Is this head repairable?
Discussion
stevieturbo said:
You've posted a picture of a dirty cylinder head.
It really isnt clear where the problem may lie, or how bad it may be...if indeed it is as you are describing.
Try clicking on the photo then click on the link, there's a fkoff big hole in the port.It really isnt clear where the problem may lie, or how bad it may be...if indeed it is as you are describing.
OP, it is repairable but is it worth it?
Edited by jagracer on Wednesday 29th July 08:41
Can you get to the back of the damaged area? If you can it's probably salvageable, if not it's likely scrap.
Wondering about the level of competence of a porter who hogs out so much in that area of a port it goes through - if that is what's caused it.
Wondering about the level of competence of a porter who hogs out so much in that area of a port it goes through - if that is what's caused it.
Edited by 227bhp on Wednesday 29th July 09:20
Don't think i can get to the back of it.
It's got about a grands worth of porting on it - engine made 270bhp on standard valves so it's a good head, other than leaking oil into my exhaust, which is probably a fire hazard.
Was thinking, grind it back, weld it then re-port. Typical cold weld repair. Just wondering if anyone has had similar and successful repairs undertaken.
It's got about a grands worth of porting on it - engine made 270bhp on standard valves so it's a good head, other than leaking oil into my exhaust, which is probably a fire hazard.
Was thinking, grind it back, weld it then re-port. Typical cold weld repair. Just wondering if anyone has had similar and successful repairs undertaken.
It would need a very good TIG welder to get the torch in there to fix it but I have seen such miracles worked before. What you may find is that it's so thin around the visible hole that when you try to weld it up the hole grows and maybe in a direction that you just cannot get to. Nothing ventured nothing gained though.
What is the other side of the hole?
I’ve seen similar on a Nissan SR20 head inlet port where the porter had done through into the hydraulic tappet oil gallery.
We made up a shorter tappet to gain a bit of space then filled the hole from the tappet side with an epoxy. Not sure how successful that would be on an exhaust port. Welding would have meant remachineing the tappet bore. Not fun.
I’d weld it if you can.
I’ve seen similar on a Nissan SR20 head inlet port where the porter had done through into the hydraulic tappet oil gallery.
We made up a shorter tappet to gain a bit of space then filled the hole from the tappet side with an epoxy. Not sure how successful that would be on an exhaust port. Welding would have meant remachineing the tappet bore. Not fun.
I’d weld it if you can.
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