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Replacing the distributor on the 3.0L V6 engine. (The correct method) #485055 08/06/04 01:41 AM
Joined: Nov 2002
Posts: 4,127
DaphneD Offline OP
Roll Me Over
Well, I woke up in a cold sweat from a nightmare one night - in the process of tearing down my old engine, I hadn't made any mating marks before removing the distributor. As it turns out, I would only have to fear this if the only thing I was replacing was the distributor assembly. In this case, I'm replacing my whole engine so I slept a little better the following night. <img src="/forums/images/graemlins/smile.gif" alt="" />


Looking at the front of the driver's side head, it's obvious how the distributor fits in. Heck, if your to this point it was obvious how it came out too! <img src="/forums/images/graemlins/smile.gif" alt="" />
(please disregard my half-assed [color:"red"]red scribble[/color] in this photo)
[Linked Image]
Before starting, make sure that the driver's side sprocket is aligned with it's mating mark for Top Dead Center (TDC). It's pretty easy to do on this side as the cams will just "click" into position.


Luckily, Mitsu engineers coordinated two mating marks ([color:"red"]circled in red[/color]) on the distributor shaft and gear to make it easy for dummys like me.
[Linked Image]

In order to get this right, first align the marks
on a straight line. You'll notice that the mating
mark on the distributor shaft falls nearly directly
between two gear teeth:
[Linked Image]

Carefully drop the rotor assembly into position on the front of the head making sure that the adjustment stud fits through the groove on the distributor flange (that would be my [color:"red"]keenly drawn red line[/color]).
[Linked Image]
You'll note that rotor is slightly off-center towards the outside of the engine. That will change shortly.


[Linked Image]
As you continue to drop the distributor into position, the rotor will begin rotating counterclockwise slightly. This motion is normal and is due to the gear teeth lining up.

Side note: The angle you see ([color:"red"]drawn in red[/color]) is how you will later fine-adjust the ignition timing. Basic ignition timing for this engine is 5 Before Top Dead Center (BTDC), which the computer will advance to 15 at normal idle... but that's another post. <img src="/forums/images/graemlins/wink.gif" alt="" />


If you've done it correctly, the rotor should be aligned as such:
[Linked Image]
<img src="/forums/images/graemlins/kewl.gif" alt="" />
[Linked Image]
Note how the rotor will align with the little "towers" on the distributor plate edges.

Now on to the distributor cap. Any casual observation will note that the actual contacts on the inside of the distributor do not exactly correspond with the nodes on the outside of the cap:
[Linked Image]
To menatlly facilitate your understanding of the inner-workings of the distributor cap, I've highlighted the nodes on the top of the cap ([color:"blue"]in blue[/color]) as they correspond with the actual contact positions ([color:"red"]in red[/color]). Note where #1 actually is. <img src="/forums/images/graemlins/wink.gif" alt="" />

Now when you drop the cap onto the rotor assembly, it should all become clear. The terminal for #1/TDC lines up with the position of the rotor.

[Linked Image]
Finished. It was easy, wasn't it?

-DougB <img src="/forums/images/graemlins/cheers.gif" alt="" />


'89 Raider 3.0L V6 (6G72) w/ AW372L (A44DL) A/T
"The Millennium Falcon of automobiles"
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Re: Replacing the distributor on the 3.0L V6 engine. [Re: DaphneD] #485056 08/06/04 01:57 AM
Joined: Feb 2001
Posts: 9,781
D
DougH Offline
Mitsubishi Forum Moderator
Excellent Doug, thanks for the write-up. Archive


DougH
1995 Sr. High speed dirt!
www.terminalstills.com
Re: Replacing the distributor on the 3.0L V6 engine. [Re: DaphneD] #485057 08/06/04 02:02 AM
Joined: Dec 2001
Posts: 11,727
LRJ4x4 Offline
Web Wheeler
*****
I understand it completely now, to bad I have a 2.6 <img src="/forums/images/graemlins/smile.gif" alt="" />

Nice work, Archive this baby!

<img src="/forums/images/graemlins/kewl.gif" alt="" />


98 Montero with cold weather package
96 Toyota Land Cruiser, fully locked Mall Machine :-)
Re: Replacing the distributor on the 3.0L V6 engine. [Re: LRJ4x4] #485058 08/06/04 03:31 AM
Joined: Nov 2002
Posts: 4,127
DaphneD Offline OP
Roll Me Over
Hang on! Before we get all archive crazy, lemme try and crank this thing up to make sure I've got it correct. <img src="/forums/images/graemlins/wink.gif" alt="" />

EDIT: Okay, should be edited so it's correct now. Although I still have yet to crank it up to make sure. <img src="/forums/images/graemlins/smile.gif" alt="" />

EDIT II: yep, Raider started on the first crank! <img src="/forums/images/graemlins/kewl.gif" alt="" />

Last edited by DougB; 08/27/04 08:40 PM.
Re: Replacing the distributor on the 3.0L V6 engine. [Re: DaphneD] #485059 08/06/04 03:38 AM
Anonymous
Unregistered
USA cap, I see! <img src="/forums/images/graemlins/patriot.gif" alt="" />

Re: Replacing the distributor on the 3.0L V6 engine. #485060 08/06/04 03:57 AM
Joined: Nov 2002
Posts: 4,127
DaphneD Offline OP
Roll Me Over
Quote
USA cap, I see! <img src="/forums/images/graemlins/patriot.gif" alt="" />

MOPAR. Although, I prefer the Mitsu cap (slightly better quality).

Re: Replacing the distributor on the 3.0L V6 engine. [Re: DaphneD] #485061 08/06/04 06:22 AM
Joined: Dec 2000
Posts: 6,892
sparkem Offline
Trail Leader
***
Are you sure it is supposed to go one tooth back? Is this from a manual?


I just want to tell you both good luck, and we're all counting on you.
Re: Replacing the distributor on the 3.0L V6 engine. [Re: sparkem] #485062 08/06/04 06:55 AM
Joined: Nov 2002
Posts: 4,127
DaphneD Offline OP
Roll Me Over
Hehe, no - I'm not actually sure. I originally had it set with the timing marks lined up, but it didn't seem correct. Let me know if you have better info!

Last edited by DougB; 08/27/04 08:41 PM.
Re: Replacing the distributor on the 3.0L V6 engine. [Re: DaphneD] #485063 08/06/04 06:11 PM
Joined: Dec 2000
Posts: 6,892
sparkem Offline
Trail Leader
***
I read in an old post, just line up the marks and put it in. I dont think that was from a manual though. Does anyone know if it will fire up if one tooth is off??


I just want to tell you both good luck, and we're all counting on you.
Re: Replacing the distributor on the 3.0L V6 engine. *DELETED* [Re: sparkem] #485064 08/06/04 07:03 PM
Joined: Nov 2002
Posts: 4,127
DaphneD Offline OP
Roll Me Over
Post deleted by DougB

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