raywin
Well-Known Member
To be honest I am not sure what causes the crack and I am not sure anyone knows 100%, the injector pocket certainly should not wear as the injector doesn't move, i always back mine off 1 full turn. I wonder if the copper washers start to blow and allow the gasses from the cylinder to pass so when it fires you get a huge shock pulse back into the rail which is full of liquid and only has small delivery ports to release the shock.
Mark made a second thread I will look for it.
being too slack won’t hurt anything to be fair
raywin
Well-Known Member
raywin
Well-Known Member
Mine clatter when slack, I tried 1.5 turns and then went back to 1
Thanks Ray
So it seems as the repair worked for Mark so it's worth having it done
I bought a second hand head from a guy in Wales on fleabay and I got ripped off badly and as I paid cash there was no comeback for him I got taken
Being trusting I trusted him but there you go
He had damaged the socket trying to remove no2 injector as he did not turn the cam out of the way
I've now repaired that myself as it didn't run all the way down as a crack so I'm hoping it holds up in the meantime I'll send off my head to the guy who repairs them
Still puzzling as to why it cracks and I'm not sure what to do with the setting of the injector
So it seems as the repair worked for Mark so it's worth having it done
I bought a second hand head from a guy in Wales on fleabay and I got ripped off badly and as I paid cash there was no comeback for him I got taken
Being trusting I trusted him but there you go
He had damaged the socket trying to remove no2 injector as he did not turn the cam out of the way
I've now repaired that myself as it didn't run all the way down as a crack so I'm hoping it holds up in the meantime I'll send off my head to the guy who repairs them
Still puzzling as to why it cracks and I'm not sure what to do with the setting of the injector
Attachments
raywin
Well-Known Member
I'm sorry to hear about the ebay experience, I'm finding more of that, I have bought parts which turned out to be scrap.
The repair looks neat what did you do?
By the way my defender had an aftermarket head when I bought it, not certain but I think it had suffered an injector pocket crack.
I always anneal the copper washers before fitting, softening then then cleaning them up helps.
Just finished a big overhaul on mine.
https://www.landyzone.co.uk/land-rover/at-last-the-big-td5-job.349420/
I had a guy weld it up then machined it back on the cnc at work
When you say anneal it I take it you heat them up to soften them up
And looking at that last link these are a labour of love and your work you have done proves it
My old 200tdi defender never missed a beat really wish I'd never sold it but the disco is a good drive when it's right
It's done 218k so it's not done bad really my issues are compounded by getting stung it wasn't a lot of money it was the principal and the guy is still on there trading.
I'll just have to suck it and see with my repair and get the old one done just in case.
Would you leave the injectors at one turn or 1 1/4 perhaps
raywin
Well-Known Member
Sorry should have mentioned, I bought the brit part ones but the ones with a G in the part number, take the washers and one by one hook them on some wire, hold them in a gas flame until they go dark blue, dont overdo it they can melt, soon as the get dark blue plunge them into cold water. Then I put them on a soft smooth flat piece of wood and polish off any of the oxide on the surface using solvol autosol polish and a soft cloth.
Be careful not to distort them when fitting as they will be soft.
Shouldn't hurt to back off 1.25 turns, you can check to see if it makes the top end noisy,
Backed em off but it does seem a bit more clattery so I'm going to put them back to one turn tomorrow
Not sure if it's the reason for the failure though otherwise it would be across the whole five pockets where the problem seems to more localised to the first two.
I don't know would be interested in finding out though
Not sure if it's the reason for the failure though otherwise it would be across the whole five pockets where the problem seems to more localised to the first two.
I don't know would be interested in finding out though
