I have recieved a questionable head job, help.

[bc.]

I know everyone hates when they get bad head, but I paid allot for this and I guess I was expecting better from a pro.

Details:
-S14SR20det head to be mated to a 90mm darton sleeved mazworx block.
-New exhaust valve guides were needed
-Valves were grinded and a valve job was done
-Detonation had caused erosion of the 'squish' area on the exhaust side. This meant a small amount of grinding was needed to clear it out and then aluminum weld was beaded and grinded down before the decking was done.
-combustion chamber was 'rolled' ie: sharp edges removed because of the much larger bore being used
-valve height was measured and matched after the valve job, so shim order should be retained.

Problem:
-I see a pitted area on the edge of chamber #1. It looks like it might be from loose hot material during the welding process, not sure though. (see pictures)
-There are some 'dark spots' on the head surface where he said he used a scotch or something to 'smooth' a few places out. I am not really worried about these though, unless I hear otherwise. They do feel fine to the touch.

http://i279.photobucket.com/albums/kk158/btc1020/Project%20car/IMG_20130116_070205_zps6d7e3d5f.jpg

http://i279.photobucket.com/albums/kk158/btc1020/Project%20car/IMG_20130116_070243_zps7ec885d5.jpg

http://i279.photobucket.com/albums/kk158/btc1020/Project%20car/IMG_20130116_070303_zps4775c37f.jpg

http://i279.photobucket.com/albums/kk158/btc1020/Project%20car/IMG_20130116_070442_zps9b1ca7e2.jpg

http://i279.photobucket.com/albums/kk158/btc1020/Project%20car/IMG_20130116_070508_zps9d9a7ec5.jpg

If I could get some opinions on whether what I show might cause problems, I would appreciate it.

[booey13]

Hate to break it to you. It was a dude.

[KendallH]

Hey man any head is good head.

Unless they bite.

[jamg]

i can see that causing problems in the future, if you going to run your car on high boost, or just beat the fck out of it.

[1on1]

oh man, this should get a lot of views.

[bc.]

i can see that causing problems in the future, if you going to run your car on high boost, or just beat the fck out of it.
It will be used for drifting. planning on around 20psi thru a gt3071r and 9.0:1 CP pistons, looking at around 400whp. If I max out the turbo and still want more power, a different head setup might be needed anyway.

[jamg]

yeah, VVL, but that's way $$$. might as well go v8 or JZ at that point.

[bc.]

Yeah, I just want this to last a while.

I just picked it up from the shop yesterday but didn't see this spot when I picked it up.

[jamg]

i'm not sure how you would fix that. probably will have to replace the whole unit.

[bc.]

Same way they fixed the detonation, grind some of it away to get a clean spot to weld some aluminum back on, clean it up around the bore then deck the head again.

[ManoNegra]

I know everyone hates when they get bad head, but I paid allot for this and I guess I was expecting better from a pro.

If I could get some opinions on whether what I show might cause problems, I would appreciate it.

welding on cast aluminum would be my guess.
Impurities in the casting become pockets when heated up.

[drscooper]

welding on cast aluminum would be my guess.
Impurities in the casting become pockets when heated up.

this man.....

[ManoNegra]

Another thing, the radius on the combustion chamber appears too heavy to me.
I'd be worried about blown head gasket issues.

[bc.]

None of the rolling goes past 90mm of bore, if that is what you are talking about. I don't have my head gasket yet. Here is a pic of the spot with a vernier caliper at 90.00mm, I tried to center it best I could.
http://sphotos-b.xx.fbcdn.net/hphotos-ash3/150031_10151211762726845_488197974_n.jpg

http://sphotos-a.xx.fbcdn.net/hphotos-snc7/431389_10151211762751845_42400195_n.jpg

[iRONDONkey]

take it back to them, and see what they say.

[josephin510]

Find a cheap replacement.

[KOUKIboy]

Hahaha that tittle is kinda of misleading lmao

On another note, if the shop fucked up its their responsibility to make it right, take it back to them and have the issues fixed...

[snafupossum]

Go back to the dude, tell him from what you told your friends his head sucks and you want your money back.




...watch out for his pimp though.

[bc.]

Find a cheap replacement.

I got a valve job, new guides and other work done, I don't want to trash this head after all this $ was spent. I have a backup head if I need it, but it will likely need all the same shit done if not more. Any used head is probably gonna have 75% of the same work done.

I am bringing it up to the shop today when I pick up some parts he was cleaning for me. $50 is the most I will contribute to his shops failure. I mean, this was there before he decked the block, it has blue die in it, so he could have fixed it then.

[jr_ss]

None of the rolling goes past 90mm of bore, if that is what you are talking about. I don't have my head gasket yet. Here is a pic of the spot with a vernier caliper at 90.00mm, I tried to center it best I could.

The rolling is the issue, not how far it extends out. You're ultimately creating a wedge for combustion gases to force their way between the gasket and head.

The head is salvageable. A 90mm combustion chamber would remove the faulty welding done and remove most, if not sll of the of the ramp on the squish pad.

[Miguelone]

Was the head decked by hand using sandpaper or something? If not that looks terrible for a machined surface.

[ManoNegra]

Hahaha that tittle is kinda of misleading lmao

On another note, if the shop fucked up its their responsibility to make it right, take it back to them and have the issues fixed...

don't think the shop 'fucked' it up
if anything they should have warned about the possible issues that can arise from welding

The rolling is the issue, not how far it extends out. You're ultimately creating a wedge for combustion gases to force their way between the gasket and head.

this

The head is salvageable. A 90mm combustion chamber would remove the faulty welding done and remove most, if not sll of the of the ramp on the squish pad.

true but I don't think this is cheap nor practical for the intent of this build


op - you could just run the head as is and hope the gasket holds
the pits create detonation spots that can potentially get worse over time or not
it's a gamble really.

[bc.]

The rolling is the issue, not how far it extends out. You're ultimately creating a wedge for combustion gases to force their way between the gasket and head.

The head is salvageable. A 90mm combustion chamber would remove the faulty welding done and remove most, if not sll of the of the ramp on the squish pad.

Well since the squish area is already there, I guess I am not as concerned about this as you are. The gasket should already be holding back the force of combustion there.

Was the head decked by hand using sandpaper or something? If not that looks terrible for a machined surface.

Yeah... don't know what to say about this one. It feels fine but those spots where he said he rubbed it with something to 'smooth it out' concern me. If my block was just decked, why would it need smoothing, anywhere?? And there is a little scratch by my thumb that isn't from me.

don't think the shop 'fucked' it up
if anything they should have warned about the possible issues that can arise from welding

op - you could just run the head as is and hope the gasket holds
the pits create detonation spots that can potentially get worse over time or not
it's a gamble really.
I might just have to leave it like this. Mazworx will do their 90mm combustion chamber bore for $175 but I need to ship my spare head to them get whatever else done to it also. Or I could just send them this head... and wait longer.

I called the guy today and he told me if there was anything he though would be a problem, he would not have felt ok giving it back to me, whatever... I think he just missed it before he decked it and didn't want to go back and undo all his time by welding and redecking. I am taking it to him after work to see what he says.

[bc.]

Well, he said that given the location, it shouldn't be a problem for detonation and basically wasn't concerned about it. When my Cosworth 90mm gasket gets here I am going to make sure it isn't laying on top of the pitted area. I tested it out with an OEM SR20 gasket I had laying around and it basically clears it, so I don't think I will have a problem with the Cosworth.

[[email protected]]

I came in here expecting to read something else, disappointed. :(

[drift freaq]

I know everyone hates when they get bad head, but I paid allot for this and I guess I was expecting better from a pro.


LOL man you actually posted a good thread but your title choice and the opening sentence? :rofl: man they just kill. In fact its going to be my new sig.