My m10b engine thread

[Intro]

Did you decide which crank to go with.
If you are still deciding i would go with the 2002 crank because of the stroke, and because it is forged.
The extra stroke on the 2002 crank will give you the more "boom for the pop" at lower rpms because of the increased piston velocity at lower speeds+ gives you more displacement.
The reason alot of people want the smaller crank for high reving, is due to the physics of a working engine and the velocity/force that is applied and the limit of said metal when balancing, friction, and such is taken into consideration. Smaller stroke = less force acting on parts= possibility of higher rpms, though in this thread i thought i read you were going to keep your stock rocker arms and springs which might be a problem for high rpm usage.

But because the 2002 is forged and the 1.8l is cast the difference will be made up by the process.
Hope this helps.

[Jean]

Small update, few needed pieces for the head to be complete.

Coolant hose connector piece and o-ring, mine was corroded...





The oil sprayer tube and it's parts



Fuel injector o-rings and clamps






The fuel vibration dampler items are now these , instead of the metal ones



I got the leak down test / compression test done on the engine in the car and it's not great, so I am not sure right now if i am going to bother putting a new head on it or end up building a new bottom end also...

[Jean]

I don't think so, just a standard head rebuild with a 3 angle job. 10% at low valve lift on a 100hp engine AT low rpms is probably not even noticable lol

[ptownTSI]

did you back cut the valves per the discussion last week? easy 10-15% flow improvements at low valve lift.

[Jean]

We'll see. I am pricing everything I need out now, damn it adds up quick even for a small 4 cyl rebuild... gaskets, bolts, oil pump, chains, tensioner kit, etc etc etc... Maybe some 2002 soul will buy it in the end for 1/2 the price lol

[vivalegreg]

it certainly will be a good experience. its worth it. good luck with it!

[Jean]

Doh. It's alright, I paid $200 for the whole engine, spend $300 on the head rebuild and looking at another $350 for the bottom end rebuild , plus 300-400 on new pistons/ring set and maybe 200-300 for bearings, gaskets, bolts, nuts. So about 1500 or so in the end, no sense to start all over, will do better with next build.

[iNetMANN]

Shoulda just gone to recetep.com and ordered a short or long block kit...


4 cylinder M10 SHORT BLOCK Performance Engine Rebuild kit: (2002,320i, 318i)
JE Forged pistons (Any bore size or compression ratio)with Total-Seals
German Rod and Main bearings (std, 10, 20)
Full engine gasket set
Timing chain, tensioner and guide rails
Oil pump with chain, gear, nut, and washer
$995.00 Order Now

4 cylinder M10 LONG BLOCK Performance Engine Rebuild kit: (2002,320i, 318i)

Performance Re-Ground camshaft (288, 294, or 302) exchange.
Performance Dual Valve Spring set
New Rocker arms and Rocker Shafts

New Intake and exhaust manifold Studs and Nuts
New Heavy Duty Cylinder Head bolts
JE Forged pistons (Any bore size or compression ratio)with Total-Seals
German Rod and Main bearings (std, 10, 20)
Full engine gasket set
Timing chain, tensioner and guide rails
Oil pump with chain, gear, nut, and washer
$1350.00 Order Now



RODD

[Jean]

Alright, so crank is good, block is ok other than 2 cylinder having a little bit of rust inside the cylinder wall. I asked if they can just rehone it, and he said it won't be 100%. Machine shop recommended that I get new pistons, and they bore the block over 20 over, it will only be $50 more in labor. So it's a no brainer in terms of labor to do it right.

So, now I am looking into what options I have in terms of pistons, do MaxSils come in different sizes ? If I just order a set of MaxSils for 84 m10b18 they won't be the right size right ? Shop would prefer to have pistons on hand to make sure everything fits correctly...I wish I could just tell them what size to go with and then I order pistons to match w/o having to order a CUSTOM set of pistons. I want something off the sheft.

[Jean]

Well, dropped it off today, should find out in a few days if the block/rods/pistons/crank is good or not. Should come out clean, then I'll order new bearings/gaskets and try to put together my first rebuild hehe.

[Jean]

Chains FTW lol..

I really need to find a good book on this, I don't know what the right procedure is for a good rebuild , specifically on piston rings and bearings / measurements... ugh.

[Hick]

318is = M42 = chains also [going off your sig kiddo]

[2002maniac]

is that an early model m10(noob question) i thought they had a timing belt?

all m10's have chains

[buhnah7]

is that an early model m10(noob question) i thought they had a timing belt?

[Jean]

Bottom end, crank and rods are going to the machine shop tomorrow for inspection and cleaning. I notice very little wear on the crank, and cylinder walls still have cross hatching.