Engine Rebuild 1974 Z1A

DogsbolloxofZ1B · #1 PostAuthor: **DogsbolloxofZ1B** » Sun Nov 27, 2011 9:53 pm

This may take a while :lol:

This is the engine from a '74 Z1A that was a barn find and has sat for 15yrs. Its only done 7000 miles and is documented :shock:

As you can see from the images water has got into one of the bores and the others aren't fantastic. Yep the engine is seized too.
The head needs new guides and probably 4 seats. I'll get this sucker apart next weekend share a few more images and then its off for vapour clean.
I hate dirty engines :evil:

Ohh and a plug has sheared-off too. :evil:

Mike

Crofty · #2 PostAuthor: **Crofty** » Sun Nov 27, 2011 10:24 pm

You have your work cut out there, though these engines are remarkable and I am sure you will be able to get it back to good order. Keep at it. Crofty

marve114 · #3 PostAuthor: **marve114** » Sun Nov 27, 2011 10:46 pm

Dam you do pick em !!!!!!
Ive heard something aboke coke being good to help un seize clean up stuff ?????

rpeters · #4 PostAuthor: **rpeters** » Mon Nov 28, 2011 7:56 am

looks a bit crusty, good luck with the refurb....

PJ · #5 PostAuthor: PJ » Mon Nov 28, 2011 9:07 am

Are you sure it was a barn??

Crofty · #6 PostAuthor: **Crofty** » Mon Nov 28, 2011 9:23 am

PJ, it was this one

pertonpc · #7 PostAuthor: **pertonpc** » Mon Nov 28, 2011 2:21 pm

Much respect to you for taking that one on. Will be great to see what develops. Good Luck :wink:

From Mark

PJ · #8 PostAuthor: PJ » Mon Nov 28, 2011 2:50 pm

Crofty wrote:PJ, it was this one

bedlow1 · #9 PostAuthor: **bedlow1** » Mon Nov 28, 2011 5:46 pm

Your a glutton for punishment heres a pic the rest of the Z1A when we collected it . PS that engine leaked thick black oil in my lovely carpeted new van

sid123 · #10 PostAuthor: **sid123** » Mon Nov 28, 2011 6:02 pm

To get rid of the carbon on the head soak it in nitromores paint stipper for several days, it will soften it so you can then easily remove it. Also works on oil discolouration in crank cases etc. ( just keep away from rubber bits such as camchain idlers

SID :evil:

bedlow1 · #11 PostAuthor: **bedlow1** » Mon Nov 28, 2011 7:37 pm

heres a pic of the restored one we delivered back to the grateful owner

It will be added to his collection of minters which dogs has restored

DogsbolloxofZ1B · #12 PostAuthor: **DogsbolloxofZ1B** » Sat Dec 03, 2011 8:26 pm

Well the barrels are off now, took me all day:evil:
As you can see in the close-up of the seized piston I drilled a series of 6mm holes just inside the ID of the rings, then used a deep hole cutter to cut the piston away all the way down to the gudgeon pin, a couple of taps around the edge to break a section of ring & piston away then all the pressure is relieved and out she comes..

NOw to get those cylinder head studs out.. Got another special tool for those from SnapOn..

Z1parR · #13 PostAuthor: **Z1parR** » Sat Dec 03, 2011 8:31 pm

Good job Mike well done , keep the pics coming :up

Pigford · #14 PostAuthor: **Pigford** » Sun Dec 04, 2011 9:01 am

Excellent (you're a brave man) - can't wait to see the special Snap-on "Stud removal tool" in action :twisted:

nanno · #15 PostAuthor: **nanno** » Sun Dec 04, 2011 11:43 am

Wow, nice find.

Best of luck with the studs. If possible I would put it in an oven and heat the cases up to about 100 - 150Â°C and then and then shock the studs with some icing-spray from a pharmacy. Do that 2-3 times and they should come out easily.

Engine Rebuild 1974 Z1A

Engine Rebuild 1974 Z1A

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