So im rebuilding my M20(gaskets, seals, o-rings, etc.). Just took apart the head on monday to get it crack checked,cleaned, resurfaced this weekend. I just wanted to get a few thoughts on what i need to get to keep my M20 durable and running strong. Already getting the Upper and lower gasket sets from eeuroparts.com . Thanks in advance!
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What you are doing is a refresh, not a rebuild.
In addition to what you're I'd look closely at the cam/rockers/rocker shafts, replace main and rod bearings (have crank checked out), inspect the oil pump, soak and clean the oil sprayer bar, have the valve springs tested.
I'm sure there's more, it's just late. Best of luck with the project. -
Do you have the engine pulled or just the head pulled from the engine? This will let us know how far you can go with your skill set and tool set, those last 2 would be decent to throw in as well so everyone knows a little more about the question in general. No disrespect intended :)sigpic87 325E The Honey BadgerComment
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This. Super easy and worth it. But I'd only replace the crank and main bearings if they were causing issues or it had been run really low on oil. They're an extra few hundred dollars that may not be needed, unless you are gonna put another couple hundred thousand miles on it. I'm also a really cheap redneck.Originally posted by Andy.BComment
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Unless it has less than 50k miles, valve guides and stem seals and a valve job
won't be money wasted.
Likewise, rings... which usually grows into 'pistons and rings'
tnow, sometimes I just mess with people. It's more entertaining that way. george gravesComment
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The motor is already pulled out and on a stand, just recently took the head apart and need to test the springs and clean the valves and check for any scoring. Wasnt planning on taking the block apart, but now it seems like its a better idea to take it apart and inspect everything. I have no idea how many miles are on the block, picked it up from a pick n pull in the bay area. Planning on DD'ing it so ill be putting plenty of miles on it. Anyone know where i can find a specification sheet for clearances and sizes for the motor and where i can get affordable parts for a broke college student? and which part is the oil spray bar?sigpicComment
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Oil spray bar is on the head across the top of the cam to oil the lobes and rockers, looks like a brake line.
I believe the rod bearing caps have torque to yield bolts, which means you have to replace them when you remove them. And those fuckers aren't cheap. I'd just check the rotating assembly by feel and if it feels anything other than perfectly smooth, re build it. Main bearings are $100, rod bearings are $80, $60 for rod cap bolts, and then you should just go ahead and replace your pistons and rings and have it bored accordingly ($500-$1000 more).
This is what we here on r3v call a case of the "while you're in there"s.
Then there's always "If it ain't broke, don't fix it." Which I'm a fan of.
Good luck bro.Originally posted by Andy.BComment
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Don't forget to change the rod bolts, too...
tnow, sometimes I just mess with people. It's more entertaining that way. george gravesComment
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And head bolts ^ or buy head studs. IE has em for like $200 or soOriginally posted by flyboyxOriginally posted by Northern
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