Great thread Chad !👍👍👍
Now for the BAD stuff. I had to use a 5 lb hammer and lots of energy to remove the pistons. Chadbourn Bolles Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login
So what are the theories as to how this engine ended up like this? Blown head gasket leaking into the visibly affected cylinders? Had water entered through the intake (after the engine was abandoned) and found its way through poorly seated, or open, intake valves? The heavy rust looks mostly in a few combustion chambers. The lower end looks like lack of oil and over time the moisture won out. On my phone I don't see the cracked liners, but would have caused that to happen? Don't derail Chads thread, but I would like to hear the 'detective theories', or if the order of events to this failure are know, even better.
In the end it doesn't matter if the liners are cracked or not, all 12 liners plus Pistons must be replaced anyway. If you have a broken head gasket, the cylinder might get filled with coolant, if you then turn the engine over the liner might crack.
OK you have seen block with sleeves and pistons in, now block with nothing in it. Chadbourn Bolles Image Unavailable, Please Login Image Unavailable, Please Login
Yeah Raymond I agree, everything must be replaced, and hydrolocking could be a cause. If I read Chad's previous post correctly, multiple sleeves are cracked. Are they the cylinders, in which the combustion areas are showing rust, or are the others cracked as well? I'm curious about the head gasket leaking because if a section let go while the engine was running, wouldn't the affected cylinder's exhaust port show signs of the coolant having passed through? The ports look pretty consistent.
Wow, this engine is pretty ugly. I too would love to know the series of events which lead to this rusty mess. Also, I wonder how long the car sat unused before it was taken apart to reveal all of this damage? What car housed this engine? I assume it was a Countach but I'm curious as to the exact year/model of the car.
You have seen the nasty, now around 30 hours later. Chadbourn Bolles Image Unavailable, Please Login Image Unavailable, Please Login
That is just INCREDIBLE! Thanks for the Update Chad! I'm finding myself returning to this thread multiple times a day just to view how beautiful this restoration is.
Each stud, each gear, everything in the block was removed and cleaned or replaced. Each bearing, though some looked OK, even it had a hint of rust, was replaced. The 4th pic down, on left, is of the oil pump pressure regulator, notice the bit of trash on it. That I found when rebuilding the pump. Chadbourn Bolles Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login
Just a few pics showing what I have run into. 48 spring seats and everyone has to be cleaned. But why in the world did someone put silicone on them, what were they thinking? 48 valve tappets and as you can see there is rust in them. Every bit of this has to be done by hand and it takes hours to do that. like I said, I have around 30 hours in just the block work. Last pic is of one I did last year, the QV will end up looking like that, I will not quit till it does. Chadbourn Bolles Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login
That's a perfect job for walnut shell blasting. It will save your fingers and cut the hours down to minutes with zero damage.
Nice job Chad. What kind of shape was the top surface of the tappets in? BTW, any Harbor Freight will have walnut shell media...put away your nut cracker.
