Buying a Boxster that jumped timing

[WhiteSmokeLS1]

Anyone have an estimate on rebuilding one of these engines? If metal fragments went into the engine, I would assume the real expense is if you needed to bore it and replace the pistons... other than that, main and rod bearings, machine crank (maybe), rings, hone cylinders, and a gasket set doesn't seem terribly expensive. and depending on damage to the intermediate shaft... anything I'm missing?

Of course this is all assuming a worst case scenario.

[JFP in PA]

Originally Posted by WhiteSmokeLS1

Anyone have an estimate on rebuilding one of these engines? If metal fragments went into the engine, I would assume the real expense is if you needed to bore it and replace the pistons... other than that, main and rod bearings, machine crank (maybe), rings, hone cylinders, and a gasket set doesn't seem terribly expensive. and depending on damage to the intermediate shaft... anything I'm missing?

Of course this is all assuming a worst case scenario.

There are no oversized bearings for these engines; damage the crank, throw it away. The 2.5L engine is well known for having cylinder wall issues, thinning out the walls by over boring it will not help this problem. Many rebuilders replace the OEM cylinders with CNC machined billet replacements called "nickies", which while excellent replacements, are not cheap.

Because of the way the M96 is assembled, you have two cases that split to reveal the alloy crank carrier assembly that holds the crank and rods. Because of how this goes back together, several special tools are required as just putting the retainer clips back that hold the wrist pins in place is done through a small hole, much like building a ship in a bottle.

Add in the fact that when an M96 "jumps time", a lot of really bad things can happen very quickly:



I think you need to look into what is involved a bit further...............

[Topless]

Originally Posted by WhiteSmokeLS1

Anyone have an estimate on rebuilding one of these engines? If metal fragments went into the engine, I would assume the real expense is if you needed to bore it and replace the pistons... other than that, main and rod bearings, machine crank (maybe), rings, hone cylinders, and a gasket set doesn't seem terribly expensive. and depending on damage to the intermediate shaft... anything I'm missing?

Of course this is all assuming a worst case scenario.

It's a breeze really. Just machine all your internals from billet stock and you are good to go.

I don't know JFP, I think we can still work with those heads.

[JFP in PA]

Originally Posted by Topless

I don't know JFP, I think we can still work with those heads.

A little dab of welding here than there, and pretty soon you'll have a real nice boat anchor.............

[jsceash]

Originally Posted by WhiteSmokeLS1

Anyone have an estimate on rebuilding one of these engines? If metal fragments went into the engine, I would assume the real expense is if you needed to bore it and replace the pistons... other than that, main and rod bearings, machine crank (maybe), rings, hone cylinders, and a gasket set doesn't seem terribly expensive. and depending on damage to the intermediate shaft... anything I'm missing?

Of course this is all assuming a worst case scenario.

Not quite the same motor. I'm rebuilding a some what good 3.2L motor. 3 cylinders had low compression no real damage on heads valves or bottom end. My end cost is looking to be right around $8500. I am doing all the assembly work. I had to buy about $700 in tools to assemble the motor so My end cost is going to be $9200. LN sleeve, JE pistons, pins, rings, rods, and bolts $6100. New stock valves, springs, stem seals, retainers, spring caps, all seals, gaskets, water pump, 170 deg. thermostat, ARP Assembly bolts The end result is a better balanced motor that is 3.6 L.