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SpriteSpot.com • View topic - Starting the restoration

Starting the restoration

This forum is for topics and questions specifically related to the Mk III/Mk II variants.

Re: Starting the restoration

Postby Brian Moffet » Fri Dec 28, 2012 8:34 pm

You can see the ring of rust at the top of the bore, which is what has me concerned. Gerard will take a look at it with his more experienced eye. The piston bearings feel like they are ridged, but the crankshaft looks good. So it looks like some more work will have to be done on the engine.

Checked the crankshaft and you can feel some ridges on it. So it will come out and we'll get everything properly set up again. Means that we'll be starting from new honing, new rings, new bearings, maybe the same pistons.

Brian
My running Sprite restoration page: http://brianssprite.blogspot.com/
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Re: Starting the restoration

Postby Brian Moffet » Mon Dec 31, 2012 8:37 pm

The engine has been pretty much completely disassembled now. The crankshaft was removed after determining that the clearance at the crankshaft thrust washer was 0.003 on the front and 0.0025 on the back. 30+ years old gasket seal is interesting stuff....



And the camshaft, carefully wrapped up in a towel to prevent damage... Couldn't get the timing gear bolt off, so pulled the entire thing out.

My running Sprite restoration page: http://brianssprite.blogspot.com/
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Re: Starting the restoration

Postby Brian Moffet » Sun Feb 10, 2013 8:06 pm

Crankshaft has to be ground down to 0.020 from the current 0.010 under. The grooves are too deep to polish out. I'll find out soon about the bore.
My running Sprite restoration page: http://brianssprite.blogspot.com/
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Re: Starting the restoration

Postby hoggie » Mon Feb 11, 2013 9:28 pm

Looking at your restoration pics, I was amazed that the piston sides did not show any scouring. Probably could reuse with new rings if you can clean up the bore and stay within specs. I had to bore out to .040 with new pistons to restore my 69. I think I had over 100k on the engine. Just too much wear. Do you know how many mile you have on the engine?
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Re: Starting the restoration

Postby Brian Moffet » Tue Feb 12, 2013 2:03 am

I suspect somewhere around 5000, but I'm not completely sure of that. There is quite a bit of rust at the top, and these are actually stock pistons (not over-sized). The machinist will take measurements and see what the bore is up and down. Biggest problem has been it sitting for so long.

We'll see. I have a lot of leeway if I do need to go larger which is nice.

I do have to remind myself, there really isn't a whole lot of difference of 10 thousandths of an inch! :-)

Brian
My running Sprite restoration page: http://brianssprite.blogspot.com/
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Re: Starting the restoration

Postby hoggie » Tue Feb 12, 2013 8:21 am

Yeah, that rust is a killer on these cars. Engine and body.

Good luck on the restoration.
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Re: Starting the restoration

Postby Brian Moffet » Tue Feb 26, 2013 12:11 pm

Yup. Need to move to 0.030 over pistons. The current ones are original stock, but the cylinders have to be bored out.

So, new pistons, rings, bearings, etc, etc, etc...

It'll be a new engine when I get done with it. :-) The cost of having an engine sit, even in a dry place, for 30 years.
My running Sprite restoration page: http://brianssprite.blogspot.com/
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Re: Starting the restoration

Postby Brian Moffet » Sun Apr 07, 2013 7:32 pm

Been a while since I posted. Engine is at the machinist getting bored to .030 over, Gerard is rebuilding the transmission, and I am cleaning, sanding and priming the engine compartment. The battery box will be replaced before I paint it, but the next stage will be the transmission tunnel, then the frame in front of the tunnel, and the forward.

You can't see it very well, but the right side shows some serious damage from a previous accident. I also found number stamped on the right side wheel-well, so I wonder if that is a replacement.

I'm thinking a light gray engine compartment might be nice :D

My running Sprite restoration page: http://brianssprite.blogspot.com/
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Re: Starting the restoration

Postby Brian Moffet » Fri May 10, 2013 3:59 pm

More motion on the Sprite. I took some time off and spent it removing all of the front suspension, steering rack, and everything else in the front end and engine compartment. I now have a box full of suspension parts I can work on off the car:


I can also now get to the entire front end to clean up and paint it. (primer at the moment). That will be coming up next.



Removing the left tie-rod was arduous, I don't believe any of this have been removed from the car since it was built.
My running Sprite restoration page: http://brianssprite.blogspot.com/
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Re: Starting the restoration

Postby Brian Moffet » Sun May 26, 2013 6:10 pm

Primer is taking over the engine compartment...

In case it's not obvious, I'm cleaning, sanding and primering a section at a time. Once the engine compartment is completely done, then I'll clean up the bits of mess, and do a final paint.



My running Sprite restoration page: http://brianssprite.blogspot.com/
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Re: Starting the restoration

Postby Joe Schlosser » Wed May 29, 2013 10:46 am

Brian
Always good to be remove the fender to see what the outside foot well looks like. All sorts of stuff can get trapped in the space between th efender and the side panel. I would recommend trying to save the tab on the fender. Easire than trying to fab a new one and weld it on. Give a smalle grinder atry (dremmel) to remove as much weld as possible and then use a chissel on the seam. Depending on how much heat was used during the welding , with any luck it should separate.
Good luck.
Joe
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Re: Starting the restoration

Postby Brian Moffet » Wed May 29, 2013 11:08 am

I was able to get the fenders off, the outside foot well looks good. I did find a 3/8-1/2 inch open-ended spanner in there :-)
My running Sprite restoration page: http://brianssprite.blogspot.com/
Photos from my Sprite Restoration: http://www.pbase.com/moffetb/sprite_mk_iii
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Re: Starting the restoration

Postby Brian Moffet » Thu May 30, 2013 1:17 pm

Transmission completed by Gerard. It's a combination of original and 1974 parts, which all came from my Sprite. Gotta love the oddities you find in these things :-)


Image
My running Sprite restoration page: http://brianssprite.blogspot.com/
Photos from my Sprite Restoration: http://www.pbase.com/moffetb/sprite_mk_iii
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Re: Starting the restoration

Postby hoggie » Thu May 30, 2013 7:54 pm

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Re: Starting the restoration

Postby Brian Moffet » Sat Jul 13, 2013 7:42 pm

Before

Image


After

Image

You can see a weld where it looks like the door sill was replaced or something. The pile of dirt and junk on the floor after doing this clean up was about 1.5 feet in diameter and 2 inches deep. There doesn't seem to be any rust in the corner, even though I did remove a fair amount of dirt etc...
My running Sprite restoration page: http://brianssprite.blogspot.com/
Photos from my Sprite Restoration: http://www.pbase.com/moffetb/sprite_mk_iii
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