I finally split my 1.7 case, pics added |
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I finally split my 1.7 case, pics added |
rwilner |
May 29 2012, 08:49 AM
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#1
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No Ghosts in the Machine Group: Members Posts: 953 Joined: 30-March 10 From: Boston, MA Member No.: 11,530 Region Association: North East States |
I was told this engine came from a 1.7 that was in a 914. I'm tearing it down to rebuild into a 2056.
First, I found an M12 or M14 triple square bolt with a spring under it. This bolt is located between two pushrod tubes. I'm guessing this is the oil pressure relief since I didn't find the giant slotted plug I was expecting to find...true? Second, there is no windage tray. Did the early motors not have a windage tray? Should I source one and install it? I don't see anyplace in the casting that would receive the tray... Third, I didn't find the serial number where I expected it to be -- in front of the breather tower. Where else could it be? It seems like a low mile case to me...lifters and cam bearings show minimal wear, the cam looks to even be reusable to my untrained eye. If I had to guess i'd say this was a low-mile motor that got parked due to FI problems or something. have no pics but will post some tonight. |
McMark |
May 29 2012, 09:45 AM
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#2
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
The triple square bolt is the second oil pressure relief. The first one is on the bottom of the engine, under the oil filter mount. Some later cases don't have the second valve, but all have the first one. Buy a drag link socket for the screw driver head on the first one. And use a 3/8" extension (no socket, just the extention) on the triple square head of the second one.
(IMG:http://www.914world.com/bbs2/uploads_offsite/www.practicalmachinist.com-419-1338306306.1.jpg) Not all engines had the windage tray. I've never heard a definitive reason for why they were put in or not. And it's been debated as to if they should be put back in. They can help control windage (s the name implies) but it's also been speculated that they might impede oil flow back into the sump. The pushrod tubes dump their oil on top of the tray, and the oil must make it's way back down to the sump. This also deposits oil near the spinning crank, which is how windage happens. One modification used in the past is to drill holes in the tray just underneath the semi-rectangular openings on the bottom of the lifter bores. This is where the oil returns from the head, and by opening up these areas you can accelerate flow back into the sump. Here's a picture - these openings are from a very early engine and aren't located where I would put them now. Serial numbers for non 914-2.0 engines are near the flywheel on a 45-degree flat section. |
rwilner |
May 29 2012, 11:54 AM
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#3
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No Ghosts in the Machine Group: Members Posts: 953 Joined: 30-March 10 From: Boston, MA Member No.: 11,530 Region Association: North East States |
Thanks mark...never even heard of a drag link socket before.
Off to sears! |
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