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  #1  
Old 09-08-2001, 12:29 PM
Abaloneman's Avatar
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Location: Palos Verdes Est., CA
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Fuel Injectors 300E

I'm changing the fuel injectors in my '88 300E. Anything unusual about this procedure on the 300E ? It looks pretty easy ... I've done it before on other cars that looked much more difficult than the 300E, but was just wondering if there is anything unusual I should watch out for. Thanks.
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  #2  
Old 09-10-2001, 03:44 AM
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Join Date: Nov 2000
Location: Los Angeles, CA/ Hilo, HI
Posts: 92
I'm probably merely stating the obvious here, but nothing special to change these injectors. just get the seals, nozzle holders and the injectors and put them in. Just did mine a couple of weeks ago.
Good luck,
F.J.
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F.J.
81 300 SD grey/palomino 168K miles
84 190E 2.3 black/grey 64K miles (wrecked)
85 190E 2.3 maroon/palomino 92K miles
88 300E desert red/palomino 204k miles
(made to look like a '94-95)
92 400E desert taupe/creme beige 120K miles
(converted to 94-95 E420 looks)
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  #3  
Old 09-10-2001, 04:06 AM
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Location: Surrey, Beautiful British Columbia, Canada
Posts: 750
silly question

are these injectors ready to go? i mean, are they already
bent the right way, or do you have to do it?
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  #4  
Old 09-10-2001, 02:15 PM
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Location: Los Angeles, CA/ Hilo, HI
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They are "ready to go" . You just pop 'em in!
Well, thats what I did. No bending of any kind.
Hope this helps.
F.J
__________________
F.J.
81 300 SD grey/palomino 168K miles
84 190E 2.3 black/grey 64K miles (wrecked)
85 190E 2.3 maroon/palomino 92K miles
88 300E desert red/palomino 204k miles
(made to look like a '94-95)
92 400E desert taupe/creme beige 120K miles
(converted to 94-95 E420 looks)
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  #5  
Old 09-12-2001, 12:15 AM
Abaloneman's Avatar
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Location: Palos Verdes Est., CA
Posts: 11
Fuel Injectors 300E

I just received them today, along with the o-rings, holders, etc. and they are quite straight. The injectors in the car now look straight also, so I think they should be pretty easy to replace. Thanks for your replies.
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  #6  
Old 09-12-2001, 04:12 AM
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Join Date: Nov 2000
Location: Los Angeles, CA/ Hilo, HI
Posts: 92
You are welcome.
Happy motoring!
F.J.
__________________
F.J.
81 300 SD grey/palomino 168K miles
84 190E 2.3 black/grey 64K miles (wrecked)
85 190E 2.3 maroon/palomino 92K miles
88 300E desert red/palomino 204k miles
(made to look like a '94-95)
92 400E desert taupe/creme beige 120K miles
(converted to 94-95 E420 looks)
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  #7  
Old 09-13-2001, 09:06 PM
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Join Date: Sep 2001
Location: Menlo Park, CA
Posts: 23
Alboneman,

Why are you replacing the injectors? Do you consider them a wear item? How much did the parts cost? Did you get an improvement of some kind?

I've never really seriously thought about doing it, but I have thought about getting one of those injector tester/hand-pump units to check them out. My idle's not as smooth as I would like and I was wondering whether you figured they were worth replacing every 100k miles or so?

I have a '90 300TE.

Cheers,
Steve
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  #8  
Old 09-14-2001, 12:03 AM
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Join Date: Jun 1999
Location: Surrey, Beautiful British Columbia, Canada
Posts: 750
whoa guys, two things:

i hope your new injectors are made of brass. (to check
run a magnet.)

also, i looked at my injectors, and they are bent in
various ways. why are they straight?
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  #9  
Old 09-14-2001, 02:08 AM
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Join Date: Nov 2000
Location: Los Angeles, CA/ Hilo, HI
Posts: 92
What kind of injectors for what kind of car are you talking about joel?
I have seen quite a few CIS-injectors and they are all straight. Not bent in any way.

Scanny,
a rough idle could have multiple causes. It could be the injectors, if they are worn from using fuel other than good premium or other injection related parts. Try a fuel system cleaner like Slick 50
You could also have a bad oxygen sensor or collapsed motor mounts(usually the cause!).

F.J.
__________________
F.J.
81 300 SD grey/palomino 168K miles
84 190E 2.3 black/grey 64K miles (wrecked)
85 190E 2.3 maroon/palomino 92K miles
88 300E desert red/palomino 204k miles
(made to look like a '94-95)
92 400E desert taupe/creme beige 120K miles
(converted to 94-95 E420 looks)
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  #10  
Old 09-16-2001, 08:55 PM
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yal yal is offline
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Join Date: Oct 1999
Location: New York, Long Island
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Guys can you tell me what size is the injector bolt? I will be orderering my injectors this week sometime.
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  #11  
Old 09-17-2001, 02:28 AM
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Join Date: Nov 2000
Location: Los Angeles, CA/ Hilo, HI
Posts: 92
I think you need a 14mm and a 17mm or 19mm (not sure, sorry.) open wrench for the injector and the fuel line itself and a 5mm ( I think it was 5mm.) alan wrench or socket for the holder. That is, assuming you have a M103 engine in your car.
Good Luck.
F.J.
__________________
F.J.
81 300 SD grey/palomino 168K miles
84 190E 2.3 black/grey 64K miles (wrecked)
85 190E 2.3 maroon/palomino 92K miles
88 300E desert red/palomino 204k miles
(made to look like a '94-95)
92 400E desert taupe/creme beige 120K miles
(converted to 94-95 E420 looks)
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  #12  
Old 09-17-2001, 11:21 AM
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yal yal is offline
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Join Date: Oct 1999
Location: New York, Long Island
Posts: 2,705
I have an M102 engine but the injectors are the same as the M103 so your numbers should be the same. Thanks!
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