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| Rebuilding a 1275 https://ausmini.com/forums/viewtopic.php?f=5&t=9489 |
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| Author: | Harley [ Tue Jul 26, 2005 4:19 pm ] |
| Post subject: | Rebuilding a 1275 |
Hey, Soon to be starting on rebuilding my A+ engine, I need to look at what should be replaced whilst it's being done. I don't know what the average milage of the engines that are imported over here is, but I was considering a minimal bore increase, new pistons, cam (just thinking) and having the head converted for unleaded, though it will still run on high octane when finished. I'll also look at the condition of the bearings and decide what to do then (most likely replace), and rebuild with a new clutch, timing chain and electronic ignition. Hopefully this should get me a smooth reliable engine. What I haven't decided yet is how much work I want to do myself. I don't really have the cash to dump the engine somewhere and say 'go for it', and although I wouldn't mind taking it all apart and putting back together, it's not like I've done it before and have been advised to go woth the pros to ensure a bearing isn't fitted backwards or something and completely stuff my engine after a few short miles. Is what I have planned over the top, a good start or spot on to do, and what's recommended about who does the job? Thanks. |
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| Author: | drmini in aust [ Tue Jul 26, 2005 7:58 pm ] |
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That's a good start. I would add: new oil pump, regrind the crank (bet it needs it) duplex timing chain kit port the head a little while it's getting refurbished. What clutch & flywheel are you running? What about the gearbox.... is it a Metro one? Never fit a new motor without at least stripping the box for a look. And cleaning out all the crud, which will otherwise find its way into your shiny new engine... 
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| Author: | Harley [ Tue Jul 26, 2005 9:55 pm ] |
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I dont know really, but I'm 99% sure it's all metro. Is that good? What's the head port do? |
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| Author: | Lillee [ Tue Jul 26, 2005 10:06 pm ] |
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are you sure you want to rebuild this thing on your own?  What Doc means is to enlarge the intake and exhaust ports so the head breathes better. Might was well do it whil the head is off, worth it in terms of hp, trust me 
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| Author: | mini_van_1970 [ Tue Jul 26, 2005 10:35 pm ] |
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How many extra ponys could you expect with a bit of a port and polish? (1 or 2) or (10 or 20)? Pat |
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| Author: | drmini in aust [ Tue Jul 26, 2005 10:37 pm ] |
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Dunno much about Metro boxes except they have A+ gears and a Verto clutch (regarded by many as a POS), some (all?) are cable actuated. Need some mods to work in a Mini, and you may want to change the diff ratio too.. As I said, don't assume it's good to go. Strip, check & clean it out!
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| Author: | Harley [ Tue Jul 26, 2005 11:06 pm ] |
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Yeah, it looks like a heap of crap so I was going to completely strip it down and have it rebuilt. I'll have to look into the clutch and what drive it has, I would like it so it doesn't rev as high as 100 km/h. 3000 preferable. What diff would I need, and is there any other mods needed to make that work? |
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| Author: | Stuartminidlx [ Thu Jul 28, 2005 7:38 pm ] |
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ok here goes first all the work was carried out by LW parry in sydney ph 9599 2871 they gave me heaps of help and explained everything to me (this was the first time i had built an engine.) but my dad was a mech engineer and he said the machining was really good and was very happy. * chemical clean of engine and component $55 * messure check inspect & report $27 *remove and replace welsh and gallery plugs $39.60 *rebore and houn 4 cylinder to suit piston $148.50 *surface grind cylinder block face $59.40 *remove and relace cam bearings $36.30 *contour grind 8 cam followers faces $35.20 *demantel and rebuilt & align 4 piston and conrod $48.40 * bore and hone 4 conrod tunnels $66 *crack test 1 cylinderhead $27.50 *recondition & surface grind of 1 cylinderhead $148.50 * remove and replace ring gear (not part of engine rebuild) $27.50 * supply 1 set of pistons and piston rings $244.20 * 1 set of conrod bearings $63.80 * 1 set of main bearings $69.30 * 1 set of main bearings thrust $13.20 * 1 set of gallery and welsh plugs $33.00 * full engine gasket set (1275) $96.80 * 1 competition exhaust valve $46.20 * 1 ring gear $86.90 * remove and replace 4 exhaust valve guilds $22 *supply 4 exhaust valves $28.60 * 8 conrod nuts $44 *Delivery fee $5.50 price exclude GST TOTAL including GST $1499.30 I got the cam reground later at the same place for $121 including GST |
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