Showing posts with label motor mount. Show all posts
Showing posts with label motor mount. Show all posts

Thursday, July 3, 2008

Just a bit off

When I was working on the nose rack I noticed that it didn't line up with the motor like it had before. The nose rack is split down the middle so that the back shaft of the motor has room (the front shaft is the one with the flywheel attached in the back of ... never mind). I made some measurements and the motor is almost a quarter inch too far to the left.
Ugh.
I jacked it up, removed the mount and tried to realign it, but it's still off.
Disgusted, I removed the mount again and worked the bolt holes over with the rat tail file.

It took 4 attempts before I got it to line up right down the center.

Monday, May 26, 2008

Motor in!

Well, the Sunday before Memorial Day I rented an engine hoist and put the motor in the car all proper-like. The guy at the rental shop asked what I was working on ("Ford or Chevy?") and was a little surprised to hear what I was up to. He then said a friend of his has a converted Rabbit, but doesn't know much about it.
I thought I could do drop the motor in in about an hour and return the hoist in record time, but no such luck. The motor mount holes were off just enough to prevent the bolts from coming through. I ended up disassembling the motor mount and "adjusting" the holes a little bit with a rat tail file. NOW it fits!
I didn't take a lot of measurements or pictures before removing the engine. My theory is that the frame that connects the transmission to the differential will ensure the driveshaft and U-joints have the proper angle. If the motor is too low the rear suspension might wear a little funny, but the nothing should grind, howl or bind. If it is low I can shim it up with some washers. That my theory anyway.m

Tuesday, May 13, 2008

Motor mount is ready


Sorry for the bad picture...
While I was downtown I dropped into a hardware store and found some 7/8" fine thread 5" long grade 5 bolts. Not grade 8, but at this point, close enough.
Comes out the ones that came with the motor mounts were grade 5 too, but a little short at 4".
Drilled out the holes in the subframe, stuck in some 2" washers on the underside dropped on the rubber donuts (with their metal covers) and there you have it.
Now I'm ready to drop in the motor.

Sunday, May 11, 2008

Nothin's Easy


Saturday I set off to buy some nuts and bolts for the motor mount. I needed:
  • Seven 17 mm nuts and lock washers for the adapter plate

  • Two 1.5" 13mm bolts and stop nuts for the ring clamp

  • Two 5" 14mm bolts to connect the motor mount to the subframe

  • Plus I needed 3/8" hex drive and some locktight for the flywheel.

Seemed pretty easy. 2 days, 8 trips and 5 hardware stores later I still didn't have what I wanted, but I think I have enough to put it together.

First problem is finding metric anything. Sure you can find metric nuts and bolts, but the selection is pretty limited and aren't hard enough for my application - grade 5 is OK, but grade 8 is better. And 17 mm nuts could be found, but not at the right "pitch" - how close together the threads are. You can find 1.25 and 1.75 at Home Depot and Lowes, but I needed 1.50 which I finally found at an ACE Hardware.

So I went for SAE for the ring clamp bolts and the motor mount bolts. I couldn't find 5" grade 8 or grade 5 in 7/8 width, so made the dubious choice to buy 6" lengths, cut threads with a die and then cut them down to size. Comes out grade 8 is hard to cut (duh) and I didn't have a 7/8 die. Disgusted, I took a break to rethink the mounts. I was concerned that the lower rubber piece would extend down too far - cutting the ground clearance. Since my bolt idea isn't working and an electric motor doesn't create the vibrations that an ICE does, I decided to keep just the upper rubber piece and run the bolt directly through the subframe. This way, a 4" bolt will work which is what was shipped with the mounts.

So the ring clamp bolted up to the motor well after "adjusting" one of the bolt holes a bit to improve the alignment. The "torque bolt" idea was scratched as the bolt heads that stick through the holes I cut in the ring clamp and should keep the motor from spinning in the clamp.


The instructions for the adapter said to use a 3/8" hex drive to tighten the allen head bolts to 35 ft/lbs. I found a 3/8" hex drive at Kragen, but of course it didn't fit. I used an 8mm hex key to tighten the bolts by hand and so I traded in the 3/8" unit for an 8mm one - but it didn't fit either =\. I ground down the 8mm a bit and NOW it works.

The adapter is now on nice and tight and next is to make sure the flywheel is properly set to the "magic distance" - this is how far the flywheel is from the adapter plate so that the clutch operates correctly. The instructions say the flywheel needs to be 1.520" +/- .01" from the adapter. There is a hub that mounts on the motor shaft which the flywheel bolts to. This hub can be adjusted back and forth until the distance is correct. But the only way is to do this is to mount the flywheel, measure the distance, take the flywheel off and adjust the hub. With a 16 pound flywheel and the motor on a cart on the garage floor, this is a real pain in the back! Took me 5 tries, but it's now within tolerance.

So, we got the ring clamp on, the adapter on tight and the flywheel and clutch finally in place. I still have to drill the holes in the subframe for the motor mounts, but once that's done I can drop the motor in for real : )

Sunday, May 4, 2008

Weekend update

Did a couple of little things over the weekend:
  1. Busted the ring gear off of the flywheel. It's not needed since there is no starter, and removing it will save a little weight (surprising little, but better than nothing). People say the teeth of the ring gear creates turbulence as it spins, slowing the flywheel down, so, even if it doesn't save a lot of weight, removing it may help a little.
  2. Pulled the motor out. I stuck my head out of the garage and spotted an unsuspecting neighbor who was easily talked into risking flattening some of his body parts by helping me lift the motor out by hand (no winch, no cheery picker, just a nylon strap and two he-men).
  3. Did some adjusting and fitting of the engine mount. Cut the hole for the bolt head on the top of the ring clamp, added the rubber backing to the ring clamp and tried to assemble it with out much luck. The bolts are too short to bring the two halves of the clamp together and one of the bolt holes does not align. I still need to do a little cutting and welding for my "torque bolt" idea and now I have to "adjust" the bolt hole in the lower clamp and pick up some new longer bolts.

Saturday, April 26, 2008

Motor Mount - Part 2

I welded up the motor mount so that it's nice an solid. Next I had to drill a hole in it to accommodate those pesky bolts that run around the outside of the WarP motor. They look important, so I didn't try to remove them ; ). Of course the only place to put the motor mount is directly over a 4 of those pesky bolts. I put the motor mount in place, smeared some grease on the offending bolt head and lower the motor down to contact it. I then drilled a hole in the mount big enough for the bolt head.
Sounds easier than it was.
I then spray painted the finished mount black. I still need to drill the hole in the top part of the ring, but I was anxious to slap some paint on it.
I think the side bolt heads will fit between the ring clamp sides, but I may have to do some grinding.