The car was staring to use more oil then normal so I figured it's time for a rebuild. But then main reason was to get rid of the sodium filled exhaust valves that the 2 valve cars have. They are prone to breaking.
The coolant you see on the head was just a result of removing the head from the engine. The head gaskets did look like they were on there way out though.
The heads are getting all new stainless steel valves and guides from SIvalves.com. Great people to deal with. Talk to Lee if ever you need anything from them.
The cylinder liner's look almost perfect. So I'm still debating on whether to re-ring or just leave it alone.
I did a compression and leakdown before pulling the engine and the leak down was only 6% so I think the rings are fine. I also put varsol in the cylinders with the heads off to check for any leak down and nothing leaked past the rings.
I've heard several versions of "the story" about why the early 2V's used excessive oil, from rings installed upside down, to rings were just plain wrong for the application. It is documented however that Ferrari replaced some (as few as they could get away with) early 2V motors under warranty for excessive oil consumption.
I always use new rod bolts, even though they are not stretch bolts like Porsche uses.
If you decide to go with rings Perfect Circle makes what you need I believe.
Beauty..Thanks for the tips...Greatly appreaciated. It's funny but this is the fisrt 308 engine I've had apart!! I've done 355,348,and a head job on a TR but none on the 3x8 seires cars! I think you're right about them starting to need overhauls.
I agree with the previous posts, GREAT PICS and GREAT WORK. Thanks for sharing. I hope I have enough pics etc. to do the same for my Testarossa rebuild which is almost complete.
One question though, what did you use to get the aluminium so clean? I have been scrubbing away with a rotary wire brush and steel wool for days and days, thinking to myself there MUST be a safe chemical cleaner for aluminium, any advice?
When I rebuilt my BB engine last year, I cleaned the block with mag wheel cleaner...though I understand that NAPA has a product specifically designed for cleaning alu. When the block was finally cleaned, I lightly painted it with VHT high temp alu paint...
Steve U..Too get the aluminum clean I used engine degreaser to get the heavy stuff off,with a stiff bristel brush and a bunch of rags. After I used Super Clean to get in the nooks and crany's. I also power washed the entire engine while it was in the car before I removed it.
the 12 cylinder blocks will never look like the 308 blocks because they are cast different and the 308 blocks are of a different aluminum alloy. The 12's are sand cast and made with magnesium content leaving a somewhat rough outer appearance, while the 308 blocks are pressure cast aluminum leaving a smooth shiny outer appearance. That's why the 12's were painted from the factory & the 8's not.
The common V8 Stands are not adequate to hold a 12 until it is fully stripped down with the heads off. 12's are long and heavy and it's very risky to try and support that much wieght from the bell housing studs alone.
Thanks for all your advice guys, my engine is relatively clean, but has a few dark marks, like stains in the aluminium that I would like to remove.
David, I’ll give mag wheel cleaner a shot and if I’m lucky I’ll have a result as clean as yours. Tom, too late for me to power wash the engine, it’s already out and apart, but I will also check out Super Clean, can you tell me where it is available? I did an internet search and you can imagine how many things came up with super clean. JRV your point is taken on the differences in the casting and metals between the 3x8 and the 12’s, but I’d be happy with a block as clean as David’s.
For getting the 'open pore' aluminum clean on my 308 I used NAPA brand Aluminum Brightner, part number 765-1458. It consists of hydroflouric acid and sulfuric acid. It sizzles when it goes on and removes corrosion, oil and fuel stains. I use it last in the process of cleaning an engine before reassembly. Not recommended for polished aluminum. I use Mothers Mag Polish (cream).
when I started reading your excellent cleaning tips I was about to come back and ask you to post it in the Tech Archives for easy reference later....then I saw your other post below the first one...LOL....yes ..glad it's there!!
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