HG change and other stuff.. [Archive] - Bimmerforums

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GT110

09-04-2010, 11:49 AM

I have been dealing with pressure in the coolant for a while now. I have tried various things, new water pump, thermostat, fan clutch, fluids to name a fiew. In the end I added a VDO pressure guage on the coolant to monitor when the pressure would start to build. The car was ok untill 30minutes into driving when the pressure started to build up. Also I could see that the pressure would build faster if I drove in boost. It wasnt obvious that the HG was gone, but it was obvious that something was wrong :D
I started to worry about a cracked head and all kinds of stuff, so in the end.. with no mechanical skills or experience.. I drove the car into my garage and pulled the head off.
Then I notided that the MLS HG was blown between cyl 1-2 and 2-3 (burned) The pistons seemd ok, also the block but I was not sure about the head.
http://myndasafn.bmwkraftur.is/d/87966-2/rebuild215.jpg
http://myndasafn.bmwkraftur.is/d/87969-2/rebuild205.jpg
Possible reasons..
1. Detonation / too agressive ignition
2. The 440cc injectors at 4 bar were not enough
3. Various other reasons
The car is originally tuned for 12psi by a very skilled tuner. Since then... I have added a boost controler (play‘d around with boost and GAIN) The airbox blew so I modified the Original BMW, I added a Variable FPR, changed the intake for the turbos and other stuff like the 2.65 diff and Piggyback. I don‘t think the piggyback killed the engine because I had the pressure issues before that. The injectors I am using are only 440cc Siemens DEKA and I noticed that at 1 bar they were ate 95-100% duty cycle, which is not good, so you can only imagine how it was at 20psi L even though the AFR‘s were ok (and EGT)
So.. in the end.. .my fault that the gasket blew.. live and learn :D
I took the head to the machine shop.. no cracks, pressure tested, resurfaced and valve seats cleaned. I cleanded the pistons and block and got ready for install.
I also had the back exhaust manifold resurfaced since I had a minor leak on cyl 5 since the begining.
Even if I have no experience or qualifications I decided to continue the work.. so I proceded with the valve adjustments which is not easy when you dont have the special tool.
As I said before I was using the MLS 0.070 gasket, but I am going with the OEM BMW this time around.
I had a spare AJUSA HG and compared to the OEM, but in the end I whent with the OEM.

http://myndasafn.bmwkraftur.is/d/87987-2/prebuild004.jpg
BMW / Elring HG
http://myndasafn.bmwkraftur.is/d/87990-2/prebuild005.jpg
AJUSA HG
http://myndasafn.bmwkraftur.is/d/87978-2/prebuild001.jpg
Im also upgrading from regular ARP‘s to ARP2000 8)
http://myndasafn.bmwkraftur.is/d/87892-2/rebuild011.jpg
http://myndasafn.bmwkraftur.is/d/87895-2/rebuild012.jpg

There will be other modifications this time around. I have put some heat deflectors and heat wraps on the downpipes.
I will also be installing brand new and flow matched RC 750cc´s along with a standalone knock detector/warning
http://myndasafn.bmwkraftur.is/d/87931-2/rebuild009.jpg
http://myndasafn.bmwkraftur.is/d/87948-2/rebuild2005.jpg
http://myndasafn.bmwkraftur.is/d/87922-2/rebuild006.jpg
http://myndasafn.bmwkraftur.is/d/87916-2/rebuild004.jpg
I have no idea if the heat shields on the airbox and wraps on downpipes yield any results.

Preparing for install
http://myndasafn.bmwkraftur.is/d/87993-2/krani001.jpg
In the end I had to remove the front manifold, it would not fit, and install after the head was on.
http://myndasafn.bmwkraftur.is/d/87907-2/rebuild001.jpg
Engine block ready with shiny pistons.
http://myndasafn.bmwkraftur.is/d/87888-2/rebuild010.jpg
Hedd on.. doing it myself with no help.
http://myndasafn.bmwkraftur.is/d/87898-2/rebuild013.jpg
Happy camper!!!!!!!
ARP‘s installed and torque started.
http://myndasafn.bmwkraftur.is/d/87904-2/rebuild015.jpg
Im hoping that im not screwing this up.. Anyway... ARP specifies 105feet-lbs which is around 142nm and that is alot, strangely enough I do not have the 2x90° procedure. I went to 40nm (double checked) then to 70nm, then 100nm and finally to 142nm, waiting 12hours between torques. Im going to retorque tomorrow before I install the cams.
ITB‘s in place!
http://myndasafn.bmwkraftur.is/d/87963-2/rebuild2002.jpg
http://myndasafn.bmwkraftur.is/d/87942-2/rebuild2003.jpg
Thermostat and housing, oil feed and drain to turbos, ICV and other minor stuff hooked up, downpipes attached to the exhaust, charge pipes to Intercooler and cold air to turbos all donw.
http://myndasafn.bmwkraftur.is/d/87957-2/rebuild2001.jpg
http://myndasafn.bmwkraftur.is/d/87951-2/rebuild2006.jpg
Tomorrow I will install the camshafts and vanos, do a secound round of the valve adjustments, install the cooling system and airbox, the new set of Denso Iridium plugs, Castrol Edge 10w-60 along with some distilled water for the first heat cycle. Hopefully it will start.
Not to overcomplicate and add stuff to go wrong, I will start using the 440cc‘s and then upgrade. After the install the car will be re-tuned.
As I said.. first time pulling the top end, and first time install..

:redspot

gstuning

09-04-2010, 09:55 PM

I look forward to coming to Lux and picking this up for dyno tuning at my place

:redspot

GasFed m3

09-06-2010, 01:02 AM

Hova

09-06-2010, 01:52 AM

I remember watching a video of your car on a track.

Hands down one of my favorite cars on this forum.

Good luck on the build :) I will be keeping an eye on this one.

GT110

09-06-2010, 03:18 AM

I never got good results using oem gasket and found the cooling system would start to pressurize at 15psi. After the third or forth blown head gasket I decided to rebuild motor and use pyramid rings with oem gasket and have not had any issue's since then.

Which standalone have you decided on? I am in the process of changing from the autronic sm4 to link g4 extreme which is far better suited for the s50-54b30-32

What clamping force did you have on the OEM gasket (studs and foot-lbs). I believe that the ARP2000's and 105ft/lbs will hold up as long as the tune is ok.

I will not be going for a standalone, the OEM BMW ecu was tuned for the 12psi, then on top I added the Moristech Pro Sequential Interceptor, allowing for manipulation of ignition and fuel.

Im adding a standalone knock-detector from Knock Link.

GasFed m3

09-06-2010, 05:43 AM

GT110

09-06-2010, 06:50 AM

The last time it blew was with arp 2000's with 30ft/lbs + 90' +90' at 23psi using 102 octane fuel, when the motor was opened there where no signs of detonation at all, like I said since pyramid ring setup even after spirited driving once the motor has cooled there is no residual pressure left in cooling system +-2yr's now

Maby I just had bad luck with the oem gaskets!

Pyramid rings would be the way to go.. maybe next time :alright

Im in the final stages of the re-assembly, some minor problems timing in the cams and maybe bit of valve adjustment and then its just fluids, plugs and fire it up.

GT110

09-11-2010, 03:08 PM

And it runs! pretty good actually.

Finally managed to do the valve adjustment propertly, timed in the cams and VANOS, installed the valve cover and put 7Liters of Castrol EDGE Sport 10w60 and turned the engine over, sounded good.. Proceded with installing the Denseo Irididium's at stock gap, cooling system installed and 10L of Distilled water for the first heat cycle.

TURNED the key...

AND.. it fired up perfectly actually.. idled at 800-ish rpm at 1.0Lambda.

Only thing left is putting on the hood and going for a drive.

Must admit, I am one proud sonbitch.. first time ever changing the HG of any engine. The S50B30 is not the most simple one to start with.

LukeG

09-11-2010, 10:48 PM

Congrats and great work!

How nervous were you when it came time to crank it over? :D

milKt

09-11-2010, 11:09 PM

Must admit, I am one proud sonbitch.. first time ever changing the HG of any engine. The S50B30 is not the most simple one to start with.

Self esteem for you...
I know the feeling.

Its not that difficult,
its more of a COURAGE to take it on

GT110

09-12-2010, 02:07 AM

Congrats and great work!

How nervous were you when it came time to crank it over? :D

On a scale of 1-10, about 12 :eyecrazy

Anyway.. >Pix
http://myndasafn.bmwkraftur.is/d/88097-1/Rebuild313.jpg
Cam Tray in place

http://myndasafn.bmwkraftur.is/d/88100-1/Rebuild314.jpg
Cams and VANOS installed and timed

http://myndasafn.bmwkraftur.is/d/88103-1/Rebuild315.jpg
http://myndasafn.bmwkraftur.is/d/88106-1/Rebuild316.jpg
Done visually, might be some ° off, I hope not

http://myndasafn.bmwkraftur.is/d/88115-1/Rebuild319.jpg
special cam locking tool :D

http://myndasafn.bmwkraftur.is/d/88121-1/Rebuild321.jpg
http://myndasafn.bmwkraftur.is/d/88124-1/Rebuild322.jpg
Ready to turn over

http://myndasafn.bmwkraftur.is/d/88127-1/Rebuild323.jpg
Only thing left is the Hood and a test run to see if everything is ok....

LukeG

09-12-2010, 08:42 AM

Hope everything goes well, you car is very nice.

highboostingm3

09-12-2010, 11:55 AM

Fantastic DIY job! Congratulations! :buttrock

Thanks for all the pics. :eatpop:

GT110

09-12-2010, 12:22 PM

Swapped in the 750cc's and tuned off-boost and idle. The car seems to be good. Power is fantastic :D.

I had some fuel leakage on the 440's and it was quite clear what was wrong.
http://myndasafn.bmwkraftur.is/d/88136-1/injectors006.jpg
http://myndasafn.bmwkraftur.is/d/88139-1/injectors007.jpg

http://myndasafn.bmwkraftur.is/d/88156-1/injectors005.jpg
OUT with the old IN with the new

http://myndasafn.bmwkraftur.is/d/88145-1/injectors001.jpg

http://myndasafn.bmwkraftur.is/d/88150-1/injectors003.jpg
8)

And the next project !
http://myndasafn.bmwkraftur.is/d/88153-1/injectors004.jpg
Getrag 6speed swap for my Mini Cooper, throwing away the shitbox named Midland.

milKt

09-12-2010, 02:51 PM

Are those HIGH or low impedance RC's you're using with the Euro DME?

GT110

09-13-2010, 05:39 AM

Are those HIGH or low impedance RC's you're using with the Euro DME?

It´s these

http://www.rceng.com/Saturated-Injector-SH4-0750-P63C6.aspx