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#15
by
Gizmoman
on 20 May, 2013 22:18
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Very sorry to hear of your mishap.
Come to think if it, mine had a bad injector before it toasted the rings into the piston on #4. My cups never fell out but they were all cracked a bit and #3 was real loose.
Thanks for the boost libby - I'm still at it. As an overview of my investment. . .
Brand new injectors from Giles
Giles built pump
EGT sensor (with an alarm) installed in the manifold
External oil cooler and dual remote filters
No more WVO - just nice clean diesel
custom WAIC
Also additional quick acting sensing of
oil temp
Water temp
Intake air temp (all have settable alarms as well)
Nearly every weekend over the last ten months and daily reading here.
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#16
by
theman53
on 21 May, 2013 06:01
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Yeah bad injector coupled with cracked precups is a bad day. Mine was just plain and simple too hot too fast. The pump would throw the fuel to it and I think the cups grew faster than the head and stayed bigger longer than the head liked. Eventually the head didn't come back down but my precup did.
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#17
by
Alcaid
on 21 May, 2013 07:00
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Try putting an equally old and inefficient turbo on a TDI and drown it with diesel the same way you did here and see if the TDI survives
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#18
by
Gizmoman
on 21 May, 2013 07:07
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If a bad injector can ruin the engine so easily, what's the best insurance against having one?
When mine went "bad" it started as a clicking noise which was tough to hear over the rest of the clacking engine. The only reason I knew it was an injector was that it only did it under load - when coasting it stopped (I learned that here).
It started soon after I flipped over to WVO for a while as I was almost out of fuel in the middle of nowhere.
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#19
by
RabbitJockey
on 21 May, 2013 07:17
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Try putting an equally old and inefficient turbo on a TDI and drown it with diesel the same way you did here and see if the TDI survives
haha!!! quite true. now that i have diesel mekken in my news feed on facebook i've seen him post pictures of some di engines that had a bad injector which pissed a hole through the piston.
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#20
by
libbydiesel
on 21 May, 2013 08:03
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A bad injector that holes a piston causes only destroys the piston. A piece of precup falling in destroys the piston, head, usually bends the rod and sometimes destroys the block or at least causes damage that requires rebore. On an AAZ the difference is $75 vs. $900-2000.
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#21
by
wolf_walker
on 21 May, 2013 09:09
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If a bad injector can ruin the engine so easily, what's the best insurance against having one?
Father used to say, sometimes you get the bear, sometimes the bear gets you...
I bought a pop tester so if I have one crap out I can't blame anyone but me, and whoever made the nozzle.
I'm developing some thoughts on that subject as I play with injectors and nozzles too speaking of which..
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#22
by
RabbitJockey
on 21 May, 2013 10:28
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valid point
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#23
by
Whitbread
on 21 May, 2013 15:24
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Try putting an equally old and inefficient turbo on a TDI and drown it with diesel the same way you did here and see if the TDI survives
I was running stock boost and just enough fuel for a light haze at full throttle. I wouldn't call that drowning it in fuel. My ALH with a 12mm pump and 5x.013's nozzles is drowning in fuel; but 65 psi cleans it up nicely
.
A bad injector that holes a piston causes only destroys the piston. A piece of precup falling in destroys the piston, head, usually bends the rod and sometimes destroys the block or at least causes damage that requires rebore. On an AAZ the difference is $75 vs. $900-2000.
Exactly. And realistically, the only time I've ever seen it happen is when you blow a nozzle tip off. Which I've yet to see happen on a TDI; only on cummins/duramax motors with dual cp3's running 26+kpsi rail pressure with 5x.020+ nozzles.
I'll be sure to post up pics of the AHU swap
.
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#24
by
Gizmoman
on 21 May, 2013 16:43
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If a bad injector can ruin the engine so easily, what's the best insurance against having one?
Father used to say, sometimes you get the bear, sometimes the bear gets you...
I bought a pop tester so if I have one crap out I can't blame anyone but me, and whoever made the nozzle.
I'm developing some thoughts on that subject as I play with injectors and nozzles too speaking of which..
I'd build a bear trap to at least improve the odds;D
Really, couldn't you attach a sensor to each hard-line and monitor something? I spoze a leaky one wouldn't put out much of a signal though and I believe that's what really does the most damage.
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#25
by
libbydiesel
on 21 May, 2013 17:30
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You could probably take a reading off the glow plugs.
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#26
by
Gizmoman
on 21 May, 2013 17:32
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You could probably take a reading off the glow plugs.
Interesting thought.
They are basically resistors aren't they?
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#27
by
wolf_walker
on 21 May, 2013 18:09
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Service em when the t belt is changed and other than bad luck all is usually well. I don't remember if VW gave a service interval on injectors. I bet Mercedes did.
Sent from my SCH-I535 using Tapatalk 2
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#28
by
hillfolk'r
on 21 May, 2013 19:02
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Yea man i hear ya on the tdis. They have so much grunty torque over the idi's.
i literally took my 12mm pump off my idi and put it on my tdi and would rip your head off.
You can only jam so much fuel into that little prechamber whistle before it wants to come out and say hello to your piston. I like the Idis cause they rattle so much at a stop light it makes everyone look. Or the drive thru: sir please turn your truck off.
Yea the Idis are ok and for a mild tweak but IMO for serious power go to a tdi-m you will stop breaking parts.except 3 or 5 transmissions.start stocking them like cordwood
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#29
by
RabbitJockey
on 21 May, 2013 19:34
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Service em when the t belt is changed and other than bad luck all is usually well. I don't remember if VW gave a service interval on injectors. I bet Mercedes did.
Sent from my SCH-I535 using Tapatalk 2
I'm sure they did I think it's 100k miles tho. But I agree they should at least be tested during a timing belt change.
Andrew. Glow plugs are definitely a good indicator haha. When my old rabbit used to run away it would eat the whole tip off of each glow plug