Bran100's head

[BEEK]

received the head today, unpacked and torn down, began cleaning.

the first 2 pictures are of the head as received





then torn down, this head was 100% original, no one has been into it ever, still had oem seals and gaskets, hard as a rock



this was the first sign of trouble, when i pulled the water neck, there was no gasket left, and lots of corrosion



the combustion chamber with valves still in



and with valves out, note how clean the intake passages are, have to love efi!



valve seat details



note the coolant passage above the exhaust seat



head out of the cleaner, this is what i found, i media blasted it to get a better look



this is how it looked before, note it was completely filled with corrosion



this is after cleaning and some grinding to see what was left
the red arrow shows deep pitting
the yellow arrow shows the pitting growing to the edge of the head
the green area is how much margin is left between the cooling passage and the outside of the head
the blue area is how close the sealing ring for the combustion chamber is to the cooling passage



this is what it is supposed to look like

[BEEK]

does anyone have a head they want to sell him? its for a fuel injected car

[narfire]

I have a carb'd 2L head here but the shipping would be stupid...
Chris

[fiat218]

What happen? Does it just eat away the walls or Pitt it so bad that it can't be done?

[RRoller123]

Should we be using some anti-corrosion treatment in our cooling systems on these cars? Or do the modern coolants, "Prestone", etc have enough?

[fiat218]

Should we be using some anti-corrosion treatment in our cooling systems on these cars? Or do the modern coolants, "Prestone", etc have enough?

You are suppose to flush the system and add new,every 5 years or so,that's in any car

[So Cal Mark]

green coolant, ethylene glycol, should be flushed and replaced every two years. Electrolysis will eat away that ridge under the water tee and the coolant passages in the head

[RRoller123]

Thanks Mark, will follow that guideline for sure.

[bran100]

Thanks all, I've got a line on a couple of heads and can hopefully pick up where we left off shortly.

Brandon

[BEEK]

update!

cleaned the new head, all is good, there was a large amount of casting slag in the ports, very unusual for fiat, so i "cleaned "the ports a little extra

[seabeelt]

Nice looking head, and work!

[BEEK]

update:
intake port detail (note the 3 angle cut on the seat)



valves cut and hand lapped, you can see the sealing line on the valve to the right



valve springs installed






camshafts installed and valves adjusted (marks efi performance cams)



head ready for shipping

[bran100]

Getting excited for it!! Looking great!

Dropping off the block locally tomorrow for .40 over

[131lover]

Is the new head a 100s as well?
With the 43,5mm intake?

BEEK you are Awsome, very nice work..
Do you change the valveguides on many fiatheads when you grind the seats?
Alf

[BEEK]

i only change the guides when they are worn, usually only the brass ones wear. the cast guides for the most part dont wear. Every once in a while they do, and i will replace them