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Car Forum / MINI / May 20041300 head to 998 block?
Is it possible to fit a 1300 MG head to a 1991 998cc block without any major problems? yes as the valves will hit the piston(when at TDC) / block the 998 block will need pockiting not to deep as not to interfear with the rings > Is it possible to fit a 1300 MG head to a 1991 998cc block without any major > problems? > yes as the valves will hit the piston(when at TDC) / block > the 998 block will need pockiting not to deep as not to interfear with the > rings Hi, There will also be the question of compression ratio as the chambers in the 1275 block are larger than the 998 . Keith > > Is it possible to fit a 1300 MG head to a 1991 998cc block without any > major > > problems? > Is it possible to fit a 1300 MG head to a 1991 998cc block without any major > problems? Yes. It's also possible to have very major problems. Depending on the block, the head, the weather the morning each was manufactured and how kind the gods are feeling on the day you assemble it, the valves may or may not clear the cylinder walls. There are also some issues about cooling passages and which head gasket to use. If it all fits together and if the resultant compression ratio isn't silly, it can work very well. > Is it possible to fit a 1300 MG head to a 1991 998cc block without any major > problems? I built a heavily modified 998cc and used an alloy 1300 'size' head wayyyyy back in the 1980s... It can be done, but as has been said you need to check where/if the valves will hit the block - I did this while building the engine using 'engineers blue' and no head gasket, turning the engine over by hand... As mine wasn't quite a true 1300 head I was able to just very carefully file away the top of the block until they cleared, so its best if you can strip the engine and clean it all after removing the metal - not recommended to do it in situ! The engine went very very well and the car was quicker than my brothers Mk3 Cooper S! It had a 13.5:1 compression - but even using a Cooper S gasket it used to blow them between the 2 middle cylinders every 20,000miles! Have fun!! Andrew Murray Mini Owners Club Limited Editions Register http://www.minilimitededitions.co.uk I did I, about five years ago, to my then standard city E. Off come the head on whent an MG 1300, using the metro carb, manafold and down pipe. I did machine pockets into the block to stop the MG values hitting it. The car whent like stink.  SignatureRocky ----- http://sail.to/dune1x ----- "One direction is as good as another"- Saying of the open sand > > Is it possible to fit a 1300 MG head to a 1991 998cc block without any > major [quoted text clipped - 21 lines] > Mini Owners Club Limited Editions Register > http://www.minilimitededitions.co.uk How do I machine the pockets into the block?? Can I do this at home or have to take it to a machine shop to get this done?? Im getting more and more interested in doing this now > I did I, about five years ago, to my then standard city E. Off come the head > on whent an MG 1300, using the metro carb, manafold and down pipe. I did [quoted text clipped - 39 lines] > > Mini Owners Club Limited Editions Register > > http://www.minilimitededitions.co.uk hello, just put the whole 1275 motor in, :-), or re con & mod before fitting, the metro 1275cc A+ units can still be found very cheap, insurance wise it will probably be similar, Steve, > How do I machine the pockets into the block?? > [quoted text clipped - 52 lines] > > > Mini Owners Club Limited Editions Register > > > http://www.minilimitededitions.co.uk |
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