The first week of the new year has seen a flurry of activity. The Wall in the garage is finished and 2 extra sockets are installed and wired up.
There's also been more progress on the old David Brown, albeit, not all of it positive.
Since the last report I continued by taking the sump off for a good look from underneath, not so good, rust in the bores under the pistons as well. A quick scrape with a screw driver and a polish with 800 wet and dry cleans the rust off OK and leaves the bores looking pretty good. Typically one can't get to the bores under the piston.
Next step was filling the pistons with penetrating oil. This didn't help much and only found it's way past No.2 the other 2 remaining dry underneath.
This evening I plugged in the engine heater and, to my pleasant surprise, this works a treat and heated the block up so that you could hardly touch it. Still no joy.
Facing the inevitable, I have removed all three bearing caps with the intention of pushing each piston out on it's own. All shells and the crankshaft are in good condition so, hopefully these will be re-usable.
Working from underneath with a block of wood and a large hammer I have managed to remove no 2 piston, Good... No.1 and No.3 are still stuck solid so I still havn't been able to rotate the crank even the tinyest amount, bad.... With a little careful persausion I managed to free up 2 of the 4 rings on NO.2, these look to be OK, with a little more persuasion, I managed to break the third ring on No.2, Bugger...
So the list of parts required now looks like this.
1: Head Gasket Set
2: New Rings
3: Sump Gasket
4: Clutch
Understandably my financial controller has reservations about my using large amounts of cash on this project. I wil be trying to avoid adding too much more to that list.... More pictures at the next report.
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2 comments:
Is there some way of hitting it from above? Surely working from underneath you're working against gravity. And my suggestion of heat was a little more direct - a blow torch directed down the bore - or would that just warp everything to hell? How about twisting the cylinders in the bores? If you've removed the crankshaft is this possible somehow? give me a place to stand and I can move the world!
Hmm, I think paitence is better than a blow torch in this occasion.....
Boiling diesel/penetrating oil straight on top of the pistons is an option though.
Didn't want to have to remove pistons, definately don't want to remove crank! Can't bang downwards as long as there's 2 pistons stuck as the crank is stopping them from going down.
The good news is that on the proviso that I've got all three pistons out and the crank turns, phase one of the budget is approved, that whould get me as far as getting the engine to fire......
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