FS: Euro m20b25, worked head, custom pistons, +MORE

[ColdAccord]

Complete Euro m20b25

From my touring. 99k on it. EURO m20b25. just like the U.S. version, just different pistons so a tiny bit higher compression ratio (little more power). Bolts right into a 325i/is no problem. or a 325e with the necessary changes. no leaks, doesn’t burn any oil, no issues whatsoever. With clutch, flywheel, and Getrag 260 5 speed transmission, no grinds, no issues. Have pics (they’re just on my external hard drive which is at my parents house). Comes with alternator, p/s pump, starter, etc etc. everything it would normally come with (but no a/c compressor, my touring doesn’t have a/c)

$1300 w/tranny & everything








Mahle 10.2:1 pistons. Brand new, in box. Come with all rings. Designed to use “I” rods (I have a set w/60k on them in the “Used m20 parts” section below)
$535






Performance valve springs: full set
“the increased duration of a performance cam with an aggressive grind forces the valve to open and close at a much faster rate. This rapid opening and closing at high RPM can cause "valve float". Valve float is the inability for a valve spring to close the valve fast enough to avoid piston contact.”
$245


New in box e30 rocker arm shafts (includes 2).
$70


o2 sensor, m20b25, $40




m20b25 rods 60k on them $50


m20b25 idle control valve. $35.





4.10 open differential. probably leaks. $40






351 DME. ~65k on it. $50




Early model (84-87) passenger side taillight. Great shape (bought from Jordan).
$35






overhead panel, for sunroof cars. Had a bit of discoloration in the center where the rearview mirror goes, I sharpied it. Can’t even see it when installed
$20





late model 3rd brakelight
$10




All these parts are brand new in box replacement parts
head bolt set pn 11-12-1-726-478 $15
clutch master cylinder 21-52-1-156-000 $55
clutch slave cylinder 21-52-1-116-300 $30
rear shock mount set 33-52-1-092-362 $25
transmission tail mount 22-31-1-094-916 (2) $10
guide bushing for driveshaft 26-11-1-207-096 $7
a/c compressor belt 64-52-1-466-043 $4
engine mounts (2) 11-81-1-132-323 $25 for both
Bosch Super spark plugs (set) 12-12-9-061-869 $25

[ColdAccord]

still have everything listed in this thread

[cerdman]

You have PayPal for the head gasket set

[MIKe30]

how much just for engine, no tranny? may or may not be interested depending on what i get myself into within the next week or so

[ColdAccord]

sold the cylinder head, harness, intake manifold, fuel rail, lines, the good tb (theres another one up with a broken spring), valve cover, and oil cooler yesterday

thread updated, everything is current

[ColdAccord]

ttt the first post is what i currently have

[B-e30_e46]

I would like the iX dip stick

[318iEnthusiast]

is the engine price negotiable? i have a 88 325 that neeeds a swap... lmk thanks

[Ruffian]

I'm just curious why you think it's the higher compression engine.

[ColdAccord]

euro motors had slightly higher compression.

i know its a euro motor because its out of my touring

[ColdAccord]

just updated the original thread. everything listed is what I have for sale

[netcsk]

How much shipped for the sunroof trim piece to TN 37347?
Thanks

[SchnellerVert]

I'm just curious why you think it's the higher compression engine.

Not that it matters but...

The E30 320i/6 and 323i had a redesign for their cylinder heads. Again the 320i/6 and the 323i used the same head casting (1264731) with exactly the same combustion chamber shape but this time the inlet ports were enlargened to a 36.5 mm diameter. The compression ratios on both models was now 9.8:1. I have reason to believe that the cam timing duration was lowered but figures I do have conflict (I intend to get hold of a cam and measure it myself soon). I know the relatively large 110 deg Lobe Centerline Angle was retained. None of the above BMWs were officially sold in the USA. However the small six based 'Eta' engined was. This (as fitted to the 325e plus 528e-US and 525e-Europe) used the earler small port head casting (1264200) and a compression ratio of 8.0:1 in the USA (due to their lower octane fuels) and 11:1 in the UK. Three of the cam bearings were made redundant to reduce friction. The cams Lobe Centerline Angle was reduced to just 102deg with around a 236degree duration (don't quote me on that!) and low overlap. The inlet tracts of this motor are of considerable length-553mm.

However the milestone of the small- six engines was yet to come: the 325i unit (325is in the states). This head (casting number 1705885) has large U-shaped ports (about 37mm by 37mm) and a slightly larger combustion chamber volume of 40cc but follows a new combustion chamber philosophy. Several studies have shown that an open chamber design (basically spherical in shape) has a faster burn rate (desirable in terms of avoiding detonation and good for efficiency) than either a classical hemi chamber (such as that used on tha Alfa V-6) or a Heron chamber(bowl in piston such as that used in VW Golfs/Rabbits). On the 1705885 head there is a dish in the piston within a dome! This is hard to explain unless it has been seen. Basically BMW engineers probably reasoned out that it would not be possible to move the spark plugs to a more central position (desirable in terms on thermodynamic efficiency) and keep the cylinder configuration the same so they moved the bulk of the chamber volume around the spark plug (which consisted of the offset dish in the piston and the hemi in the head) all the rest became squish zones. This is an outstandingly efficient package. The stroke was made shorter than the old 323i while the con rods were lengthened to increase rod to stroke ratio to reduce friction/increase top end poke. The compression ratio was 9.7:1 and 8.8:1 for the US market/later European spec. The lobe centerline angle of the camshaft was reduced again to 108 degrees but so was the duration. The late Eta used the large port "885 head (often called the 'supereta'). I have no knowledge on what kind of piston or cam timing that has been used.

[Ruffian]

Not that it matters but...

Yes. "most" of that i knew schneller, but what I was looking for from him is the E or K code on the block that designates what the difference is. He didn't include a date on the engine that I saw, and as you can see from your quote, the later euro engines were identical to the later u.s. spec. I wasn't aware that there were early tourings, so that's what makes me wonder why he is thinking it's the higher compression m20b25.

All in all though, we're only talking about 2 horsepower difference between the two. The higher E code eta block, the 11:1 referred to, now that was a big difference.

[SchnellerVert]

The hp level is squat, it's the cam that makes a differance we got a crappy cam for driveabilty and smoothness. Early cars also had no cats and were the most aggressive. 86/87 325i cars.

88 was the build date on his car, if we had a VIN you could get what engine it would have.