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oil pressure problem solved


 
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Skip Burney
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Joined: 25 Oct 2016
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PostPosted: Sun Sep 08, 2019 7:12 pm    Post subject: oil pressure problem solved Reply to specific post Reply with quote

Well I built a brand new engine and it would crank up with 70 lbs and as it warmed up it would slowly start to drop. I would watch it over a period of an hour it would be down to 20. I couldn't stand that it did that when it hit 20 I would shut it off and leave it alone. Everyone said be happy with 20 lbs but I knew something wasn't right. The new engine had a new oil pump .010/.010 crank and new bearings, sleeves, pistons and rings plus I had the head reworked. So I finally pulled the front cover off and found that the shop who vatted the block had taken out the small oil gallery plug and didnt put it back. This meant that only the backside of the front cover was holding back 70 lbs of oil pressure and when I looked at the gasket it was blown out and leaking high pressure oil back to the pan. See photos. Now does anyone know where I can get the small plug for the oil gallery if not I can machine a small brass plug freeze it and tap it into the hole.



 
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ptfarmer
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PostPosted: Sun Sep 08, 2019 10:17 pm    Post subject: Re: oil pressure problem solved Reply to specific post Reply with quote

731356M1 Plug (11/16" Cup Type) (Perkins No. 0650566). Glad you found the problem!
 
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ASEguy
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PostPosted: Mon Sep 09, 2019 3:08 am    Post subject: Re: oil pressure problem solved Reply to specific post Reply with quote

Good job sticking with it until you found the problem. I didn't see your original post. I had a student years ago with a similar issue. He swore he used plastic gage on all the mains and rods and had a new oil pump. The only difference was his would drop to almost zero. It turned out the machine shop gave him back all the oil galley plugs but one in the front of the block behind the timing gear. I never saw it when I checked it for mechanical time due to the gear being on the cam.
 
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rustred
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PostPosted: Wed Sep 11, 2019 4:20 pm    Post subject: Re: oil pressure problem solved Reply to specific post Reply with quote

your right. but your using the wrong gasket stuff by the looks of that gasket. with Permatex high tack sealer you would have been able to reuse that gasket. its sticky and holds gaskets in place and very easy to remove parts with out wreaking a gasket.
 
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