Fish13 Posted April 11, 2009 Share Posted April 11, 2009 Folks, No discernable engine number... I'm measuring the bores of an 'unknown' block and need to know if the measurement of the bore (i.e. 94mm for a Rover V8 3.9) is excluding the cylinder liner, or taken from down inside the liner? The difference between measuring from the outside edges of the cylinder liner side to side and measuring from down the bore inside the liner side to side is about the same difference in measurement of a 3.5 (88.9mm) to a 3.9 (94mm)! Please help. Cheers, Fish. Quote Link to comment Share on other sites More sharing options...
Escape Posted April 11, 2009 Share Posted April 11, 2009 Folks,No discernable engine number... I'm measuring the bores of an 'unknown' block and need to know if the measurement of the bore (i.e. 94mm for a Rover V8 3.9) is excluding the cylinder liner, or taken from down inside the liner? The difference between measuring from the outside edges of the cylinder liner side to side and measuring from down the bore inside the liner side to side is about the same difference in measurement of a 3.5 (88.9mm) to a 3.9 (94mm)! Please help. Cheers, Fish. You want to measure the bore to determine displacement, so you need to take the measurement at the inside. So I'm guessing you've got a 3.5 (89mm). Quote Link to comment Share on other sites More sharing options...
steve_d Posted April 11, 2009 Share Posted April 11, 2009 The engine number should be stamped on the block just above the dipstick unless it is a very early engine as I think some had the number at the back of the block above the bell housing joint. Would help a lot to have the number as they came in different compression ratios (which may also be stamped with the engine number). Steve Quote Link to comment Share on other sites More sharing options...
Fish13 Posted April 13, 2009 Author Share Posted April 13, 2009 Thanks for the help guys, looks like it's a 3.5. Cheers, Fish. Quote Link to comment Share on other sites More sharing options...
steve_d Posted April 13, 2009 Share Posted April 13, 2009 Have you found the engine number? It will be a great help as it can be 'read' to help ident its age etc. Steve Quote Link to comment Share on other sites More sharing options...
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