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Post by chris71 on Jan 9, 2017 20:57:22 GMT
Hi
Just about to start work on my car which came with a replacement engine due the last having let go, with the amount of rusted water around engine bay I'm guessing a gasket of some sort was the cause.
Anyway the new 2nd hand engine in now runs sweet as a nut but I've got know idea what it is. Where do I look to find this out and what codes mean what ?
Many thanks.
Chris
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Post by atlex on Jan 9, 2017 21:16:39 GMT
photo needed ?
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Post by FFS Corders on Jan 10, 2017 18:21:38 GMT
as above
is it a mk1/mk2/mk3? is the engine from a mk1/mk2/mk3? what size?
wikipedia gives a fair amount of info on the engines used by mx5's which you can start from
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Post by atlex on Jan 10, 2017 18:38:42 GMT
just dump the numbers you have. also the V5 should mention the engine number of the original and ... etc.
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Post by Rickster on Jan 10, 2017 19:08:16 GMT
Hi Just about to start work on my car which came with a replacement engine due the last having let go, with the amount of rusted water around engine bay I'm guessing a gasket of some sort was the cause. Anyway the new 2nd hand engine in now runs sweet as a nut but I've got know idea what it is. Where do I look to find this out and what codes mean what ? Many thanks. Chris The engine in your pic is a one horsepower dobbin!!!!
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Post by martiny on Jan 11, 2017 11:59:15 GMT
as above is it a mk1/mk2/mk3? is the engine from a mk1/mk2/mk3? what size? wikipedia gives a fair amount of info on the engines used by mx5's which you can start from Strictly speaking we haven't yet established that the car is an MX-5. I'm waiting for the random photo of an Austin Montego with a Peugeot engine in it.
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Post by chris71 on Jan 14, 2017 18:10:01 GMT
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Post by lowender on Jan 14, 2017 18:18:27 GMT
Well it's definitely a 1.6.
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Post by chris71 on Jan 14, 2017 18:28:23 GMT
OK. How can I tell if its UK spec or JDM spec. Apparently there is a big difference on power output (90hp ish UK - 115 ish JDM.
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Post by lowender on Jan 14, 2017 18:33:29 GMT
UK 1.6 was 90bhp only from 1994 onwards. Up to then was same as JDM. Do you have any reason to suspect that this isn't the original engine?
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Post by chris71 on Jan 14, 2017 18:41:37 GMT
Yes I do because the car came with a replacement engine fitted as the original had let go. Like said at the beginning of the thread.
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Post by lowender on Jan 14, 2017 18:52:46 GMT
Oops, I'll just go and fetch my reading glasses.......
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Post by lowender on Jan 14, 2017 20:03:23 GMT
Engine number should be on the block, on a horizontal face just behind the inlet manifold, readable from above, but usually rather indistinct. I don't know if there are any obvious visual differences between a pre and post '94 uk 1.6 or Eunos engine I'm afraid.
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Post by martiny on Jan 15, 2017 14:16:08 GMT
As lowender said, it's certainly a 1.6 engine (CAS on the back of the inlet cam instead of the exhaust cam, distinctive inlet manifold with the thermal air valve on the side which wouldn't bolt up to a 1.8 engine) but there isn't an obvious way to say whether it's a 115hp early engine or a 90hp later one other than the engine number stamped on top of a flat spur that sticks out from the rear of the engine block on the inlet side (vs exhaust side on a 1.8). Not sure how to interpret the engine number to get a date, other than to compare it with others of known age.
Anyway, what we can say is that the crank pulley on the front looks like it has 8 slots around the rim, and that indicates a revised engine with the longer crank nose. The earliest engines had 4 slots and they had a design weakness in the crank nose which let to a lot of failures. Changeover was some time in 1991 so that pulley is not original for your 1990 car. Of course it's possible that it's an even later '95-on engine but the pulley was swapped over from some other engine. I *think* the '95-on engine uses a 4-rib pulley for its alternator like the 1.8 engines do, but the 1.6's up to 1993 use a vee-belt for the alternator so need the appropriate pulleys.
My guess is it's most likely to be a 1992-3 115hp 1.6 engine.
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Post by exhausting on Jan 15, 2017 14:20:47 GMT
8 slot bottom pulley. Later engine, which in the uk wouldn't be a 115 but it could still be from a 115 import. The compression is different which could be depth gauged from a spark hole. I have never seen it done though, so can't offer any measurements. Perhaps the piston crowns are different. I can't think of any external clues
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