DIY: M3/S50 Cams into M50

This section holds all DIY's directly related to the e36 chassis. Everything from changing the oil on the m3 to swapping an s54 into your 325i.

DIY: M3/S50 Cams into M50

Postby niks325i » Tue Jun 09, 2009 8:51 am

Jer showed this morning and we started to take things apart to do the cam swap. Going to use the M3 cams.

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This is what your engine looks like inside when you run good oil. This oil has been in the engine for one full year. That includes one very full autox season and a winter of driving. Amsoil Series 2000 0w30.

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Pulling the vanos system off the front was the first task at hand. Turned the engine so that all the lobes were on the intake cam were not pushing on the valves except for on piston one. Then pulled off the timing cover and vanos.

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Last edited by niks325i on Tue Jun 09, 2009 6:02 pm, edited 1 time in total.
1993 325i, laguna grun, M3 ZF tranny swap, Clutchnet 6 puck clutch, Holset HX35 turbo, TRM tune, 3" stainless exhaust w/ Magnaflow, Ground Control coilvers, swapped M3 strut hats, H&R 28 mm front sway, M3 rear, 3.91 LSD, 17x8 BBS RK, grill .
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Re: DIY: M3 Cams into M50

Postby niks325i » Tue Jun 09, 2009 8:52 am

Next is to take of the sprockets and the chain that link the two cams together. To do this you need to push down on the tensioner and then slide in two small nails to hold the tensioner down.

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We decided to use zip ties to make sure that the chain stayed on the same teeth after we removed the sprockets.

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Cams without the sprockets and linking chain.

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We did the intake cam first. In order to get the cams out without breaking them, we needed to turn them so that the lobes were not acting on any of the lifters but the front two. After that, we start loosening of the bearing caps working from the back of the engine forward. If there is no tension on the valve springs on those lobes, the bearing cap nuts should crack loose and spin of easy. It worked out well. Last was to undo the front bearing cap slowly a quarter turn at a time, and then pull out the cam.
1993 325i, laguna grun, M3 ZF tranny swap, Clutchnet 6 puck clutch, Holset HX35 turbo, TRM tune, 3" stainless exhaust w/ Magnaflow, Ground Control coilvers, swapped M3 strut hats, H&R 28 mm front sway, M3 rear, 3.91 LSD, 17x8 BBS RK, grill .
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Re: DIY: M3 Cams into M50

Postby niks325i » Tue Jun 09, 2009 8:52 am

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As Haynes always says, install is reverse of removal. :) Pic of M3 intake cam installed.

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Me pulling out the exhaust side.

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Once the cams are back in, you need make sure the engine is at top dead center. There's a little rod that you are supposed to push through a hole in the block and if the engine is at TDC, the rod slides into a hole in the flywheel. Well, the rod we had sure wasn't going to fit through the hole in our block, so we just made sure the engine was at TDC by aligning the marks at the front of the engine near the crank position sensor.
1993 325i, laguna grun, M3 ZF tranny swap, Clutchnet 6 puck clutch, Holset HX35 turbo, TRM tune, 3" stainless exhaust w/ Magnaflow, Ground Control coilvers, swapped M3 strut hats, H&R 28 mm front sway, M3 rear, 3.91 LSD, 17x8 BBS RK, grill .
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Re: DIY: M3 Cams into M50

Postby niks325i » Tue Jun 09, 2009 8:53 am

After that, you make sure your cams are positioned correctly and lock them with the cam locking tools below.

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Time to reassemble the vanos and position the cam sprockets etc. I skipped a few details in the right up here including the use of the chain tensioner tool that is outlined in the Bentley manual.

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ONce everything is all lined up. Remove the cam locking tool and tensioner tool. Replace tensioner tool with the actual tensioner.

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Put everything back together. I got the cams with the Turner chip so I installed that for now too.

Back together.

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Runs good. The cams are a little noisier than the stock M50's. They were a little noisey when the were in the autocross car too. Took it for a drive. Runs good and pulls a bit harder, so I think all is well. Tranny held up so far with the added power. :wink:
1993 325i, laguna grun, M3 ZF tranny swap, Clutchnet 6 puck clutch, Holset HX35 turbo, TRM tune, 3" stainless exhaust w/ Magnaflow, Ground Control coilvers, swapped M3 strut hats, H&R 28 mm front sway, M3 rear, 3.91 LSD, 17x8 BBS RK, grill .
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Re: DIY: M3 Cams into M50

Postby niks325i » Tue Jun 09, 2009 8:55 am

Since I did this I have gone to forced induction and have the Turner chip available for sale if anyone is thinking of putting S50 cams in their own M50. PM me if interested.

Nik
1993 325i, laguna grun, M3 ZF tranny swap, Clutchnet 6 puck clutch, Holset HX35 turbo, TRM tune, 3" stainless exhaust w/ Magnaflow, Ground Control coilvers, swapped M3 strut hats, H&R 28 mm front sway, M3 rear, 3.91 LSD, 17x8 BBS RK, grill .
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Re: DIY: M3 Cams into M50

Postby DEFKON99 » Tue Jun 09, 2009 11:02 am

Woah Cool Thanks for the DIY!!
Edge one looks like that stupid cube you buy to reset the brake pistons on doo doo cars -Proctor750

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Re: DIY: M3 Cams into M50

Postby niks325i » Tue Jun 09, 2009 11:39 am

DEFKON99 wrote:Woah Cool Thanks for the DIY!!


No prob. I will be using your DIY Tranny Swap article this weekend to help me with my swap.

Nik
1993 325i, laguna grun, M3 ZF tranny swap, Clutchnet 6 puck clutch, Holset HX35 turbo, TRM tune, 3" stainless exhaust w/ Magnaflow, Ground Control coilvers, swapped M3 strut hats, H&R 28 mm front sway, M3 rear, 3.91 LSD, 17x8 BBS RK, grill .
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Re: DIY: M3 Cams into M50

Postby DEFKON99 » Tue Jun 09, 2009 2:00 pm

cool Feel free to Pm Me if you have any questions im on here frequently since well my job requires that i have full access to internets. ;)
Edge one looks like that stupid cube you buy to reset the brake pistons on doo doo cars -Proctor750

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Re: DIY: M3 / S50 Cams into M50

Postby ali » Wed Jun 10, 2009 10:11 am

people helping people...it's a beautiful thing.

awesome DIY man. Cams installs scare me. I'll be doing my first one in a couple of weeks on my m30 swap in my e30.

-Ali
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Re: DIY: M3/S50 Cams into M50

Postby loonibab///m3 » Thu Jul 16, 2009 3:02 pm

nice writeup!
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sirius680 (Caligula): ok, how the hell do i bump a e36tech thread with a e36tech logo in my sig WITHOUT looking suspicious
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Re: DIY: M3/S50 Cams into M50

Postby Volfinator » Fri Jul 17, 2009 4:51 pm

Cool. Nice job
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Re: DIY: M3/S50 Cams into M50

Postby blacklove7777 » Tue Aug 04, 2009 2:01 pm

good job without cam removal tool
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Re: DIY: M3/S50 Cams into M50

Postby Caligula » Wed Aug 05, 2009 1:29 am

They didnt add that when removing and installing those bearing caps, you need to turn the nuts only a 1/4 turn at a time, going from one side to the other, until you reach the torque spec. That the only safe way to do that without the cam arm.
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Re: DIY: M3/S50 Cams into M50

Postby BMWMPower » Tue Aug 18, 2009 4:06 pm

what position does the crank have to be in, to avoid impacting the pistons with the valves? TDC? thanks
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Re: DIY: M3/S50 Cams into M50

Postby Caligula » Tue Aug 18, 2009 4:29 pm

Yes. Crank at TDC, and Cams should be at TDC with the cam blocks and flywheel pin in place.
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