Is this head repairable?

Is this head repairable?

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Discussion

e8_pack

Original Poster:

1,384 posts

180 months

Wednesday 29th July 2015
quotequote all
Bought a new engine with 'slight' porosity in the head. Head is a ported duratec by a very well regarded specialist.

After fitting and a few minutes running it became clear the slight porosity was a bit more severe.

I found this:



Is it repairable? Is exhaust port 1 and was smoking like the bismarck

stevieturbo

17,229 posts

246 months

Wednesday 29th July 2015
quotequote all
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.

jagracer

8,248 posts

235 months

Wednesday 29th July 2015
quotequote all
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.
OP, it is repairable but is it worth it?

Edited by jagracer on Wednesday 29th July 08:41

jagracer

8,248 posts

235 months

Wednesday 29th July 2015
quotequote all
There you go

227bhp

10,203 posts

127 months

Wednesday 29th July 2015
quotequote all
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.

Edited by 227bhp on Wednesday 29th July 09:20

e8_pack

Original Poster:

1,384 posts

180 months

Wednesday 29th July 2015
quotequote all
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.

one eyed mick

1,189 posts

160 months

Wednesday 29th July 2015
quotequote all
It surely has to be worth a go, uber cleanliness needed but I am sure it must have been done before

fatjon

2,144 posts

212 months

Wednesday 29th July 2015
quotequote all
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.


Anonymous Bodge

38 posts

106 months

Wednesday 29th July 2015
quotequote all
Don't know where in the country you are, but Chris in Uxbridge is a genius
W V H Welding Services
6 Midas Industrial Estate, Longbridge Way, Cowley, Uxbridge, Middlesex UB8 2YT
Phone:01895 233501

stevieturbo

17,229 posts

246 months

Wednesday 29th July 2015
quotequote all
Proper head specialists should be able to weld and repair it.

But there would always be the concern....which part of the head might be next ?

crogthomas

17 posts

145 months

Wednesday 29th July 2015
quotequote all
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.