How bad is it lol

[iitsMikE30]

I'm pretty sure this head is no good but thought I'd post these by the off chance it may be salvageable or if this is a common theme for the 885 heads.

grabbed a m20b25 for a song, Just wanted the head etc. for the head swap.






The water passages are deteriorating by the looks of it.

[e30davie]

It doesn't look pretty, just depends how deep the corrosion spots are and weather they can be removed with a skim.

And also depends if the head has been skimmed before. There are minimum head thicknesses in the Bentley manual, look it up and measure your head to compare. Then measure how much you reckon needs to be removed to get the head flat. You might be lucky, or you might not be.

[Northern]

That's way thicker than you could hope to machine off.

You'll be much better off finding another head. I assume it shouldn't be too hard to find one near you in ON.

[LowR3V'in]

There are machine marks on the head
if it goes deeper than those
it shouldn't be done.

They're shallow holes around the head
you'll see them.

[TobyB]

...that's pretty bad...

t

[iitsMikE30]

It doesn't look pretty, just depends how deep the corrosion spots are and weather they can be removed with a skim.

And also depends if the head has been skimmed before. There are minimum head thicknesses in the Bentley manual, look it up and measure your head to compare. Then measure how much you reckon needs to be removed to get the head flat. You might be lucky, or you might not be.

There are machine marks on the head
if it goes deeper than those
it shouldn't be done.

They're shallow holes around the head
you'll see them.

I've found the Bentley measurements for the head of machining, .3mm, but this is mentioned to keep a safe distance when matched to the proper block (I head to the 2.5 block or the ETA head to the 2.7 block). As my goal is to slap the 885 head on the 2.7 block, does anyone know how much can be skimmed off before compromising the head in anyway?
I'm guessing these circular indents are the machine depth markings you spoke of?

My understanding is that the 2.7 with 885 head has more room to spare as the compression ratio drops off ?

Feel free to correct me - if a new head is needed, so be it

[TobyB]

Wow- from that pic, I'd just start looking for a new head. That's a HUGE corrosion divot
in a critical sealing area...

t

[iitsMikE30]

Wow- from that pic, I'd just start looking for a new head. That's a HUGE corrosion divot
in a critical sealing area...

t

That's what I was thinking when i got the picture in comparison to the machining markings lol. starting to look for a new head or full m20b25 to drop in at the moment.

Appreciate the info

[Kershaw]

I'd never use it, but I also bet if you cleaned it up (acid washed it) and put it back together it would be fine for longer than you'd own the car.

[AndrewBird]

A bit of welding and a skim cut would fix it.