"Here we go" more m42 info needed

Sun Dec 28, 2008 6:26 pm

I am about to get my final bits off magpie for my conversion. Now I just gotta find somewhere in which to do it and an engine crane!

Sun Dec 28, 2008 6:33 pm

robbo86 wrote:I am about to get my final bits off magpie for my conversion. Now I just gotta find somewhere in which to do it and an engine crane!

what are you doing, a m42 conversion ??

Sun Dec 28, 2008 6:36 pm

robbo86 wrote:I am about to get my final bits off magpie for my conversion. Now I just gotta find somewhere in which to do it and an engine crane!

Buy one second hand, then sell it for the same price after you're done

Sun Dec 28, 2008 6:42 pm

cranes are cheap buy one and then sell it on, or why dont we all but some money in a pot and buy one and who ever needs it next pay for postage to them, we could just have it for the zone.

Sun Dec 28, 2008 7:39 pm

Baz666 wrote:
robbo86 wrote:I am about to get my final bits off magpie for my conversion. Now I just gotta find somewhere in which to do it and an engine crane!

what are you doing, a m42 conversion ??

No an S52 conversion. Just tought I would post it up in the m42 section for the hell of it

Only playing, yeah my m42 has been sat in my mates garage for a while. I cant use his garage as he can only just get his 106 in there so no chance of my e30!

Mon Dec 29, 2008 1:48 pm

tommy22 wrote:alright barry you got the car then how much did you give the muppet in the end

nice

fellow owner wants his best price, and that makes him a muppet.

Mon Dec 29, 2008 7:34 pm

Baz666 wrote:
raydon boy`s how is yours coming on i here your almost there, engine in and sprayed isnt it.

Its 99% done just need ross to order some more paint so he can paint the roof and the boot lid. Took it for a drive yesterday and again today love it cant wait till its mot'd!

Tue Jan 06, 2009 12:49 pm

if you dont already know its in and running good.

all i need to do now is clean it service it and then change over the rocker cover and the inlet
to my nice new blacks

yeah also need a exhaust ? if anyone knows of one. from the manifold or just the back box a nice chrome
one will do.

Sun Feb 15, 2009 7:51 pm

Ok stupid question here..... I am full of them. If I have the gearbox I assume the clutch is part of thatg assembly

Sun Feb 15, 2009 9:28 pm

Clutch is bolted to the fly wheel on the engine if thats what you're asking

Sun Feb 15, 2009 11:29 pm

I have the engine bolted to the gearbox so would assume the clutch deeley is there. I know engines and more or less how they work but my knowledge of a clutch extends to how to use it.

Mon Feb 16, 2009 11:00 am

If you bought it as a complete unit I would be suprised if some one bothere to take the clutch out.

The fly wheel is bolted to the crank, there is a pressure plate which bolts to that and a drive plate inbetween the two. When your foot is down on the peddle it pushes on the middle of the pressure plate and realises the drive plate (allowing you to change gear), when you take your foot off, it takes the pressure off of the middle of the pressure plate which then clamps its self back firmly onto the drive plate allowing power transfer.......and shit

If that makes sense sure there's a better way of putting it

Mon Feb 16, 2009 12:30 pm

No worries, I figured it would probably be there, but I wanted to make sure is all. I must sound like a right muppet.

Wed Feb 18, 2009 12:13 pm

hello,

I'm attempting this later this week / next week and am a bit concerned about the 1.8 box not fitting the m42 due to shaft sizes. I am hoping this was due to the spigot bearing wearing around the 1.8is box and so that is what it was used to, and a new spigot bearing would mean the 1.8 box would fit.

Also if the 1.8 box fits what's to stop me from using the propshaft? as I assumed the m42 block mounts the same as the m40 as its effectively the same block. I do have a 318is prop but it has a worn centre bearing and don't want to have to swap the bearings as they sound hard work to setup properly.

Wed Feb 18, 2009 12:22 pm

mt1104 wrote:hello,

I'm attempting this later this week / next week and am a bit concerned about the 1.8 box not fitting the m42 due to shaft sizes. I am hoping this was due to the spigot bearing wearing around the 1.8is box and so that is what it was used to, and a new spigot bearing would mean the 1.8 box would fit.

Also if the 1.8 box fits what's to stop me from using the propshaft? as I assumed the m42 block mounts the same as the m40 as its effectively the same block. I do have a 318is prop but it has a worn centre bearing and don't want to have to swap the bearings as they sound hard work to setup properly.

Gearbox, prop and diff (unless LSD) are the same on 318is as for 316i or 318i.

I swapped my M42 in with the box, prop and diff that were still in the car from 316i m40.

BMW list the same part no for gearbox for m40s and m42s, and the prop is the same length so all will work fine.

Wed Feb 18, 2009 1:43 pm

mr_dink wrote: Gearbox, prop and diff (unless LSD) are the same on 318is as for 316i or 318i.

Really? I thought the IS has a different box (Getrag 260?), which is longer requiring a shorter prop? I assumed that the mounts would be in the same place(same block, same style of arm etc.) and the bolt pattern is the same so you can bolt either gearbox to it but you'd need the relevant prop. As far as the gearbox input shaft is concerned, since people put m40 clutches on m42s successfully, I figured the splines must be the same. A quick check of realoem seemed to suggest that the spigot bearing inside diameter increased after 09/1990 so that was the only thing I thought I'd have to check.

I am doing this swap as well, well I would be if I could actually get to the car.

I plan to use the m40's getrag 240 box with its original prop, the single mass flywheel and clutch that's already on my m42 a 12x32x10 spigot bearing as fitted the m40 engine originally and with luck everything should fit. I'm also using e34 m50 engine mounts, I've been told these are appropriate but I don't know myself yet. I've got a rad from an e36 320i that I plan to use but I can't imagine the fan cowling will be right (ah, I just recall I destroyed the cowling on an autotest anyway). Not sure about exhaust yet, someone promised to sell me an m42 one but I can't get through to him, I've also thought about adapting the m40 one but I'm less keen on that.

I have some m50 coil packs so I'm tempted to do the COP conversion, I have access to CNC machining so I'll get a plate made up easily.

Wed Feb 18, 2009 5:10 pm

mr_dink wrote:Gearbox, prop and diff (unless LSD) are the same on 318is as for 316i or 318i.

I swapped my M42 in with the box, prop and diff that were still in the car from 316i m40.

BMW list the same part no for gearbox for m40s and m42s, and the prop is the same length so all will work fine.

It's not true, I was under the impression I could have run the M40 prop with the M42 gearbox.

7pm on the last day of my swap, all I had to do was fit the prop and connect the battery, only to find out the M40 prop was too long. I then had to go about swapping the centre bearings over because the one on the M42 prop was shagged.

Due to inexperience and lack of a proper sized bearing puller, I wasted a lot more time than I should have buggering about.