installing injectors

[tomcat]

there some sort of trick getting them onto the fuel rail?
i am using ford 24# injectors from precision auto injectors, and a '99 fuel rail. should i be using the jeep o-rings instead of the fords?

[SilverXJ]

Lube the o-rings with some motor oil and rock the injector back and forth gently until they pop in.

[IH 392]

Silicone grease or even plain old Vaseline is the best stuff to use.

[gradon]

"She uses Va--aa--aaaaaa--seline"

[tomcat]

"She uses Va--aa--aaaaaa--seline"

so i should listen to the flaming lips when I install them, got it.

thanks guys

[RAPTORFAN85]

"She uses Va--aa--aaaaaa--seline"

Is that the song about vasaline on toast? Man do I hate that song...

[tomcat]

my good friend who works for Detroit diesel came up today and helped do the physical install. i showed him what i was trying to do, and he recommended the following.

used Emory cloth to clean up the injector rail to remove all the scaling and rust. nice and shiny, not gouged.
used engine coolant to lube the o-rings, not a petrol. product like oil or vasaline.

slid right in like a charm, apparently, it is in the factory service manual for Detroit Diesels for injector installation to use engine coolant as the lubricant. probably because you don't want to accidentially over-fuel a diesel with oil or other similar product.

side story on overfueling diesels
they had a guy that didn't flush out the charge air cooler (intercooler) after the turbo blew up. CAC was full of oil. they do a "no load" test when the motor is put in. all newer diesels have electonic throttles, so you just floor it and it goes straight up to redline..... oil made its way into the intake, and overfueled the motor, way past redline. shot the piston out the top of the motor, through the head, and through the roof of the building......

[SilverXJ]

side story on overfueling diesels
they had a guy that didn't flush out the charge air cooler (intercooler) after the turbo blew up. CAC was full of oil. they do a "no load" test when the motor is put in. all newer diesels have electonic throttles, so you just floor it and it goes straight up to redline..... oil made its way into the intake, and overfueled the motor, way past redline. shot the piston out the top of the motor, through the head, and through the roof of the building......

So.. the piston went through the head, on either an exhaust or compression stroke, and still had enough momentum to blast it through the roof of the building... not to mention that it wasn't blown out the oil pan on a combustion stroke...

[RAPTORFAN85]

That's BS, I work at a Mack dealership and have seen plenty of engines blow up from over fueling the engine and that wouldn't happen. Any truck new enough to have an electronic throttle will also have aluminum pistons. The piston exploding in the hole would be worst case. And to boot, some of those cylinder heads are 6" steel and the CAT heads weigh over 300LBS. Over fueling happens when the turbo goes and it dumps the oil into the intake, so now the engine revs higher because it has more fuel, thus pumping more oil which goes back into the intake etc. etc. It's a chain reaction thing, Any oil in the inter cooler would burn off rather quickly and wouldn't continue to feed the engine enough oil to run away. If they didn't wash out the CAC then worst case would be a piece of turbo going threw the engine. Washing out the CAC after loosing a turbo is also in the Detroit factory service manual...

[coas]

Never use silicone grease in the fuel system or when the rubber is in under pressure.
Silicone grease is bad for the O2 sensor, it will also cause the o-ring to expend and soften.

The best you can use is Lithium grease, have no effect on engine parts, will not damage rubber and last for years in harsh condition.

[IH 392]

Never use silicone grease in the fuel system or when the rubber is in under pressure.
Silicone grease is bad for the O2 sensor, it will also cause the o-ring to expend and soften.

Use enough to get it to slide in, not the whole tube and we use it on rubber parts at work because it DOES NOT harm the rubber parts!

[the_wrench116]

man did he step off the deep end or what. hes in a tar pit now oh well i'm going to go out on a limb and say you could probably find a video or 2 on u tube that showes what happens when you over rev a diesel. do some looking around next time and maybe you wont drown.

[tomcat]

man did he step off the deep end or what. hes in a tar pit now oh well i'm going to go out on a limb and say you could probably find a video or 2 on u tube that showes what happens when you over rev a diesel. do some looking around next time and maybe you wont drown.

what the heck are you talking about?

[bulfo4]

Hey, as a heads up for anyone using Precision Auto Injectors, here's what happened to us.

This seller is HORRIBLE about communication. Can't get him on the phone or via email, email from his site or anything.

We bought 24lb Ford injectors from Precision Auto Injectors back in June to go into a brand new stroker engine for my 1996 XJ. Contacting the seller in the first place was really, really difficult, but we finally got the injectors for the agreed price.

It maybe common knowledge to others, but it was new to us, that if you don't install injectors within a couple of days of receiving them, they'll clog up or stick. They can be shipped with some kind of oil in them that prevents them from sticking, but that only buys you a few weeks. Seller didn't ship with this oil in it, and since our install took longer than anticipated, we had to ship them back, get them cleaned again, and have them shipped back to us.

Our install had even more problems, and we found out that one of the injectors had stuck open gas-washing a perfectly good cylinder. This cost us a piston, connecting rod, rings, and we were barely able to salvage the block, plus the nightmare of having to completely disassemble a brand-new engine and take it to a machine shop.

So we contacted the Seller after great difficulty and he offered to reclean them, but only after weeks and weeks of not returning phone calls or emails. We couldn't get an address out of him for a month! Finally we got an address, send him the injectors, and have been waiting and waiting and waiting, with no word on whether he's working on them, shipping them back, or anything!

Getting injectors from this seller has cost us hundreds of dollars, and being out a Jeep, which is my DD for over 3 months!!!

I understand that on a forum like this, a vendor's reputation is very important, and I don't wish to drag him through the mud, but I don't want anyone else to go through what I went through. Anyone who wants to is more than welcome to contact me for questions about this.

The product MAY be worth buying, but through lack of communication, this has been a total nightmare! If the seller comes through, I'll edit this post, but I can't stress enough, beware of this seller.

If ANYONE knows him and can help me get some resolution on this, I would truly appreciate it.

Tom

Precision Auto Injectors
Wojtek Wlodarski

407-536-4509
[email protected]
http://myworld.ebay.com/precisionfuelinjectors

[bulfo4]

Couldn't edit the previous post after all, but great news - We finally got our injectors! I guess we just needed to be a little more patient. Probably all my fault. But they're here now and we're looking forward to trying them out.