how to check for crank Straightness?
Thread Starter
Staging Lane
Joined: Jan 2020
Posts: 56
Likes: 2
From: Grand Rapids, MI
how to check for crank Straightness? Unfortunately,my LS2 crank has fallen from about 2.5 feet. When this happened,it looked like it fell pretty evenly . Is there a way I can check for straightness ? Can I put it in the block and see how it spins ? I feel the crank is fine but I’m no expert and looking for second opinions
Thread Starter
Staging Lane
Joined: Jan 2020
Posts: 56
Likes: 2
From: Grand Rapids, MI
This. You’ll want to only install bearing one and five. Leave the middle 3 out, when measuring it. Don’t set the caps on. Use a little oil on one and five. You won’t have to turn it very much to determine if it’s bent or not.
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Teching In
Joined: Jun 2021
Posts: 36
Likes: 6
You did look it over for cracks right? Prussian blue is a cheap step to give peace of mind after checking straightness. I saw an engine (ford?) with a busted crank recently. Consensus was failure to balance it but I can only imagine what a 30” drop onto concrete could do.
You did look it over for cracks right? Prussian blue is a cheap step to give peace of mind after checking straightness. I saw an engine (ford?) with a busted crank recently. Consensus was failure to balance it but I can only imagine what a 30” drop onto concrete could do.
Teching In
Joined: Jun 2021
Posts: 36
Likes: 6
Don’t want to hijack the thread I was taught by a retired usn shipwright this trick. It works really well.
from Permatex:Inspection
Permatex Prussian Blue can also be used for general inspection purposes. The paste can be applied to a surface to reveal small cracks, pits or other surface defects that may affect the part's performance. This is especially useful in the automotive or aerospace industries, where stuff must be thoroughly inspected for any signs of wear and tear. Using Permatex Prussian Blue for inspections offers the ability to visually identify and correct small defects that would otherwise be difficult to see.
from Permatex:Inspection
Permatex Prussian Blue can also be used for general inspection purposes. The paste can be applied to a surface to reveal small cracks, pits or other surface defects that may affect the part's performance. This is especially useful in the automotive or aerospace industries, where stuff must be thoroughly inspected for any signs of wear and tear. Using Permatex Prussian Blue for inspections offers the ability to visually identify and correct small defects that would otherwise be difficult to see.
Last edited by Che70velle; Nov 2, 2023 at 12:16 PM. Reason: Removed a non-sponsor link…