Distributor gear question 454 to 502.
#11
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http://i39.photobucket.com/albums/e1...hVfBJ-MJpf.jpg
#12
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I have two of the same engines. I just ordered new cams with cast PRESSED on gear and fuel pump lobes.
These are steel camshafts that need gm part #10456413.
If you had a roller cam before you will be fine.
These are steel camshafts that need gm part #10456413.
If you had a roller cam before you will be fine.
#13
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Join Date: Mar 2009
Location: somewhere between paso & LA
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X2!!! IF ya had a factory hyd. roller before, your good to go,
whatever you do, don't go to the parts store and buy a
replacment-cuz I guarantee the "professionals" at pepboys
ain't gonna have a clue, and would give you the wrong part!
the gm roller gear is melonized, aftermarket"auto stores"
probably wouldn't have it anyway.
whatever you do, don't go to the parts store and buy a
replacment-cuz I guarantee the "professionals" at pepboys
ain't gonna have a clue, and would give you the wrong part!
the gm roller gear is melonized, aftermarket"auto stores"
probably wouldn't have it anyway.
#14
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Thread Starter
X2!!! IF ya had a factory hyd. roller before, your good to go,
whatever you do, don't go to the parts store and buy a
replacment-cuz I guarantee the "professionals" at pepboys
ain't gonna have a clue, and would give you the wrong part!
the gm roller gear is melonized, aftermarket"auto stores"
probably wouldn't have it anyway.
whatever you do, don't go to the parts store and buy a
replacment-cuz I guarantee the "professionals" at pepboys
ain't gonna have a clue, and would give you the wrong part!
the gm roller gear is melonized, aftermarket"auto stores"
probably wouldn't have it anyway.
Next...Shold i unplug the knock sensor module, and replace my ignition module so i dont have a rev limiter at 4700, its too low for the 502, coming from my old 330hp 454.
Im 99 percent sure i had a roller but dont know, the parts fieche shows a rollor cam but who knows, Merc does weird things.
here are my numbers
merc ser number OK199057
casting number 10237297
#15
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Thread Starter
merc ser number OK199057
casting number 10237297[/QUOTE]
This gear stuff is driving me nuts!! Bought a melonized gear from GM and it wouldnt fit with out removing the washer between the gear and distributor tube.
I Just want to know 100% that THUNDERBOLT V IGNITIONS already use a hardened gear so I wont ruin my Brand New motor.
I ended up putting my old gear back on from my 1996 454 gen VI with Thunderbolt V ignition.
Im just still not sure. I have read every thread here and other site and still no FOR SURE answer.
Want to run the new 502 this weekend...
casting number 10237297[/QUOTE]
This gear stuff is driving me nuts!! Bought a melonized gear from GM and it wouldnt fit with out removing the washer between the gear and distributor tube.
I Just want to know 100% that THUNDERBOLT V IGNITIONS already use a hardened gear so I wont ruin my Brand New motor.
I ended up putting my old gear back on from my 1996 454 gen VI with Thunderbolt V ignition.
Im just still not sure. I have read every thread here and other site and still no FOR SURE answer.
Want to run the new 502 this weekend...
Last edited by ballon78; 03-31-2010 at 08:04 AM.
#16
Registered
I spent 15 minutes talking to Bob Mandra yesterday about this.
Call him and he will shed some light on the topic.
I ordered two new cams from him, and he sent me two new gears to go with the cams.
Call him and he will shed some light on the topic.
I ordered two new cams from him, and he sent me two new gears to go with the cams.
#17
Charter Member # 55
Charter Member
You are making this way too complex.
It doesn't matter whether your 454 was a roller cam or not. Either way, in a Merc engine, it has the same distributor gear.
Just verify with 1800runsnew that the cam in your new engine has a pressed on steel gear.
If so, you are good to go and can run your distributor as is.
It doesn't matter whether your 454 was a roller cam or not. Either way, in a Merc engine, it has the same distributor gear.
Just verify with 1800runsnew that the cam in your new engine has a pressed on steel gear.
If so, you are good to go and can run your distributor as is.
#18
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Thread Starter
You are making this way too complex.
It doesn't matter whether your 454 was a roller cam or not. Either way, in a Merc engine, it has the same distributor gear.
Just verify with 1800runsnew that the cam in your new engine has a pressed on steel gear.
If so, you are good to go and can run your distributor as is.
It doesn't matter whether your 454 was a roller cam or not. Either way, in a Merc engine, it has the same distributor gear.
Just verify with 1800runsnew that the cam in your new engine has a pressed on steel gear.
If so, you are good to go and can run your distributor as is.
When i peak at the cam gear it look black in color compared to the shiny cam and lobes.
How do i tell the cam gear material just by looking at it?? Is there a way?
#19
Registered
The reason Bob had to send me two new gears was because my original engine was a flat tappet, they do have different gears.
If I wanted to wait two weeks I could have a cam ground and a cast gear pressed on. There is a shortage in the cast gears since Crane when out of business.
Go look at some other sites than 1800.runs.new they advertise what gear you need. Thats the part number I posted.
I will see if I can post a pic of your cam. I have two sitting in my shop from the ones I removed. Its a steel one piece cam, the gear is not a press on.
If you call Bob Mandra he will explain all the different cores and the differences.
If I wanted to wait two weeks I could have a cam ground and a cast gear pressed on. There is a shortage in the cast gears since Crane when out of business.
Go look at some other sites than 1800.runs.new they advertise what gear you need. Thats the part number I posted.
I will see if I can post a pic of your cam. I have two sitting in my shop from the ones I removed. Its a steel one piece cam, the gear is not a press on.
If you call Bob Mandra he will explain all the different cores and the differences.
#20
Platinum Member
Platinum Member
Thread Starter
The reason Bob had to send me two new gears was because my original engine was a flat tappet, they do have different gears.
If I wanted to wait two weeks I could have a cam ground and a cast gear pressed on. There is a shortage in the cast gears since Crane when out of business.
Go look at some other sites than 1800.runs.new they advertise what gear you need. Thats the part number I posted.
I will see if I can post a pic of your cam. I have two sitting in my shop from the ones I removed. Its a steel one piece cam, the gear is not a press on.
If you call Bob Mandra he will explain all the different cores and the differences.
If I wanted to wait two weeks I could have a cam ground and a cast gear pressed on. There is a shortage in the cast gears since Crane when out of business.
Go look at some other sites than 1800.runs.new they advertise what gear you need. Thats the part number I posted.
I will see if I can post a pic of your cam. I have two sitting in my shop from the ones I removed. Its a steel one piece cam, the gear is not a press on.
If you call Bob Mandra he will explain all the different cores and the differences.
Called Bob today , he said that if my old motor was a roller motor than im fine........
Its just So many people are telling me different things that i dont know what to do. Seems to me that my stock merc Thunderbolt V gear should work fine if it worked on my gen 6 454 330hp.......
1BIGJIM see if you can get some close up picks of the gear on the cams. Mine looked black in color...was your like that?