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by **BC847** » Sat Jun 13, 2009 12:43 pm

KTA wrote:One gear tooth is 10deg of rotation, but that is in total reference to the pump therefore it is 20 deg in reference to the motor.

Hmmm . . . . based on that exclusively, compared to the stock/OEM timing, I'm advanced past that approximately 40 crankshaft degrees? :shock:

by **BC847** » Sat Jun 13, 2009 8:35 pm

Am I correct in thinking that our 4-stroke engine would have the crankshaft rotate four times to the one of the IP?

by **Richie O** » Sat Jun 13, 2009 8:43 pm

I would say 2 turns crank one turn cam and pump.

by **BC847** » Sun Jun 14, 2009 6:50 am

I backed it off a wee bit.

by **BC847** » Tue Jun 16, 2009 1:28 pm

BC847 wrote:Am I correct in thinking that our 4-stroke engine would have the crankshaft rotate four times to the one of the IP?

Sometimes I wonder about me. :shock:

by **RSWORDS** » Tue Jun 16, 2009 6:57 pm

Does anyone have any pics of the front of the engine with the cover removed? I'm really having trouble wraping my brain aroun what I need to do to advance my timing 1 tooth. I think its because I've never had my cover off and the few pics I havve seen I never paid attention too. just trying to get a game plan together.

Thanks Guys!

by **PJ 3** » Tue Jun 16, 2009 7:09 pm

I've seen one before but can't remember where. Might have been cummins forum. If I find it I'll copy and paste it for ya.

by **PToombs** » Wed Jun 17, 2009 6:01 pm

Snoot posted one recently where someone was asking about the timing marks. In the last month, IIRC.

by **RSWORDS** » Wed Jun 17, 2009 6:27 pm

Thanks pete, I found one, so if I'm thinking correct I need to pull the front cover, pull this gear and rotate it and teh pump shaft one tooth clockwise. Correct? I still dont understand why I'm having issues with this. :lol:

by **BC847** » Wed Jun 17, 2009 6:30 pm

Talking about IP timing, I've recently read elsewhere that "according to the book", 1.20mm lift roughly equals 12* (for example). It seems I recall reading that a long while back.

Ever heard of such?

Bobby, seriously, you'll spend more time messing with the gear-case cover than advancing the IP.

by **crewcabxlt** » Wed Jun 17, 2009 7:15 pm

i,ve come across old posts from "pastor bob" stating simular, but even he seemed a little uncertain. im tempted to find a local shop with a pulse pick up and check or put up the money and get one.

by **RSWORDS** » Thu Jun 18, 2009 5:04 am

BC847 wrote:Bobby, seriously, you'll spend more time messing with the gear-case cover than advancing the IP.

I know david, I just need to go pound a couple cold ones and have at it! I have a tendency of over thinking things before I dive into them. Then I have a couple beers and all teh pre-planning goes out teh window. Its worked so far! :lol:

by **BC847** » Thu Jun 18, 2009 5:32 am

RSWORDS wrote:Thanks pete, I found one, so if I'm thinking correct I need to pull the front cover, pull this gear and rotate it and teh pump shaft one tooth clockwise. Correct? I still dont understand why I'm having issues with this.

Just so it's been said, the gear with the red arrow is in fact the accessory drive gear for the vacuum pump / power steering.

The gear for then IP is the big one at the top of the image.

by **RSWORDS** » Thu Jun 18, 2009 5:40 am

by **PToombs** » Fri Jun 19, 2009 6:11 pm

Yeah Bobby. Clockwise is the hot ticket. I had to look at it and think about it 3 times before I was sure. :oops:

I need more beer too!

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