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Advice on refitting injectors. by DCC on 09 Dec, 2010 11:28
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Hi there.
A friend of mine has a set of GTD injectors that were cleaned, re-calibrated and work very nice. He actually dumped his idi engine in favour of a TDI swap, so I have this set of 4 refreshed injectors I would like to install, as mine are just so-so.
The thing is: how do you tighten the injectors? I don't want to break an injector boss. Any advice you could give me would be very appreciated!
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#1 by Mark(The Miser)UK on 09 Dec, 2010 16:16
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Use a 'T' bar and torque until the heat shield gives, then nip up to the point where greater resistance is felt.
Did he tell you what the number of the nozzles are and their break pressure? -
#2 by Quantum TD on 09 Dec, 2010 17:24
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Use a 'T' bar and torque until the heat shield gives, then nip up to the point where greater resistance is felt.
Did he tell you what the number of the nozzles are and their break pressure?
Or, just use a torque wrench set to 52lbs.
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#3 by theman53 on 09 Dec, 2010 17:34
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Most importantly always go toward the head not away when torquing or breaking loose.
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#4 by Mark(The Miser)UK on 10 Dec, 2010 00:29
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Use a 'T' bar and torque until the heat shield gives, then nip up to the point where greater resistance is felt.
Did he tell you what the number of the nozzles are and their break pressure?
Or, just use a torque wrench set to 52lbs.
Assuming he has one.
Use a swivvel joint to remove incorrect leverage, if your socket set has one. I prefer to get to know the feel for my nuts
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#5 by DCC on 10 Dec, 2010 00:54
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Use a 'T' bar and torque until the heat shield gives, then nip up to the point where greater resistance is felt.
Did he tell you what the number of the nozzles are and their break pressure?
Or, just use a torque wrench set to 52lbs.
Assuming he has one.
Use a swivvel joint to remove incorrect leverage, if your socket set has one. I prefer to get to know the feel for my nuts
The guy brought the injectors to a Bosch workshop and they were cleaned, calibrated and tested. They used oem nozzles and set the break pressure to 155 bar (stock, iirc).
I have a T bar, and a torque wrench as well. I think I will use the T bar to install and tighten them initially and finish with the torque wrench. I also like to feel by hand when bolting things.
Thanks for the advice! -
#6 by Quantum TD on 10 Dec, 2010 09:08
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Assuming he has one.
Use a swivvel joint to remove incorrect leverage, if your socket set has one. I prefer to get to know the feel for my nuts
I've seen these as cheap as $10 on sale. Not sure why anyone would work on anything without one on hand:
http://www.harborfreight.com/1-2-half-inch-drive-click-stop-torque-wrench-239.html -
#7 by jseeley on 10 Dec, 2010 11:15
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Assuming he has one.
Use a swivvel joint to remove incorrect leverage, if your socket set has one. I prefer to get to know the feel for my nuts
I've seen these as cheap as $10 on sale. Not sure why anyone would work on anything without one on hand:
http://www.harborfreight.com/1-2-half-inch-drive-click-stop-torque-wrench-239.html
Have this exact one; picked it up for $10 buck on sale... I'm sure it's wildly inaccurate... but I have used install my injectors a few times... currently running chepo $25 dollar prothe injectors (gotta cut cost somewhere to afford the Giles pump)
I'll get my Bosch ones rebuilt someday...
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#8 by Mark(The Miser)UK on 10 Dec, 2010 15:04
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The most reliable are the simple torsion bar. The micrometer type are prone to lying, but you never know when.
I have honestly just checked out my Snap-On one for the first time: that my former tenant gave me some years ago,
http://buy1.snapon.com/catalog/item.asp?P65=&tool=all&item_ID=8542&group_ID=964&store=snapon-store&dir=catalog
Now that was impressive.
He said his son had replaced it with a newer one... -
#9 by Quantum TD on 10 Dec, 2010 16:20
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The most reliable are the simple torsion bar. The micrometer type are prone to lying, but you never know when.
I have honestly just checked out my Snap-On one for the first time: that my former tenant gave me some years ago,
http://buy1.snapon.com/catalog/item.asp?P65=&tool=all&item_ID=8542&group_ID=964&store=snapon-store&dir=catalog
Now that was impressive.
He said his son had replaced it with a newer one...
Yeah, but it's kinda hard to accurately read the needle when you're torquing a head gasket. -
#10 by Mark(The Miser)UK on 10 Dec, 2010 17:57
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I agree it takes a little practice, and not helped by the 2 scales; Newton-meters and Kg-years or something equally obscure.
The most reliable are the simple torsion bar. The micrometer type are prone to lying, but you never know when.
I have honestly just checked out my Snap-On one for the first time: that my former tenant gave me some years ago,
http://buy1.snapon.com/catalog/item.asp?P65=&tool=all&item_ID=8542&group_ID=964&store=snapon-store&dir=catalog
Now that was impressive.
He said his son had replaced it with a newer one...
Yeah, but it's kinda hard to accurately read the needle when you're torquing a head gasket.