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| crank shafts https://slantsix.org/forum/viewtopic.php?t=10063 |
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| Author: | blauchlin [ Mon Aug 09, 2004 9:39 am ] |
| Post subject: | crank shafts |
did cranks come under sized from the factory |
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| Author: | mnecaise [ Mon Aug 09, 2004 9:47 am ] |
| Post subject: | |
yes |
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| Author: | Doctor Dodge [ Mon Aug 09, 2004 10:51 am ] |
| Post subject: | |
When the factory uses undersize / oversize parts in an engine they stamp a code into the block, up by the ID number. DD |
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| Author: | blauchlin [ Mon Aug 09, 2004 11:20 am ] |
| Post subject: | crank |
is there any way of decodeing the numbers. thanks |
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| Author: | Doctor Dodge [ Mon Aug 09, 2004 9:36 pm ] |
| Post subject: | Re: crank |
Quote: is there any way of decodeing the numbers.
The codes are in the form of shapes, numbers and letters stamped into the ID Pad.thanks It is important to know the year of the engine because the symbols changed over the years. Example: A 1966 SL6 with undersize crank journal(s) (from the factory) will have a Maltese Cross stamped into the ID pad followed by M-1-2-3 etc. indicating main journals #1,2,3 are undersize by .001. R-1-2-3 etc. indicate which rod journals are undersize. A Maltese Cross followed by an "x" indicates that the journals are .010 undersize, M-10 means all mains are .010 u/s and R-10 would mean all rod journals are .010 u/s There are other letters and shapes to indicate over / undersize cylinder bores, tappet bores etc. All this is spelled-out in the service manual for that year of engine. One thing I have learned over the years is that this is just reference info., you need to check / measure the actual parts for their size before buying replacement bearings, rings, lifters etc. DD |
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