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01-06-2017, 05:22 AM | #21 |
Junior Member
Join Date: Dec 2016
Location: NE Brazil
Posts: 24
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Re: Don"t touch that bolt
As for the pump "passion". (And maybe I'm pulling a night-crawler out of this can of worms) But what is the purpose of spring loading the pump gear in the valve cavity? I wondered if for some reason they wanted to pump to "float" between two springs. Is it just a way to hold it instead of a bolt? Seems an expensive and complicated way. I thought it might be pressure relief, but it can't rise because of the distributor shaft.
The pressure relief by pump spring seems like a valid explanation - and maybe it was intended that way - but it looks to me like to shoulder is longer than either the pin or the slot. I would think that before you got relief either the pin would disengage allowing the body to spin or the slot would disengage and it would stop spinning. |
01-06-2017, 09:05 AM | #22 |
Senior Member
Join Date: Jul 2010
Location: upstate NY near Mass border
Posts: 789
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Re: Don"t touch that bolt
I like the tool or jig that "foreverfour" posted but what is the spring for on the retaining bolt? Jack
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01-06-2017, 09:52 AM | #23 |
Senior Member
Join Date: May 2010
Location: Mpls, MN
Posts: 27,582
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Re: Don"t touch that bolt
About 10 years ago I bought an engine from a club member. On the way home I stopped at a friend's house to show him the engine, but when I tilted the engine to the side I heard some clunking in the bottom end. I knew then that I most likely bought another boat anchor. When I got home and removed the oil pan I found the oil pump got tangled up with the crankshaft and a lot of damage was done to the rods, tappets, oil pump, and even the cam.
I should have paid more attention as I removed the pan, because as I think about it, how can the pump go anywhere if the dipper tray is in place? I have the engine tucked away in a large blue plastic tub, but when I do some garage cleaning this summer, I'll look it over again. Sure seems like the dip tray must have been missing for the pump to tangle with the crankshaft. |
01-06-2017, 11:53 AM | #24 |
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Join Date: Apr 2016
Location: Bellingham, WA
Posts: 1,163
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Re: Don"t touch that bolt
Actually, I stole the pic from Snyder's web site.
http://www.snydersantiqueauto.com/oil-pump-and-pan They must realize that judges of high point cars rarely make you take the pan off
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01-06-2017, 01:39 PM | #25 |
Senior Member
Join Date: May 2010
Location: Ontario, CA
Posts: 187
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Re: Don"t touch that bolt
Edit: Found it at Bratton's. Thanks.
Can I purchase a tool like this? I need to reinstall my pump and pan but the engine is still in the car. Last edited by COOTER; 01-06-2017 at 03:03 PM. |
01-06-2017, 02:50 PM | #26 |
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Join Date: May 2010
Location: Central, IL
Posts: 3,968
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Re: Don"t touch that bolt
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01-06-2017, 03:14 PM | #27 | |
Senior Member
Join Date: May 2010
Location: Fresno, Ca.
Posts: 3,636
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Re: Don"t touch that bolt
Quote:
stout dude! With out mocking it up,..to know the "installed height" and the spring rate(with a spring checker), I could see it being in the 100-150 pound range..? Dudley |
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01-07-2017, 02:16 PM | #28 |
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Join Date: Nov 2010
Location: Anchorage, Alaska
Posts: 9,115
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Re: Don"t touch that bolt
This is what Snyder's is currently offering:
http://www.snydersantiqueauto.com/oil-pump-retainer
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01-07-2017, 02:28 PM | #29 |
Senior Member
Join Date: May 2010
Location: San Antonio, Texas
Posts: 160
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Re: Don"t touch that bolt
Every time I have had to drop an oil pan with the engine in the car (not really a lot, but more than a few) the oil pump has stayed in place. Just lucky, I guess. I never had to address the 'Don't-touch-that' screw.
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01-09-2017, 12:57 PM | #30 | |
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Join Date: May 2010
Location: Fresno, Ca.
Posts: 3,636
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Re: Don"t touch that bolt
Quote:
some kind of pressure relief. So I went and did the math and this is what I came up with.. 1. Spring rate, upper spring,.....28# per inch..used spring.. 2. Installed height of spring,...2.980" 3. Installed spring pressure,...23#.. 4. Height of "ledge" on the driven / drive gear housing,...165" 5. Should pop-off @ about,...25# Dudley |
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01-09-2017, 03:39 PM | #31 |
Senior Member
Join Date: May 2010
Location: Oregon
Posts: 1,374
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Re: Don"t touch that bolt
The oil pump and distributer drive gears are both driven by the worm gear on the camshaft. I am no engineer but it seems to me that Ford designed this to be an integrated assembly that floats so as to minimize wear and prevent any binding that might occur with the various thrust forces that come into play on cold starts and acceleration/ deceleration. Ford also incorporated some give in the distributor drive shaft itself by making it in two pieces instead of one. In addition, the camshaft has its lateral thrust floated under pressure from another spring at the front end. That spring at the bottom of the oil pump is part of a system. I don't think it is relieving much oil pressure in a non-pressurized system but it is helping to relieve stress on the whole assembly. Note that most of the wear on the camshaft bearings is on the middle section where there is a lot of stress going on.
I have disassembled some A and B engines that had severe wear on the camshaft center drive gear teeth, to the point where the gear edges were as sharp as a knife. In each case, somebody had used a bolt to pin the oil pump in a position where it could not move up or down at all. Any thoughts? |
01-09-2017, 05:31 PM | #32 | |
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Location: Fresno, Ca.
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Re: Don"t touch that bolt
Quote:
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