Guest pugpowa Posted February 20, 2006 my poor car has developed a bit of a bottom end knock and i've been offered a rebuilt 1.6 carb engine(done zero miles since rebuild) for considerably less than what it would cost for new bearings,regrind etc for the mi. i was just wondering if anyone knew whether the cranks were different at all? i wasnt sure if it was the conrods or the crank that was different in the two engine sizes. any help very much appreciated Share this post Link to post Share on other sites
Ryan 99 Posted February 20, 2006 The cranks are different between different engine sizes, as it's the crank which detirmies the stroke length. Share this post Link to post Share on other sites
Pierre_b 3 Posted February 20, 2006 (edited) Hello, my poor car has developed a bit of a bottom end knock and i've been offered a rebuilt 1.6 carb engine(done zero miles since rebuild) for considerably less than what it would cost for new bearings,regrind etc for the mi. i was just wondering if anyone knew whether the cranks were different at all? i wasnt sure if it was the conrods or the crank that was different in the two engine sizes. any help very much appreciated AFAIK, the crank are different between 1600 and 1900/1900 16s on 2 aspects : - stroke : 73mm for 1600 and 88mm on 1900/1900 16s - Rod bearing journal diameter : 45 on 1600 and 50 on 1600/1900 16s There is also a difference between 1900 and 1900 16s, the 16 has 8 counterweigth when the 8 has only 4 (not so sure about that, never disassembled a 16s). The conrod are different too (longer on the 1600). Pierre Edited February 20, 2006 by Pierre_b Share this post Link to post Share on other sites
Normski 1 Posted February 22, 2006 There is also a difference between 1900 and 1900 16s, the 16 has 8 counterweigth when the 8 has only 4 (not so sure about that, never disassembled a 16s). Pierre Yes, that is correct. Mi16 crank is fully counter weighted, and is stronger than the 8v crank. Share this post Link to post Share on other sites
Guest pugpowa Posted March 1, 2006 thanks for all your advice people! ive had it all apart,loose capnut on the conrod,number 3 cylinder from the flywheel end being number 1,crank isnt damaged, so its just gonna be big end bearings. been quoted £35 for the set.so we'll see how she go's, strange thing was,there was no bits of metal in the oil, or floating around in the thin layer of gunk in the sump.bearing didnt seem scored or anything,but just kinda thinned in the middle! lucky escape i hope! Share this post Link to post Share on other sites
Normski 1 Posted March 3, 2006 I've just noticed your rev-limit Might be an idea to fit a set of ARP conrod bolts while you are replacing the bigend bearings. Share this post Link to post Share on other sites
petert 554 Posted March 5, 2006 I've just noticed your rev-limit Why would you rev it past 7200 if it only makes 179hp? Share this post Link to post Share on other sites
Guest pugpowa Posted March 7, 2006 it wasn't me who set the rev limit, so i'm not sure why its so high, but all i do know is that it pulls like a biatch all the way to the end! probably why it broke tho! Share this post Link to post Share on other sites
