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cracked injector bosses!!!!!!
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Topic: cracked injector bosses!!!!!! (Read 5374 times)
December 20, 2007, 08:40:49 pm
dillenger1
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777
cracked injector bosses!!!!!!
«
on:
December 20, 2007, 08:40:49 pm »
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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Cummins 4bta- 85 dodge prospector short bed
28 mpg!!and i can pull down a house!
1.6td in toyota pickup
10mm head ,t3 intercooled.
Reply #1
December 20, 2007, 09:49:49 pm
dillenger1
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777
cracked injector bosses!!!!!!
«
Reply #1 on:
December 20, 2007, 09:49:49 pm »
help!
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Cummins 4bta- 85 dodge prospector short bed
28 mpg!!and i can pull down a house!
1.6td in toyota pickup
10mm head ,t3 intercooled.
Reply #2
December 20, 2007, 09:51:06 pm
dillenger1
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777
cracked injector bosses!!!!!!
«
Reply #2 on:
December 20, 2007, 09:51:06 pm »
Am i screwed ? Is it beyond repair?Its a hydr. head.Can it be welded succesfully?
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Cummins 4bta- 85 dodge prospector short bed
28 mpg!!and i can pull down a house!
1.6td in toyota pickup
10mm head ,t3 intercooled.
Reply #3
December 20, 2007, 11:00:59 pm
Quantum TD
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1195
cracked injector bosses!!!!!!
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Reply #3 on:
December 20, 2007, 11:00:59 pm »
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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Reply #4
December 20, 2007, 11:43:23 pm
jtanguay
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6879
cracked injector bosses!!!!!!
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Reply #4 on:
December 20, 2007, 11:43:23 pm »
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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Reply #5
December 21, 2007, 06:12:49 am
dillenger1
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777
cracked injector bosses!!!!!!
«
Reply #5 on:
December 21, 2007, 06:12:49 am »
im gonna try to take the pics ,but i dont knoe my dig camera isnt that good
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Cummins 4bta- 85 dodge prospector short bed
28 mpg!!and i can pull down a house!
1.6td in toyota pickup
10mm head ,t3 intercooled.
Reply #6
December 21, 2007, 07:35:37 am
Doug
Guest
cracked injector bosses!!!!!!
«
Reply #6 on:
December 21, 2007, 07:35:37 am »
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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Reply #7
December 21, 2007, 09:25:36 am
jimfoo
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cracked injector bosses!!!!!!
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Reply #7 on:
December 21, 2007, 09:25:36 am »
And don't forget to put anti-seize on them before putting them back in.
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Jim
1966 Land-Rover 88" with 1.9 1Z which has been transformed to an M-TDI
TFO35 mechanically controlled VNT, IC , and 2.5" exhaust.
Driven daily
Reply #8
December 21, 2007, 02:36:25 pm
Op-Ivy
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514
cracked injector bosses!!!!!!
«
Reply #8 on:
December 21, 2007, 02:36:25 pm »
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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1990 TD Jetta - 490,000Km
Reply #9
December 21, 2007, 07:33:31 pm
dillenger1
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777
cracked injector bosses!!!!!!
«
Reply #9 on:
December 21, 2007, 07:33:31 pm »
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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Cummins 4bta- 85 dodge prospector short bed
28 mpg!!and i can pull down a house!
1.6td in toyota pickup
10mm head ,t3 intercooled.
Reply #10
December 22, 2007, 08:00:49 am
dillenger1
Veteran
Offline
777
cracked injector bosses!!!!!!
«
Reply #10 on:
December 22, 2007, 08:00:49 am »
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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Cummins 4bta- 85 dodge prospector short bed
28 mpg!!and i can pull down a house!
1.6td in toyota pickup
10mm head ,t3 intercooled.
Reply #11
December 27, 2007, 07:21:23 am
dillenger1
Veteran
Offline
777
cracked injector bosses!!!!!!
«
Reply #11 on:
December 27, 2007, 07:21:23 am »
http://i249.photobucket.com/albums/gg206/2253benjamin/volkswagendiesel064.jpg
heres the injector boss ,took me awhile to learn to post pics,sorry
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Cummins 4bta- 85 dodge prospector short bed
28 mpg!!and i can pull down a house!
1.6td in toyota pickup
10mm head ,t3 intercooled.
Reply #12
January 01, 2008, 06:37:08 pm
dillenger1
Veteran
Offline
777
cracked injector bosses!!!!!!
«
Reply #12 on:
January 01, 2008, 06:37:08 pm »
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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Cummins 4bta- 85 dodge prospector short bed
28 mpg!!and i can pull down a house!
1.6td in toyota pickup
10mm head ,t3 intercooled.
Reply #13
January 01, 2008, 08:12:19 pm
jimfoo
Veteran
Offline
2110
cracked injector bosses!!!!!!
«
Reply #13 on:
January 01, 2008, 08:12:19 pm »
You need to gt it properly welded.
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Jim
1966 Land-Rover 88" with 1.9 1Z which has been transformed to an M-TDI
TFO35 mechanically controlled VNT, IC , and 2.5" exhaust.
Driven daily
Reply #14
January 02, 2008, 09:04:01 pm
dillenger1
Veteran
Offline
777
cracked injector bosses!!!!!!
«
Reply #14 on:
January 02, 2008, 09:04:01 pm »
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:
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Cummins 4bta- 85 dodge prospector short bed
28 mpg!!and i can pull down a house!
1.6td in toyota pickup
10mm head ,t3 intercooled.
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VWDiesel.net The IDI, TDI, and mTDI source.
»
General Information
»
Troubleshooting
(Moderators:
malone
,
burn_your_money
,
Vincent Waldon
,
theman53
) »
cracked injector bosses!!!!!!