Engine/Transmission (1994 - 1998) bosch 370 injectors

[nfox]

370 injector copper washers

Why does a person have to install . 020 copper washers when installing 370 marine injectors? They factory copper washers are a lot thicker. Just curious!!

 

[Cummins Corvette]

Because contrary to popular belief, the 370 injector has a 155-degree spray angle. This means that the injector is spraying the fuel higher than the original injector, which has a 145-degree spray angle. The thinner washer helps to counter this by putting the tip down farther into the combustion chamber. If the 370 had a 145-degree spray angle, then using the thin washer would have very bad results. I have tried the thin washer with my 180 injectors and it resulted in much more smoke, less fuel economy, and higher egts. This angle is measured from strait up. FYI the angles are strait from Bosch. There are no 370 injectors with a 145-degree spray angle because there are no 370 hp engines that use the same pistons we have. I am DIFINETELY not saying that the 370 injector will not work well in our trucks because we all know that it does. Heck, I have a set that I am waiting to install and it is taking quite a bit of restraint not to put em in. Oo. Oo. Oo.

Chris

 

[therabbittree]

hello what is the proper part # for the "good" 370 injectors . . i just bought some used and the # by the top union side of the injector says 5968... ... i read in a old thread the piers 370's say 5969... . what are mine?... any other way to tell the right injectors?...

thanks

Deo

\x/ hillfolk!

 

[Cummins Corvette]

The part # is not on the injector itself. If you have the box it should say 0 432 131 715. That number on the tip is some other number, but that is the number on many of the correct 370s. 5969 and 5968 are both ok.



I know it has been posted a million times, but I can't remember how many hp the 370 is good for over a 180 or 215 injector. Anyone care to refresh my memory? I think it is around 40 or so... .

 

[Jim Fulmer]

Chris, your right on the 40 or so HP that's what I've heard too, but I also heard DD3's for 12V's are 75 HP but Don M dang sure didn't get that with his change, I'm wondering if the 75 number is over stock with stock plate, now that would make since.



Jim

 

[therabbittree]

mummn cummins corvette . . i don't have a box... just teh injectors the guy sent them to me with a set of enterprise delivery valves and a #4 cam plate... i wonder what that should do hp and torque wise with the big p pump 12mm plungers from 8. 3L i have?... the rest of the #s off the injectors are... ... .

brasil kdal 59p14 181 08 "260 bar" and "908" in a circle

any one have a idea?

thanks

deo

\x/ hillfolk!

 

[R.ebel]

Injectors

The 370's and the DD3's are real close in HP, almost the same.

 

[HoleshotHolset]

Deo,



You'll be lucky to spin the rollers with that pump... . :-laf

(just kidding!)



Matt

 

[Cummins Corvette]

Originally posted by therabbittree

mummn cummins corvette . . i don't have a box... just teh injectors the guy sent them to me with a set of enterprise delivery valves and a #4 cam plate... i wonder what that should do hp and torque wise with the big p pump 12mm plungers from 8. 3L i have?... the rest of the #s off the injectors are... ... .

brasil kdal 59p14 181 08 "260 bar" and "908" in a circle

any one have a idea?

thanks

deo

\x/ hillfolk!

All p 7100 pumps used in doges have 12mm plungers. The numbers on the outside of the injectors are just the numbers for the holder and the breaking pressure. You would need to take the tip out, get the number from that, and cross reference it in the bosch manuals and determine which injector it is.

 

[Rammin On]

You DON'T need to take the tip out of the injector to get the # off of it ... . its etched in ... . clean them up real good and give me the 4 digit body # and 4 digit tip # and I'll tell you what you need to know about that injector

 

[Cummins Corvette]

Um... the guys at the local bosch shop told me that the number on the outside part of the tip could not be used to determine which injector it is. Guess they were wrong? I dunno. The number on the outside is not the part # for the tip. You must dissasemble the injector to get that number.

 

[nfox]

Injector Swap

How long does it take to swap injectors? Is there any tips when doing the job to make it easier?

 

[Deezul1]

It took me about an 1. 5 hours the 1st time I did it. Blow out the holes that the injectors are in before removing them so no dirt gets in the engine. Some sort of puller is handy to remove them once the nut is removed. I remove all the fuel line mounts and gently pushed the lines aside rather than removing them but dont bend them as they are under very high pressure and the bent part will cause trouble.

 

[The patriot]

Re: Injector Swap

Originally posted by nfox

How long does it take to swap injectors? Is there any tips when doing the job to make it easier?

Took me about 3. 5 hours without a puller.

Get a puller first.

Eric

 

[JGK]

The old ones would be a real booger to get out without a puller. Some one on here once explained how to build one out of a metric nut and bolt (which I did) which works good. Don't have the link but I printed it out and have it on file somewhere, if you need it.



I've done it without removing the injector lines but I think if I were to do it again I'd remove them completely.



There is a little square cut O-ring on each that fits on top of the retaining nut between it and the injector body that acts as a dust/dirt seal. Some people I'm sure just pitch them. I figure they are there for a purpose. I used a deep socket that just fit over the injector body to start it, then used a small flat screwdriver to push it down in. This is the slowest/most tedious part of the project, IMO.



Otherwise, it's pretty straight forward.



-Jay

 

[Cummins Corvette]

Here's what I did:

I used a nut that fits the top of the injector, a 1 1/4" long piece of 1" pvc, and a 1/2" washer (total diameter of 1 3/8") to make a quick and cheap little puller. Just take the big nut completely out, put the piece of pvc over the injector, then the washer and the nut. Tighten the nut and the injector comes out. Piece o' cake.



For the seal, use a bit of grease to help it go back in.



Chris

 

[T. Baker]

Well I guess I did the crude way but I just put a pair of vice grips on the flats and hooked the vice grips with the slide hammer hook and they came out easy. It didn't hardley even mark the old injectors not that I cared that much. There was alot of carbon that came off down in the hole. I sure didn't want that to fall into the cylinder so after thinking for a while I grabbed a tapered bar that fit the small hole going into the cylinder and blew the big hole out with the air gun around the bar. Keep every thing really clean. The biggest pain was the square O rings.

Treven.

 

[nfox]

Injector Puller

I've got a injector puller from Snap-On, has anybody ever used one? It's a small slide hammer that threads on to the injector.

 

[HoleshotHolset]

The Snap-On slide hammer is REALLY nice to pull out the injectors... . the back two are a bit of a pain, though. I took off the slide part of the setup and just left on the threaded piece... . a bit of a pop with a big pry bar... and they'll come right out.



Square o-rings? The one's I have changed out all had round ones... .



Matt

 

[JGK]

Square-cut O-ring

Matt,



You mean your injectors (and O-rings) are round, not square?!



OK. When I wrote that I wondered if anyone would question it. What I mean by square cut o-ring is, if you cut the ring and looked at a cross section, it has a square shaped cross section, rather than round as most are.



Sorry for the confusion.



-Jay