I found it! Beware B&M Flexplates
#1
I found it! Beware B&M Flexplates
So I posted last weekend about my broken Flexplate. I ordered a B&M SFI rated flexplate through Summit. Before replacement I had an intermittent pinging/tinging whatever. After installation of the new plate, the noise was louder, more metallic and consistent.
I started the truck 4-5 times, let it run for a few seconds then turned it off. Took the tranny out and could not find ANYTHING.
last night I put the tranny back in. I left the torque converter un bolted. I started it, same noise. I let it run for a bit. Definitely not in the tranny, definitely not flat or solid enough to be a rod knock. HAS to be the starter, so I started looking.
I don't know how the hell I spotted it with everything installed, but the flexplate is hitting the starter bearing in the front, where the gear comes out and stops.
the B&M flexplate is about 2-3mm too large in diameter.
Here it is lined up with the GM plate
you can see here it's barely starting to wear the starter bearing on the back half
Here i where I spotted it, in the black void (cant be seen in the pic)
Here is the bearing more worn now. The flexplate was hammering it, not scraping it
Here is a video of the sound
20130419_192321 - YouTube
I started the truck 4-5 times, let it run for a few seconds then turned it off. Took the tranny out and could not find ANYTHING.
last night I put the tranny back in. I left the torque converter un bolted. I started it, same noise. I let it run for a bit. Definitely not in the tranny, definitely not flat or solid enough to be a rod knock. HAS to be the starter, so I started looking.
I don't know how the hell I spotted it with everything installed, but the flexplate is hitting the starter bearing in the front, where the gear comes out and stops.
the B&M flexplate is about 2-3mm too large in diameter.
Here it is lined up with the GM plate
you can see here it's barely starting to wear the starter bearing on the back half
Here i where I spotted it, in the black void (cant be seen in the pic)
Here is the bearing more worn now. The flexplate was hammering it, not scraping it
Here is a video of the sound
20130419_192321 - YouTube