301 valve timeing

ericsegaline · Feb 21, 2015

Finding two sets of dots on the cam gear not sure witch ones to use any help would bee nice

David G · Feb 21, 2015

Not familiar with that model, but I would think there would be one on the crank gear to match up with.

ericsegaline · Feb 21, 2015

there is but the crank gear has one dot and 2 dots witch one do I use motor was apart when I got it

Bob · Feb 21, 2015

First you said the CAM gear has two sets of marks, now you say the CRANK gear has two sets of marks. Which is it, or BOTH?

mazemeister · Feb 21, 2015

without knowing anything about your dilemma as it applies to that particular engine, I would guess that the cam gear has one type of mark to time it to the crank and another set of marks to time to the distributor drive. examining the mating gears should make it clear which is which.

fastfarmall · Feb 21, 2015

the way i see it, the marks on the cam gear are essentially the same, and since the cam turns half as fast as the crank, use either one of the double dots, and the use the double dots on the crank gear, If the cam had a [two sets] of single dots, then u would use the single dot on the cranks gear, or did i miss something, but i never worked on a 301 either !!

fastfarmall · Feb 22, 2015

Disregard my previous post, that doesn't make sense either ! This is one for Pete 23, or Gene Bender or _____.

ericsegaline · Feb 22, 2015

just the crank gear sorry for confusion the crank gear has a single dot and 2 dot and the cam gear has two single dot when I line the two single dot witch are male too female when you match teeth cam seems out of time when I set it too the two dots on crank and one of the single dots on cam they don't line up good seem like they can go one tooth ether way but the cam seems more in time just want to make sure it is write

David G · Feb 22, 2015

Are the cam dots on two teeth that are next two each other, if so the crank dot goes between them.

teddy52food · Feb 22, 2015

Turn the crank to where #1 would be on TDC. look at the cam lobes on #1 & they will be down. See which marks are close & install there.

Bob · Feb 22, 2015

OK... I'm gonna GUESS the crank gear is the same as a diesel (D282, for example) would use, and the extra set of marks are to match up with the injection pump drive idler on the RH side of the engine. (Conventional RH side.)

So if you are FACING the front of the engine, the unused set of marks will be at the LH side, and the correct marks for the cam drive will be to your right. Like THIS:

<img src = "http://i167.photobucket.com/albums/u125/27Grainfield/IH/301_zps81f8e731.jpg">

Make sense?

pete 23 · Feb 22, 2015

Follow Teddy's directions and you can't go wrong. There are two sets of marks on the crankshaft gear because on a diesel engine you have to time the idler gear. On a gas engine you do not. The single dot on crank gear aligns with single dot on cam gear. The double dot on crank gear would be the marks you align with idler gear on a diesel engine.

David G · Feb 22, 2015

Ah, that makes sense to me.

ericsegaline · Feb 22, 2015

Thanks that's what I was looking for

301 valve timeing

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