885 Cylinder head 0_o

[Bmwb]

so i finally go my cylinder head apart so i can send it to the machine shop , but i found something weird 0_o here are some pics , is this even safe to put back and use or should i got find a new one...

[dougie30]

Looks like it may have cracked and some one welded it?

[IronFreak]

Do you have a picture of the underside? If it was welded but done right, you're probably ok. I'd have it pressure checked by a machine shop, they can tell you hoe it looks. Guys have their coolant jackets welded on these for boost, if its done properly it shouldn't hurt a thing.

[Bmwb]

i have no clue , but am i able to reuse it again , one of the valve tip is smushed or some shit aswell 0_o . so im gonna need to replace that , but with that there i think it was fine i guess because the person that had this engine , was running it with no problems but i think that the valve that is messed needs to be replaced is why he took out the engine and didnt know what happned to it

[IronFreak]

.....the only thing I would be concerned about after looking at the pictures again, is it looks like it creeped into one of your bearing journals.

[Bmwb]

thats what i noticed , but like i said it was running like that for a while is what im guessing , because it was being used , the only problem iv found is that one of the valves needs to be replace


here the back \

[IronFreak]

Don't know what to tell ya buddy, I'll let some guys with more knowledge chime in on this one.

[jlevie]

Have you tried a scraper on the mess? I've never seen anything like that, but it could be some sort of contamination. A long distance diagnosis is just about impossible, but you should be able to trust the opinion of your machine shop.

[Bmwb]

that's some weird ass shit , but also got some pics of the smashed valve tip pretty weird , anyone know how to get this off without a compressor , I don't have one atm , and I tried pushing against it its pretty damn solid

[digger]

welding there is a temporary fix its just gonna crack again where the weld ends in time. Aluminum is shocking in fatigue cracking situations and welding is one of the worst process for fatigue. If the location was not critical it would be ok but the location is in an area that is prone to cracking due to stresses....you could risk it but there seems to be a plentiful supply of uncracked heads in north america and if you are doing a rebuilt why risk it

[acolella76]

blast it with piss

[Bmwb]

well , ill talk to the machine shop and see what they have to say about it . this engine is basically my backup so rebuilding it is the way to go for me, plus when i started at it and trying to scrape it , i can say that its pretty solid , nothing would happen ,

[TobyB]

I've seen lots of aluminum welding, and done a bit myself.

That doesn't look like any welding I've seen. It's not MIG or TIG-

maybe supersonic aluminum projectile bb's?

Find another clean head. The couple hundred will be worth it in reduced headaches
when the bb's pop off....

t

[bastianshaw]

I really want to know what that is

[CarsSuck]

I'm just kind of curious, that isn't one of those Spanish aftermarket heads, it it? Does it have BMW casting marks?