hi,ive just got this head back from a garage today and they have said they have tested and skimmed it and said it is ok to use but there are still marks on it,i don't really know what i'm looking at so i was wondering if anyone could tell me if they are ok to use with these marks on.cheers

 

Look fooked to me, can't see how the head gasket will get a good seal with those marks.

Anders

 

i wouldnt use that mate i would have give the guy at the garage it back cant see it lasting long or running great.

 

thanks for the info,as you can probably guess i haven't a clue about these so could you please explain the problem with them so i can argue my point when taking them back.cheers.

 

well i would say that you will lose compression through them cuts as they are quite deep, also as anders wr1 says it wont make a good seal so will probably just ruin the head gasket and you will have to do this all again

 

ok thanks for the info,these are v5 heads,i was only looking to sell them as i no longer have the car do you have any idea what there worth with this one damaged?this is not a cheap ploy trying to sell them without advertising i'm just looking for some idea of what there worth now.cheers.

 

well bud i personally wouldnt buy it but thats because i worry too much, im not sure but if i was you i wouldnt sell as it will only bite you if anything goes wrong with someones car due to damage,take it back bud and see what they say,

p.s just wait for the usuals to come on and have a go about you hinting about selling lol

 

i would only sell as spares/repair etc as i wouldn't want to rip anybody off,hence the reason for the post,i was just thinking the cams/other head maybe worth something.thanks for your reply's,i will be looking to get my money back for the test/ skimming if it wasn't worth doing.

 

someone used a pick axe on them ...........

 

i guess someone could use them for cams and valves, are they sti or wrx? becuase if there are wrx the hydraulic lifters are realy hard to get hold of i was looking for weeks for mine even r n golden subaru couldnt get hold of them lol so if someones in need i gave £30 for a set of siezed ones as i know how to free them off, just need to keep an eye out in the wanted threads or ebay them hope that helps

 

Only good as a paperweight!!!

 

they are v5-v6 sti which i'm told are sought after but obviously in usable condition!maybe i will just use them as a paper weight.lol.

 

If the valves and seats have been sorted, it is useable, but it has seen better days...the damage around the valve seats are the issue more so the than the rest of combustion chamber area (Yes it looks bad, but it'll get covered with carbon anyway, so doesn't really matter unless your trying to build a blueprint engine ).

I could be wrong but it looks like the valves are either second hand or not been replaced...they should be (as they often get bent), unless they've already been removed checked and reground (along with the valve seats...although it doesn't look like it).

Anyway, why throw money at this head when you can put that money towards a new head?

It still has a value, but only for someone who wants to build an engine on the cheap and not looking for pushing the limits of BHP.

 

There's no way in earth I'd use that head on any build.

 

+1

 

Is all that damaged not confined to within the cylinder bore though meaning the head gasket wouldn't even seat where the damage is?

 

HG mating areas look clean/undamaged

 

Looks to me like a certain cylinder had something dancing around inbetween the piston and head.

 

you'd actualy consider using that? please tell me your not serious.

 

I can't see that every being used again. How the hell did it get that damaged?

 

det maybe?

 

Looks like a piston ring failure, i would never use that head on any build. As said above all it's good for is spares or a large paperweight.

 

Foreign debris damage, usually a broken piston ring or similar ratting around, as mentioned above.

All it is a few dents; could machine them out and open up the combustion chamber a bit, but what you do to that chamber you'd have to do to the other three to get matching compression - why bother, unless you have LOTs of time on the you hand to faff around with the drill for hours on end.

The valve seatings is the important part (as usually debris gets trapped between the valve and seat; and you can't see that without removeing the valves.

 

With damage like that in the combustion chamber you may get hot spots forming, which will melt the head or piston then you are back to where you started.

 

just to add, who ever the garage is get your car away from them as soon as possible if there gonna reuse stuff like that

 

Doubtful; once its coating in carbon (which all combustion chambers do eventually) it be no worse than a normal head.

Still wouldn't use it for anything above stock BHP, but that me being picky

 

IMHO - It will make a good door stop.
Each one of the jagged edges in the combustion chamber is a potential trigger for causing pre-ignition/detonation - personally i wouldnt use it especially on an STi.

Mick

 

The power and knowledge of Merlin
Evening Mick

 

am you looking at the same pictures mate???

it looks like they have used a screwdriver to part the head from the block then used chisel to remove the carbon and stuck on gasket