Results 1 to 1 of 1
-
09-29-2007, 06:50 AM #1
- Join Date
- Aug 1999
- Location
- Arizona
- Posts
- 51,364
Black- 383 Procharged & N20 Vert
Main Bearing Clearance - Cranky Dispositon
Main Bearing Clearance - Cranky Dispositon
At the heart of your powerplant is the crankshaft, and this baby not only has to endure the entire rotating mass, but it is subjected to countless spin cycles at varying rpm. It's a tough life, which makes proper installation that much more critical. It's nothing tricky, but taking the time to check tolerances can be the difference between a long -running powerhouse and a short-lived paperweight.
But what is it about bearing clearances that's so important? Simply put, if the main bearings are too tight, they'll burn up, and, conversely, if the clearances are excessively loose, you'll end up with a big drop in oil pressure at operating temperature. Let's not forget about the thrust tolerances. If you don't have enough crank endplay, you could burn the thrust up, which will eventually wear out the thrust on the crankshaft. If this should happen, you can expect to pony up some serious green for major reconstructive surgery, by having to reweld or even replace the crankshaft. All said and done, take the time to measure every journal on the crankshaft and each main bearing, and make sure to have your crank endplay in check.
The better it's matched the more you're freeing up available power. It's cheap insurance to know everything is working in unison and that the rotating assembly isn't fighting itself. We all know engines aren't cheap, so do it once, do it right the first time, and you won't have to worry about your mill giving up the ghost to a major catastrophe.
Photo Gallery: Checking Main Bearing Clearances - Chevy High Performance Magazine
Read More | Digg It | Add to del.icio.us
More...
Thread Information
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
Similar Threads
-
Veifying Main Bearing Clearance - Checked Mains - CHP Step B
By Ed Blown Vert in forum Camaro / SSReplies: 0Last Post: 11-10-2010, 03:20 AM -
Main bearing Side bolts
By cfgioja in forum Internal EngineReplies: 3Last Post: 09-05-2010, 07:09 AM -
Main bearing question?
By 1999sscamaro in forum Internal EngineReplies: 1Last Post: 08-06-2010, 01:20 PM -
Help: main bearing clearance ls1
By crossbredfoxbody in forum Internal EngineReplies: 4Last Post: 04-04-2010, 05:30 PM -
Main crankshaft bearing clearance-oil pressure
By tigersport14 in forum Internal EngineReplies: 6Last Post: 05-22-2007, 07:58 PM
Bookmarks