Timing issue

78Delta88

Royal Smart Person

Supporting Member

May 23, 2022

1,541

1

1,361

113

SW Arizona

• Wednesday at 7:15 PM

• #11

I know might be a bit pricey, yet would be good idea to get a boresight camera down the hole and look at the gear on the cam. I just looked at the harbor freight unit, $84 here in Arizona.

Typically once gears start to wear they will continue to wear in the direction and method of the previous problem. So you can go with the melonized or a bronze gear, as the melonized is suggested but if the cam gear is bad or damaged it will continue to wear as such.

 

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melloelky

Comic Book Super Hero

Oct 22, 2017

4,498

10,538

113

45

mass

• Wednesday at 8:20 PM

• #12

That's how my bronze gear looked after one year.i can't say if I experienced any fluctuation in timing but it was reason enough for me to change to the melonized gear.the pro billet's shafts .500" btw.

 

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Coltrane

Greasemonkey

Jul 6, 2020

139

268

63

37

• Wednesday at 8:38 PM

• #13

One more question (I'll be calling Holley tomorrow to ask specifically) but my current gear only has one roll pin hole but this comp gear (pictured here) has 2 - is that just because this is a "universal" one? Or do I specifically need one with only 1 hole (the Summit brand has only 1)

 

Ernest

G-Body Guru

Apr 28, 2016

952

1,486

93

55

Texas

• Wednesday at 8:53 PM

• #14

Its not two holes... the one towards the bottom is for the roll pin, the one towards the gear is a dimple, its to align it with the rotor tip, the gear has to installed a certain way.

 

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Coltrane

Greasemonkey

Jul 6, 2020

139

268

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• Wednesday at 9:09 PM

• #15

Ernest said:

Its not two holes... the one towards the bottom is for the roll pin, the one towards the gear is a dimple, its to align it with the rotor tip, the gear has to installed a certain way.

Click to expand...

🤦🏻‍♂️ doh! (Thank you!) i knew there was supposed to be an alignment dimple but that looked like 2 holes

 

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melloelky

Comic Book Super Hero

Oct 22, 2017

4,498

10,538

113

45

mass

• Thursday at 3:52 AM

• #16

The finish on that gear also signifies that it's a melonized part,a buddy of mine was parting out a 2000s era S10 the distributor gear out of that looked just like that,it was the smaller of the 2 diameters though. So I was in your shoes with this gear situation just over a year ago and I could not get a solid answer out of MSD or holley whatever the hell it is now about what gear make up came on that distributor. The guy on the phone he seemed kind of shaky about the answer steel or iron( and it's not his fault I understand he's only telling me what he's told)and I emailed the question and got a conflicting answer so melanized was the way to go. I've since pulled the motor apart and that gear has no wear.

 

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B

bracketchev1221

Royal Smart Person

Jan 18, 2018

1,518

1,850

113

50

• Thursday at 6:59 AM

• #17

Its worn, Not sure it is 20 degrees timing worn, but start there.

 

Pontiac455

Master Mechanic

Jun 8, 2010

474

78

28

• Thursday at 8:35 AM

• #18

I would be checking the Harmonic Dampener to see if the timing marrk has moved or is moving.... If it were the gear the timing would fluctuate under load it wouldn't keep retatding....

 

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Rt Jam

G-Body Guru

Mar 30, 2020

669

719

93

56

Ontario Canada

• Thursday at 9:32 AM

• #19

35 to 25 will not make an engine cough, stutter and die.

 

Coltrane

Greasemonkey

Jul 6, 2020

139

268

63

37

• Thursday at 9:39 AM

• #20

Rt Jam said:

35 to 25 will not make an engine cough, stutter and die.

Click to expand...

Maybe I read it wrong and it was actually even lower? Soon as I moved it back to 35ish it ran perfectly.