Engine GA000099, An early GA engine rebuild thread |
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Engine GA000099, An early GA engine rebuild thread |
Superhawk996 |
Jun 4 2019, 06:08 PM
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#1
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914 Guru Group: Members Posts: 6,469 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch |
Last week I bought engine GA000099 from Freezing914 in the hopes of picking up some spare parts to support rebuild of the engine that came with my vehicle.
During the teardown of my vehicles engine, it is quickly becoming clear that the engine was abused by some DAPO. Cooling flaps and thermostat had been removed. Rust in the sump. The crank was scored and already 0.010" undersized. The oil pump was torn up. This is just the tip of the iceberg on the engine that came with my vehicle. (IMG:style_emoticons/default/chair.gif) 14 hours of driving seems to have netted me an engine that might be worthy of a rebuild. (IMG:style_emoticons/default/piratenanner.gif) This engine appears to be bone stock. D-jet mostly complete. As an added bonus I discovered upon teardown that none of the cooling tin fasteners have ever been disturbed. No screwdriver marks! But . . . like any engine of this age and unknown origin, it absolutely needs to be gone though. |
Superhawk996 |
Oct 9 2019, 06:27 PM
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#2
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914 Guru Group: Members Posts: 6,469 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch |
Have you ever noticed how one project leads to another side diversion?
As part of getting ready to rebuild GA000099, I've wanted to modify my vertical mill set up so that I can slow down the spindle to do cylinder honing and ultimately, I'd like to be able to cut my own valve seats down the road. My current slowest spindle speed is 135 RPM and that is just too fast for cutting valve seats. So I broke down and bought a Variable Frequency Drive (VFD) for my mill which operates on 220V 3 phase power. Previously I was using a static phase converter that creates 3 phase power from single phase 220VAC. The problem is that it only creates the 3rd phase for starting purposes. After starting, the 3rd phase drops out and then the mill is basically running on 2 phases. This works but it also de-rates the motor. For example my mill is 1 HP. But running on 2 phases it is only 2/3 HP at best not accounting for other inefficiencies. The VFD will get me back to rated horsepower and more importantly, it allows for variable speed control. It also has some other benefits like soft starts but those were secondary to getting the spindle slowed down. So after some rewiring of my garage and installation of proper conduit this time around to protect my mill wiring, I have the VFD wired up and operational. Still need to build a bracket to mount it to the mill or within close reach. Doh! Another project that doesn't involve the 914! (IMG:style_emoticons/default/confused24.gif) https://www.youtube.com/watch?v=cQ9_Aofg9aA |
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