What to replace while engine is out

Topics related to the engines for the later MG Midget series.

What to replace while engine is out

Postby Kawazar » Sun Sep 26, 2004 5:07 pm

I am putting a used engine form a 78 Midget into my 76 midget. While it is out I am doing the oil pump, seals, gaskets and a clutch. Should I replace anything else while I am there? Bearings, rings? I don't want to get into boring and maching work. The engine runs fine with about 50K. Just looking to freshen it up.
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Postby dan » Mon Sep 27, 2004 12:10 pm

Boy, that's a tough call...once you open it up, it'd probably be worth doing all the bearings, but then if you do that, machine work also makes sense...

(Isn't that how it always goes? :) )

Certainly the oil pump makes sense, as does the clutch.

If you're looking to control costs, it's tough, but I"d also consider a timing setup (gears & chain).

Other ideas?

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Postby Kawazar » Mon Sep 27, 2004 7:42 pm

I was going to do the timing stuff as well. Can I do main and rod bearings without machining?
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Postby bugeye58 » Mon Sep 27, 2004 9:17 pm

That depends on whether the crank measures out within specs, as well as if the big ends of the rods check out for dimensions and concentricity.
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Postby Mike H » Wed Sep 29, 2004 3:55 pm

While the engine is out, I would suggest rod bearings, possible main bearings and thrust washers. All these are weak spots of the 1500 engine and are easy to replace while the oil pan is off to replace the oil pump.
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Postby bugeye58 » Wed Sep 29, 2004 8:26 pm

If nothing else, replace the thrust washers. They are a known failure point on the 1500. Many times you'll find them lying in the bottom of the pan.
Really cheap insurance. The oil pump is something I would replace as a matter of course, as well. As far as the rest goes, you'll have to make that call.
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