Thread: A well used 80''called Klonk

Hi Steve, I feel your pain, so near yet so far and a bunch more dollars you were probably not planning on.


Could you please talk us through the re-build process when you get there, I will more than likely be going down the same path with our engine and need all the help I can get.




Erich

Hi Steve,
if you dont find another crank then have a look into metal spray repair for the journals. we did this a lot in Brissie so if you need contacts just let me know. might have some bits here if you get stuck (pistons etc).

Originally Posted by klonk

Well awhile ago I mentioned that the was light at the end of the tunnel for klonks rebuild, well theres been a rock fall in the tunnel.

I had had the engine running for about a half hour before I started the strip down and it seemed to run not to bad, so had planed to remove the sump to clean the inside, replace other seals, gaskets etc and give it a paint job to spruce it up and run it, then overhaul it later on.

Well the sump was removed and lots of crud was found.The end result is photo one . Thought while I was there I would check the crank bearing clearances. I used plastiguage for this and the big ends had 4 thou clearance, but inspecting the crank I noticed a strange mark around all the big end journals, it felt like a step in the surface. So using a micrometer to measure I found there was a step of 1.5 thou from side to side(photo 2) and they are 3 thou out of round., but not in the place of normal wear for a crank. Having worked grinding crankshafts for 3 years I new it was a dodggy crank grind from the past. So it just got worse from there. Cam and followers buggerd, the first piston I pulled had a broken top ring that had gone out the top of the piston, the other 3 had broken rings. Also needs valve guides as well.

So the crank is ground to 40 thou all round and the block is 20 thou over,which is good as its the original engine for the car but maybe need another crank. I dont think there are 50 or 60 thou bearings for the 1600 motors.

So im abit depressed at the moment, thats every part of this car Ive had to repair. Was really looking forward to getting it on its feet soon. Oh well!

Cheers Steve

Steve,

I'm due to pick up a '49 over Christmas that has a few spare engines in the tray. You're welcome to them if they're any use.

Only catch is you must come up for a BBQ to collect.

Cheers,

Andy.

P.S It's not THAT '49

Thanks Andy, might take you up on that. I need to wash things up yet and will try mates around town.

Cheers Steve

I bet finding that slug with the missing part if ring was a wow moment O.O
Do you have a photo of the bore it came out of? Just curious, can't imagine it looking pretty :/

Thanks komaterpillar

Havent got round to washing the block yet so just wiped out the bores. The marks arnt that wide but they are abit deeper than I would have liked .

The first photo is from no 4 cyl with the broken piston, the supprise one was no 3 cyl ,the mark down the bore was caused by the two broken ring pieces stuck in the ring groove of the piston (photo 2 and 3). When I pulled the piston out and saw the pieces I didnt think they would have caused any damage at all. I havent measured the bores yet. I will get our engine reconditioner to measure it with a cylinder guage to see what over size pistons are needed.

Photo 4 is the big end bearing, it breaks all the rules of engineering but was still working

Photo 5 an exaust cam follower, not ment to have the hollow in the middle.

NQseriesrover thanks for your offer will keep you in mind.

Cheers Steve

Looking at the cam follower, one has to wonder how often the engine had the oil changed. But on the other hand, later versions of that engine design (e.g. the six) featured roller cam followers - and there had to be a reason why the new 2.25 design had roller followers from the start.

John

Do you know whether these engines can be sleeved? I suppose if it wasn't for that number stamped on the side of the block, you would be looking for another engine.


Are all the cam followers the same or just 1 off?



Thanks a lot for the photos




Erich