of hanging out the back of it??
The gaskets that came with the pump are way to thin to place the pump in the correct position. Attached thumbnail(s)   
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| fixer34 |
Jan 17 2026, 02:30 PM
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#2
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Senior Member Group: Members Posts: 1,380 Joined: 16-September 14 From: Chicago area Member No.: 17,908 Region Association: Upper MidWest 
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I don't think you should need a 3mm thick gasket, the paper style is normal.
Either the pump is machined incorrectly or the mounting surface was milled way too much. Hoping it just a bad pump... |
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| Geezer914 |
Jan 17 2026, 02:40 PM
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#3
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Geezer914 Group: Members Posts: 2,191 Joined: 18-March 09 From: Salem, NJ Member No.: 10,179 Region Association: North East States
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Check the clearance to the cam gear with the cam installed.
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| Montreal914 |
Jan 17 2026, 03:03 PM
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#4
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Advanced Member Group: Members Posts: 2,009 Joined: 8-August 10 From: Claremont, CA Member No.: 12,023 Region Association: Southern California
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That groove tawards the inside doesn't look like an O-ring groove, if this is what you are thinking about. (IMG:style_emoticons/default/confused24.gif)
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| Ninja |
Jan 17 2026, 04:59 PM
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#5
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Member Group: Members Posts: 72 Joined: 25-September 25 From: Granbury Texas Member No.: 29,004 Region Association: Southwest Region |
I'd check the line up of the oil pump ports to case too.
Might add clarity as to proper depth. I'd prefer the holes in the pump line up perfectly with the holes in the cases. |
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| Chad911sc |
Jan 17 2026, 05:26 PM
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#6
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Member Group: Members Posts: 251 Joined: 24-September 24 From: Florida Member No.: 28,374 Region Association: South East States |
So the pump body is definitely too long. It’s just shy of 2mm longer than the previous pump that came out of the running motor. I have sent pictures and explanation to the company I bought it from. The boss on the back of the pump where the gear engages the cam gear is also a hair longer as well. It bottoms out against the cam as you can see in the first pic.
Attached thumbnail(s)     
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