Forget 24v, m20 powahhhhh is where its at!!!!!

[maggspower]

="motormanmick"]I am confident the busted ring was a fault within it by the way. My story and I'm sticking to it

100% agree, faulty materials, happens to me all the time.

great idea about the bench grinder for filing the rings.

I hardly put any pressure on it!!!!

The grinder is for valves, it'll feature later on no doubt. But the stone is super fine, for creating the seal between the seat and the valve, seems to do the job really well.

[jimbom30cab]

Love it !!!

[maggspower]

So with parts of the build on hold, we decided to carry on with a few other bits.



Some bits got painted.



Others got cleaned and soda blasted.



The shell had sat a few weeks to allow the paint to fully harden, and then with the suspension back on it was readied for the engine bay to be built back up.

[maggspower]

So as always seems to be the case, we were short of time, and had a lot to do........ Enter our secret "weapons" Kevin & Perry



And after some initial power staring, work actually got under way.





The aim was to get the engine bay as ready as possible to accept the motor. "Perry" got on with tidying up the loom, whilst "Kevin" sorted out the front end, and steering rack. This was changed for a faster/less turns rack, to help give the car a more modern feel.





It actually began to look like a car again. Just waiting for some brand new sound deadening, and heat shields for the bulkhead from BMW.

[_Dan_]

Lmao best post ever , well done Kev.

[Daveaholliday]

Nice job Kev!

[HartgeH27]

I have been staying off the thread but that last post was quality ! Maybe a movie career for the Tractor Driver ?

[_Dan_]

I have been staying off the thread but that last post was quality ! Maybe a movie career for the Tractor Driver ?

Same !

[maggspower]

I had noticed someone had been messing with my status

[bmw9818]

niceee thread! been in two minds on keeping the m20 or v8 ing, still aint decided but seeing this is making me side with the m20!

[maggspower]

I have been staying off the thread but that last post was quality ! Maybe a movie career for the Tractor Driver ?

Just wait until Chuck Norris shows up to do the wiring loom! Not a joke

Lmao best post ever , well done Kev.

Cheers Perry

Nice job Kev!

[Rodderz]

Is this the origeinal Hartge engine, or have you building it out of a standard one?

[maggspower]

Is this the origeinal Hartge engine, or have you building it out of a standard one?

The donor is a standard m20b25, but it now goes far beyond the spec of a Hartge h27. Every part has been altered, made better, lighter or stronger in some way or another.

[bab-91]

Is this the origeinal Hartge engine, or have you building it out of a standard one?

The donor is a standard m20b25, but it now goes far beyond the spec of a Hartge h27. Every part has been altered, made better, lighter or stronger in some way or another.

I have a Welsh friend, I expect discount, on top of the premium you charge for English customers...

[Rav335uk]

Is this the origeinal Hartge engine, or have you building it out of a standard one?

The donor is a standard m20b25, but it now goes far beyond the spec of a Hartge h27. Every part has been altered, made better, lighter or stronger in some way or another.

I have a Welsh friend, I expect discount, on top of the premium you charge for English customers...

Gerty isn't Welsh Babs

[Rav335uk]

This is an Epic pic....LOL....

[maggspower]

I have a Welsh friend, I expect discount, on top of the premium you charge for English customers...

Evans or Jones, is it? We all know each other here

Discount only applies if you can sing the national anthem or can act out a scene from the film Twin Town

[HairyScreech]

I have a Welsh friend, I expect discount, on top of the premium you charge for English customers...

Evans or Jones, is it? We all know each other here

Discount only applies if you can sing the national anthem or can act out a scene from the film Twin Town

I used to live on the street that the filmed the infamous car jump on.

[maggspower]

So with Kevin and Perry packed back off to Ibiza, it left us to get on with some real work. Some engine work

Got the crankshaft and rotating assembly back......

[youtube][/youtube]

Some detail of the areas where material has been removed.





And a load off the flywheel, This would have certainly thrown it out at mid to high revs.



Time for another dummy build. First of all to check some piston clearance. The eagle eyed will notice the piston swap, the pic is for illustration only, image quality fail also

The old plasticine trick. Its the only way, a bit of WD40 on the valves makes it stick to the piston.







The actual pistons used in this build have massive cutouts so even with considerable cam timing change there is no danger of any coming together.

Next the crank was checked again, both for scratches and deformity, it was checked before balancing, but its good practice to do it again.

All good on the mains and big ends so off for a polish.





There are 13 journals on the crank, these were all checked using plastigauge, some say that this is not as accurate as measuring with bore gauges and micrometers, I agree, but it is accurate enough for our purposes here. This measures the gap between the journal and the bearing, the oil clearance. Getting this right is critical to power and longevity. With the crank polished it was perfect.

[maggspower]

With that lot all checked out it was stripped and cleaned again, ready for assembly.

The new core plugs were hammered in.



And the crank was set in its permanent position.



However, once again plain sailing was not the order of the day

If you look just to the left of the oil hole, you can see a tiny inclusion in the surface of the bearing. You could catch your nail on this and had gone in there during the making process, if you look you can see a rotational "shadow" originating from this foreign body. Although they had been in the engine for measuring the clearance, the crank had not turned on them.

The scratches are where my supplier was picking at it with his fingers, he then saw my face, and set about changing the offending item.

Always check your parts, don't assume that if they are new they are fine. These are high quality OEM bearings. I only found this at the second time of looking.



Luckily this was got from a local supplier, next working day, sadly that was a Monday so no progress for a few days.

With the piston ring finally in stock.........



I could get on with mounting the rings on the pistons.



All the pistons and rods were paired together, to get an exact match in weight.



These could then go into the block.



And the whole of the bottom end stuff torque and angle tightened to spec.

[JungleGus]

Where's the queue for M52 > M20 conversions??

LOVE this - thanks for sharing!

[JoshH]

Good work Byron enjoyable read!

[maggspower]

Gus, that is an interesting concept. I wonder if there's enough m20s to go round?

Thanks Josh.

[bab-91]

I have a Welsh friend, I expect discount, on top of the premium you charge for English customers...

Evans or Jones, is it? We all know each other here

Discount only applies if you can sing the national anthem or can act out a scene from the film Twin Town

Her name is Natasha Jones


She speaks fluent Welsh, does that count? Gimme discount!

[maggspower]

Let's talk more about Natasha

[Simon13]

Well i've just seen read this. As others have said, a great informative read. I've heard its a great engine through the grape vine

My m20 is ready to go back in my E30!

[mr2peak]

So wait, what happened here? It's all together?

[maggspower]

Just seen this thread the home page I forgot about it a bit.

A few things have got in the way, including moving to a new, but smaller shop. Its been like trying to fit a quart into a pint pot

Anyway, give me a little time I'll sort it out, get the thread finished.

[Bonymaenjack]

I have only total admiration, engineering at it's finest .

[TPS]

Well i've just seen read this. As others have said, a great informative read. I've heard its a great engine through the grape vine

My m20 is ready to go back in my E30!

It is a Great Engine

[reggid]

the m20 is making a comeback these days, it is great to see.

[HartgeH27]

Byron M20 Technology coupled with Dan, a winning formula.

[jmc330i]

I certainly won't be selling the original M20 from my Sport, I'm slowly gathering all the bits for a full refresh and 2.8 build.

[Chris]

God damn you Photobucket

[Chris]

Yay, the pictures are back.

Great work there!!!