How does one clearance a connecting rod? I've seen some talk over at 4cycle about clearance on a predator 212 rod being too tight and seizing up at high rpm. The consensus seems to be that the ideal clearance between the rod and crank is. 0025.
Clearance a Rod?
- Thread starter Arrowking
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OzFab
Well-known member
fowler
New member
There is a few ways
But plasti gauge is the easiest/ cheapest method
But plasti gauge is the easiest/ cheapest method
fowler
New member
Nope
U buy that plastiguage
U break off a little bit
U place it across the big end bearing
U torque the main cap back up
Remove the main cap
Use the measuring gauge on the packaging to measure the width of the plastiguage
That measurement is the oil clearance
Why are u doing this?
Do u suspect issues or did u just do a rebuild?
Or are u just interested?
U buy that plastiguage
U break off a little bit
U place it across the big end bearing
U torque the main cap back up
Remove the main cap
Use the measuring gauge on the packaging to measure the width of the plastiguage
That measurement is the oil clearance
Why are u doing this?
Do u suspect issues or did u just do a rebuild?
Or are u just interested?
I mostly just interested in it. Also I'm waiting a new clutch so I need an excuse to open my engine back up and keep away the boredom! Thanks for that info! Here's a really helpful link I found too, if anyone else is interested: http://underthehood.mahleclevite.com/?p=618
fowler
New member
That's good info
Good to note
Make sure u don't put the plastiguage over the oil journal
That will end really bad
And u will need the appropriate sized plastiguage
That stuff Fabroman put up isn't quite right
U need something that ranges each side of your spec
Good to note
Make sure u don't put the plastiguage over the oil journal
That will end really bad
And u will need the appropriate sized plastiguage
That stuff Fabroman put up isn't quite right
U need something that ranges each side of your spec
OzFab
Well-known member
I knew that, I only put that up coz it was close to appropriate, just to give an idea of the product...
Doc Sprocket
*********
The plastigauge is a good, accepted method of checking clearance, but to actually adjust the clearance, bring your wallet to a machine shop. You're not going to do it with sandpaper if you like your engine.
fowler
New member
Or u can buy different sized bearings
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