I did some work for a friend, so he gave me a complete b16 head with a 98+ CTR intake cam, ITR intake valves, full ITR valve springs and ITR LMA's. Ive already tore the head down to resurface/hottank/fix this issue.


This is on the #2 cylinder, from what I can tell the valve seats were not effected. It was due to a idiot running the setup boosted and untuned and blowing a hole in 2 CP low comp pistons, with this particular cylinder having the piece of the piston floating around for a second or two. Damaged no valves.


I plan to use this head for a LS block I have in the near future, so I want to know what NEEDS to be done on this damage, or if its fixable. I thought it was fixable but im not sure what process it needs to go through to fix it all, i was thinking deburr/polish all of the chambers, but will that get rid of this much damage?


Also the last picture is of the head itself, can any one tell me what car/engine/year this head came from? I know its a PR3 casting, but theres no year stamp from what I can tell, or atleast its not in the spot it should be.




Thanks in advance for any insight.


And before anyone asks, no I will not be attempting to fix this myself with some backyard tools lol. I just need to know what im looking at to get it usable again. I know it needs a thorough hottank to get rid of the nasty ghetto paint and resurface for sure, but will a simple process get rid of whats shown below?

 

I believe thats a 1990 JDM B16

 

im no expert, but id say give it to a machine shop , have it checked fro cracks in that area, and have them deburr the damage, then deck the head. after installation, do a compression and leakdown on that cylinder to ensure no further damage.

 

just noticed, the valve seats need to be fixed / replaced, as you can see one of the valve seats has a large chunk out of it.

 

Its fix able.. a slight resurface and some minor sanding work should make that puppy good as new.

 

I dont see any chunks missing from any of the seats. I think youre looking at a chunk missing from the top cut into the chamber. Any machine shop should be able to fix that right up.

 

^Thats who I wanted to hear from lol. Thanks guys, just wanted to make sure I wasnt taking it in for something I wasnt prepared for.

 

My eyes are bad I am 56 years old however this red circled valve seat sure looks cracked to me! And the seat next to the red circle one appears to be shifted in the head and likely is no longer concentric.

 

Booth seats will likely need to be replaced and recut.

 

Well, what was stated was that a large chunk was missing and there is no large chunk missing. What you have circled isnt a crack. Cracked seats dont look like that. I would bet that thats just some debris.

 

No worries, I am 29 and I already wear glasses to read. Its tough to diagnore stuff over the internet, but cracks in steel dont look like that, they are usually hairline and very difficult, though not impossible, to see in a picture.

 

Would you care to wager some head work on that?

 

Hell no! Doing headwork is no fun. I'll wager some internet cool points though, they dont mean much to me.

Like I said, diagnosing something on the internet is real tough. From where I am sitting, it doesnt look like a crack but it may be. The OP could find out in 3-4 seconds by dragging his fingernail across it.

 

Will check tomorrow when im back home and post pictures from other angles as well. The only decent machine shop near me is a 1 1/2 hour drive to RLZ and I want to be sure if its worth salvaging before I make the trip.

 

Move foward, it is worth salvaging even if you need to replace two valve seats. The rest of the dammage is superficial and easily cleaned up.

 

like stated above, take it to a machine shop, clean up the little dings in the chamber to get rid of any possible hot spots, get a valve job and resurface sone and ur good to go. unless the seats are cracked then u need to replace them of course.


mike

 

The circled part in the picture above was actually just a black spot, wiped it off with my finger. No cracks. I inspected it thoroughly under a light for about 15 minutes to make 110% sure. None of the seats are chipped/cracked

 

fyi, when you reseat the valves, that little thing u have circled will go away..

 

What do I win?

Jk, glad there's no serious damage.

 

Two Honda-Tech All Motor Internet Points!

Had your chance and didn't want to gamble, anyway good call, good result, everybody is happy.

 

Yeah, didnt want to gamble 8-10 hours of my time on a picture posted on the internet.