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cracked injector bosses!!!!!!
by
dillenger1
on 20 Dec, 2007 17:40
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So ive got my engine dissassembled,and i was inspecting my head up close.I had it under some good light and noticed a funny mark.First i though it was a casting flaw,but then realized that ive got cracks on inj. bosses 1 and 3 ,almost alll the way down to the glow plug.Its cracked all the way through to the thread on the other side.Im furius,but better to find it now.WE started it up before tear down ,and it was running horrible like it was missing.When it came time to take out the injectors i let them soak in pb blaster for a while then i hit them with an impact gun!(bad?)I was wondering if i could have done this,with the impact gun?
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#1
by
dillenger1
on 20 Dec, 2007 18:49
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help!
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#2
by
dillenger1
on 20 Dec, 2007 18:51
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Am i screwed ? Is it beyond repair?Its a hydr. head.Can it be welded succesfully?
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#3
by
Quantum TD
on 20 Dec, 2007 20:00
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If it can be welded, it can be repaired. It's just a matter of how much you're willing to spend on repairing the head, and if you can find a shop willing to take on the job.
In the end, it might be cheaper to find a good core (they run about $75-175), and just rebuild it. Any used 1.6 head is bound to need new guides, seals, and exhaust valves: even if none are bent. The diesel exhaust pits the stems after about 150k.
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#4
by
jtanguay
on 20 Dec, 2007 20:43
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you'd want to remove the injectors while the head is hot. that way there is a far less chance of it cracking. take some pics of the crack if you can. stuff like that sucks
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#5
by
dillenger1
on 21 Dec, 2007 03:12
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im gonna try to take the pics ,but i dont knoe my dig camera isnt that good
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#6
by
Doug
on 21 Dec, 2007 04:35
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I have been running a head that has a welded injection boss for several years with no problems. It is definitely worth the effort to repair especially if you have sunk the money into it to renew the head. A good welder will have no problem as the base casting material is quite dense. Then you have to chase the threads. A machine shop could easily do that or you could probably do it yourself with a home made tool from an old injector body with some slots cut through the threads.
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#7
by
jimfoo
on 21 Dec, 2007 06:25
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And don't forget to put anti-seize on them before putting them back in.
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#8
by
Op-Ivy
on 21 Dec, 2007 11:36
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Thanks for the tip Andrew! Good logic. My Injectors have never been out... Next spring they are going to get a rebuild I thinks.
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#9
by
dillenger1
on 21 Dec, 2007 16:33
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Thanks guys,so do you think its worth tryin to save the hydro. head?I havent put a penny into it yet,but im also planning to boost,and its made for na.What are the real differrences between the heads(na and td)
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#10
by
dillenger1
on 22 Dec, 2007 05:00
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No nothing like that.,just on the bosses inside 3/4 ways down the thread,outside also ,looks like a casting flaw.Sort of like its gonna flake off.they run down almost to the glow plugs.I was wondering if this could cause compression issues afterwards with the nozzles/spray pattern
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#11
by
dillenger1
on 27 Dec, 2007 04:21
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#12
by
dillenger1
on 01 Jan, 2008 15:37
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has anyone ever had luck with the sodering.I saw an ad for some product tc-500 or something.It was an aluminum type soldering rods.they said it could repair a cracked head if it was done properly?
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#13
by
jimfoo
on 01 Jan, 2008 17:12
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You need to gt it properly welded.
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#14
by
dillenger1
on 02 Jan, 2008 18:04
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I have those cracks on two of the bosses.I also have cracks between the valves on three out of four cylinders.Now its a hydro head,would it be stupid to take "solid" for trade?Im still thinking i caused the damage during the strip,but i had no way of know this would happen,well,i guess its a learning experience. :roll:
