Crank Sensor getting tore up by Reluctor Wheel
05-30-2010, 02:47 PM
#1
Crank Sensor getting tore up by Reluctor Wheel A friend of mine has a 6.0 block with a 4.0 stroke Scat Crank, the Reluctor Wheel on the Crank is tearing up the Crank Sensor. So far we've gone through 2 of them.
Could the Reluctor have been made off-center or possibly too large of a diameter?
We are getting another Sensor and shimming it to see if it makes a difference, or to possibly find out what the problem is.
Could the Reluctor have been made off-center or possibly too large of a diameter?
We are getting another Sensor and shimming it to see if it makes a difference, or to possibly find out what the problem is.
05-30-2010, 08:37 PM
#2
Crank walking? There was an issue about this with Scat cranks.
From another site:
http://www.hardcorels1.com/vbulletin...ad.php?p=36123
There was no note enclosed with the crankshaft stating it would not accept the proper LS1 flywheel bolts.
I had to find this out on the internet from, among others, Erik Koenig, one of the most respected engine builders in the country.
It has been stated on LS1tech.com that SCAT produced a "batch of bad crankshafts with the wrong thread size" for the flywheel bolts.
Also, the issue was raised, and confirmed again by Mr. Koenig, that there was a problem with the "thrust walls" being too short where they contact the thrust surfaces of the #3 main bearing in these LS engines. Apparently the "thrust wall issue" was prevalent with many of the SCAT cranks that had the wrong threads tapped into them for the flywheel bolts.
So, the upshot of all of this is:
-I have a set of $26.00 ARP flywheel bolts that I cannot use.
-I have to purchase yet another set of flywheel bolts (7/16-20), and guess at the ARP part #, and hope I order the right ones.
-since my engine is already assembled, I have to "hope" that the thrust walls are tall enough to prevent "crank walking" and premature engine failure.
From another site:
http://www.hardcorels1.com/vbulletin...ad.php?p=36123
There was no note enclosed with the crankshaft stating it would not accept the proper LS1 flywheel bolts.
I had to find this out on the internet from, among others, Erik Koenig, one of the most respected engine builders in the country.
It has been stated on LS1tech.com that SCAT produced a "batch of bad crankshafts with the wrong thread size" for the flywheel bolts.
Also, the issue was raised, and confirmed again by Mr. Koenig, that there was a problem with the "thrust walls" being too short where they contact the thrust surfaces of the #3 main bearing in these LS engines. Apparently the "thrust wall issue" was prevalent with many of the SCAT cranks that had the wrong threads tapped into them for the flywheel bolts.
So, the upshot of all of this is:
-I have a set of $26.00 ARP flywheel bolts that I cannot use.
-I have to purchase yet another set of flywheel bolts (7/16-20), and guess at the ARP part #, and hope I order the right ones.
-since my engine is already assembled, I have to "hope" that the thrust walls are tall enough to prevent "crank walking" and premature engine failure.
05-31-2010, 08:56 AM
#4
was your block machined? mains honed? ive heard of horror stories where the machining moved the crank up in the block and then covers leak and chains are too loose ect... I cant remember if the sensor sits at a true 90 deg from the reluctor of if it sits just slightly higher and a moved crank centerline would cause contact... otherwise I would say the wheel is just too big in general
