What did you do to your car today?

Aus335iguy · 07-03-2019, 03:48 AM

Quote:

Originally Posted by Brule

Quote:

Originally Posted by Coupes33

Today, I started my car which has been off the road for about 3 months or more replacing the engine with a second hand one I bought off Duck. Also, I replaced the transmission with my original transmission which has been upgraded by Nizpro. Also, I changed the gearing in the diff from 3.46 to 3.25 which should allow me to rev to about 6,300rpm in 4th across the line instead of 7,000rpm. As I had the engine out, I replaced the index 10 injectors with 12's, replaced the HPFP and replaced the injectors in the PI as the one on cylinder 5 looked like it wasn't working. When I get a chance, I will get them all tested. Engine started ok with no oil or water leaks and on its maiden drive ran smooth. I will take it for a longer drive tomorrow as I have to run in the transmission for a while so that it gets adapted to my style of driving. I reinstalled xHP and the stage 3 tune in the transmission.

Nice.
Hope to see the new drag times soon.

Cylinder 5 eh coupes?
Nearly (not all) N54 engines that i have seen blow up have some kind of issue on cylinder 5.
It may not be the case here but the theory goes that its a factor of the inlet manifold design causing uneven cylinder filling. A forward facing throttle seems to alleviate the issue. Just my 2c

Coupes33 · 07-03-2019, 04:23 AM

Quote:

Originally Posted by Brule

Nice.
Hope to see the new drag times soon.

Yes Brule. Hopefully, by the end of the month, it should be right to go.

Coupes33 · 07-03-2019, 04:35 AM

Quote:

Originally Posted by Aus335iguy

Cylinder 5 eh coupes?
Nearly (not all) N54 engines that i have seen blow up have some kind of issue on cylinder 5.
It may not be the case here but the theory goes that its a factor of the inlet manifold design causing uneven cylinder filling. A forward facing throttle seems to alleviate the issue. Just my 2c

Yes Aus335, No 5 cylinder appears to be the cylinder that fails for some reason. Some say, it has something to do with the knock sensor being bolted opposite No 5. I haven't as yet taken the oil pan off to see what lies below. You can see by the attached photos that No 5 combustion chamber is oily compared to the others. The bore for No 5 has a mark but no groove. Actually, all the cylinders look very good for 134,000kms. The hone marks can still be seen and there is no lip on any cylinder. I suspect there may be a broken or faulty oil ring on No 5. When I disassemble the bottom end, I will find out.

Coupes33 · 07-07-2019, 04:27 AM

Today, I completed pulling my old engine apart to find what was causing the oil problem in cylinder 5. An inspection of all the pistons at the top of there stroke revealed the piston in cylinder 5 was not totally square with the bore. In other words, when the front edge of the piston was flush with the top of the block the rear edge was slightly down the cylinder. All other pistons were flush all round with the top of the block. When I removed the No 5 piston, I found the rings were all ok but there was a slight bend in the conrod towards the piston end. I can only assume that with the piston at a slight angle, oil was getting past the rings into the combustion chamber. What caused this is a mystery. It has been quite educational seeing how well engineered these engines are. I have never seen in any other engine I have built, the joining faces between the conrod and the cap anything like these. The photos will explain what I mean. How they are made is also mystery. Believe it or not but these faces join flush as.

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vtl · 07-07-2019, 06:07 AM

Those are forged rods that are made in one piece. An engineered weak point is made where the join is and is broken off. Result is a rod cap that located perfectly and is strong, and not too expensive to make. Pretty common for OEM forged rods.

Coupes33 · 07-07-2019, 03:38 PM

Quote:

Originally Posted by vtl

Those are forged rods that are made in one piece. An engineered weak point is made where the join is and is broken off. Result is a rod cap that located perfectly and is strong, and not too expensive to make. Pretty common for OEM forged rods.

Thanks Vince for the explanation. I have never seen it before.

Aus335iguy · 07-08-2019, 05:07 AM

This is great info Coupes and Vince. Anyone have any ideas what could have cause this ?

Brule · 07-08-2019, 05:58 AM

The torque would bend the rod.
Especially low rpm big torque.

Aus335iguy · 07-08-2019, 04:26 PM

Quote:

Originally Posted by Brule

The torque would bend the rod.
Especially low rpm big torque.

There didnt seem to be signs of detonation on the piston so that sounds like it fits.

vtl · 07-08-2019, 06:26 PM

Bent rods could be leaking injectors or meth (fuel is not compressible), or just lots of knock.

If a JB4 was used, "autotune" map5 effectively just increases boost until the engine knocks, and DME pulls timing constantly to stop itself from blowing up. Always wonder what the long term effects of this is.

Coupes33 · 07-08-2019, 08:52 PM

Quote:

Originally Posted by vtl

Bent rods could be leaking injectors or meth (fuel is not compressible), or just lots of knock.

If a JB4 was used, "autotune" map5 effectively just increases boost until the engine knocks, and DME pulls timing constantly to stop itself from blowing up. Always wonder what the long term effects of this is.

The injector for cylinder 5 didn't look that good on the end but I put that down to the oil. There were no fault codes indicating an injector issue. The injectors were Index 10 originals. I have now replaced them with new Index 12 injectors. Another issue was the PI injector for cylinder 5 didn't look like it was working so I have replaced all of the PI injectors as well. I have never run JB4. I use MHD with custom tune. On another forum, the failure of cylinder 5 has been linked with the knock sensor location adjacent cylinder 5. I am not sure how it is related. Photos of PI injectors for cylinders 5 & 6. All of the others look the same as cylinder 6.

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Aus335iguy · 07-09-2019, 02:23 AM

Quote:

Originally Posted by Coupes33

Quote:

Originally Posted by vtl

Bent rods could be leaking injectors or meth (fuel is not compressible), or just lots of knock.

If a JB4 was used, "autotune" map5 effectively just increases boost until the engine knocks, and DME pulls timing constantly to stop itself from blowing up. Always wonder what the long term effects of this is.

The injector for cylinder 5 didn't look that good on the end but I put that down to the oil. There were no fault codes indicating an injector issue. The injectors were Index 10 originals. I have now replaced them with new Index 12 injectors. Another issue was the PI injector for cylinder 5 didn't look like it was working so I have replaced all of the PI injectors as well. I have never run JB4. I use MHD with custom tune. On another forum, the failure of cylinder 5 has been linked with the knock sensor location adjacent cylinder 5. I am not sure how it is related. Photos of PI injectors for cylinders 5 & 6. All of the others look the same as cylinder 6.

Attachment 2094903

Attachment 2094904

If anything having the knock sensor next to it would be a good thing I would've thought?

:

Coupes33 · 07-09-2019, 05:49 PM

Quote:

Originally Posted by Aus335iguy

If anything having the knock sensor next to it would be a good thing I would've thought?

:

Yes, you are probably right with that. With the N54 engine having 2 knock sensors, one adjacent to No 2 cylinder and the other adjacent to No 5 cylinder, you would wonder why No 5 cylinder has all of the issues. I am not aware how the 2 sensors work together. I would imagine if one sensor detects an issue, it retards the timing of the engine. I cannot see how a knock sensor can effect one cylinder.

jzx_andy · 07-12-2019, 11:08 AM

Got the motiv flex fuel kit and upgraded fuel lines in. Also bit the bullet on a cheap Combox - guess I'll have to get a full CIC retrofit happening soon

Aus335iguy · 07-12-2019, 04:19 PM

Quote:

Originally Posted by Coupes33

Quote:

Originally Posted by Aus335iguy

If anything having the knock sensor next to it would be a good thing I would've thought?

:

Yes, you are probably right with that. With the N54 engine having 2 knock sensors, one adjacent to No 2 cylinder and the other adjacent to No 5 cylinder, you would wonder why No 5 cylinder has all of the issues. I am not aware how the 2 sensors work together. I would imagine if one sensor detects an issue, it retards the timing of the engine. I cannot see how a knock sensor can effect one cylinder.

Me either. That's why i believe it to be a cylinder filling issue. I dont know how to prove it but if you look through threads around here and other places of blown engines the impression i get is that Cyl 5 seems to be the most prevalent.

R32GOJIRA · 07-14-2019, 12:41 AM

Quote:

Originally Posted by jzx_andy

Got the motiv flex fuel kit and upgraded fuel lines in. Also bit the bullet on a cheap Combox - guess I'll have to get a full CIC retrofit happening soon

Let me know if you want to go down that path as i have the components for a CIC Professional system for sale

Just need the wiring for it.

jzx_andy · 07-15-2019, 08:20 PM

Quote:

Originally Posted by R32GOJIRA

Let me know if you want to go down that path as i have the components for a CIC Professional system for sale

Just need the wiring for it.

What car did it come out of? I'm after a 2012+ unit

R32GOJIRA · 07-15-2019, 08:44 PM

Quote:

Originally Posted by jzx_andy

What car did it come out of? I'm after a 2012+ unit

Ah so you are after the NBT unit out of the F series for an upgrade then?
Mine is out of a 2008 335i.
Its the top version of the CIC I-Drive as far as im aware with the bigger screen, usb in glove box and center console and the built in hard drive to store your music on.

jzx_andy · 07-15-2019, 10:00 PM

Quote:

Originally Posted by R32GOJIRA

Ah so you are after the NBT unit out of the F series for an upgrade then?
Mine is out of a 2008 335i.
Its the top version of the CIC I-Drive as far as im aware with the bigger screen, usb in glove box and center console and the built in hard drive to store your music on.

Nah man I'm just after a CIC unit with the latest firmware. Funnily enough there are other BMW models that come with the same CIC unit and screen as the E9x 3er, and they were phased out much later than the e9x - 2015!

Just looking to do a bit of DIY and getting the latest maps and BMW apps working and trying to save the hassle of updating the firmware (you need a ~$1k ICOM cable to be able to update the CIC firmware reliably). PeterY mentioned a bit about it in his build thread on here!

Thanks for the offer though!

R32GOJIRA · 07-15-2019, 10:43 PM

Quote:

Originally Posted by jzx_andy

Nah man I'm just after a CIC unit with the latest firmware. Funnily enough there are other BMW models that come with the same CIC unit and screen as the E9x 3er, and they were phased out much later than the e9x - 2015!

Just looking to do a bit of DIY and getting the latest maps and BMW apps working and trying to save the hassle of updating the firmware (you need a ~$1k ICOM cable to be able to update the CIC firmware reliably). PeterY mentioned a bit about it in his build thread on here!

Thanks for the offer though!

Ah well there you go.
Good luck with the hunt bro

rev210 · 07-16-2019, 02:18 AM

More twisted tuning logs this week thanks to fine weather. Still trying to figure out whats up with the MHD FF accuracy with United E85 ,tho. Its reading E 78-80 vs my stand alone zeitronix , that is saying E.83-85. This is 3rd revision FF with a lower 20psi target and 6deg to sort out some mid response Vs the 10sec run prior revision at 24psi and 6.8deg.
With the E85 sorted will eventually have a kill mode tune and then street 93 octane range dialled in.
Also fitting 1/4 dedicated vacume line for Tial BOV as the light throttle surge isnt great.

Montye90 · 07-17-2019, 06:45 PM

I’m bought, not built. Got Hills to install stage 2 fuelit and motiv flex sensor and flex box, but can’t seem to get ethanol content reading on MHD logging. Anyone else had this problem? Took it back to Hills, triple checked and same problem. MHD has been trying to help, but no response from Motiv which I think is normal... thanks in advance...

07-07-2019, 04:27 AM	#1456
Coupes33 Major 374 Rep 1,392 Posts Drives: 2006 335i, 2017 Audi S3 Join Date: Aug 2013 Location: Brisbane, QLD, Australia iTrader: (0)	Today, I completed pulling my old engine apart to find what was causing the oil problem in cylinder 5. An inspection of all the pistons at the top of there stroke revealed the piston in cylinder 5 was not totally square with the bore. In other words, when the front edge of the piston was flush with the top of the block the rear edge was slightly down the cylinder. All other pistons were flush all round with the top of the block. When I removed the No 5 piston, I found the rings were all ok but there was a slight bend in the conrod towards the piston end. I can only assume that with the piston at a slight angle, oil was getting past the rings into the combustion chamber. What caused this is a mystery. It has been quite educational seeing how well engineered these engines are. I have never seen in any other engine I have built, the joining faces between the conrod and the cap anything like these. The photos will explain what I mean. How they are made is also mystery. Believe it or not but these faces join flush as.
	Appreciate 0 Quote

07-07-2019, 06:07 AM	#1457
vtl Brigadier General 1493 Rep 3,148 Posts Drives: 2008 BMW 135i MT Join Date: Apr 2015 Location: Melbourne, Australia iTrader: (0)	Those are forged rods that are made in one piece. An engineered weak point is made where the join is and is broken off. Result is a rod cap that located perfectly and is strong, and not too expensive to make. Pretty common for OEM forged rods.
	Appreciate 1 Aus335iguy650.00 Quote

07-08-2019, 05:07 AM	#1459
Aus335iguy Colonel 650 Rep 2,139 Posts Drives: 2009 e92 335i MSport DCT Join Date: Jul 2015 Location: Sydney Aus iTrader: (0) Garage List 2009 BMW 335i [10.00]	This is great info Coupes and Vince. Anyone have any ideas what could have cause this ? __________________ When you doppelkaplung you doppel your fun.
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07-08-2019, 05:58 AM	#1460
Brule Brigadier General 827 Rep 3,189 Posts Drives: 2007 335i e92 6spd man Join Date: Jul 2013 Location: Darwin iTrader: (0)	The torque would bend the rod. Especially low rpm big torque.
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07-08-2019, 06:26 PM	#1462
vtl Brigadier General 1493 Rep 3,148 Posts Drives: 2008 BMW 135i MT Join Date: Apr 2015 Location: Melbourne, Australia iTrader: (0)	Bent rods could be leaking injectors or meth (fuel is not compressible), or just lots of knock. If a JB4 was used, "autotune" map5 effectively just increases boost until the engine knocks, and DME pulls timing constantly to stop itself from blowing up. Always wonder what the long term effects of this is. __________________ Build Thread
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07-12-2019, 11:08 AM	#1466
jzx_andy Slowpoke 245 Rep 291 Posts Drives: 2008 E92 335i N54 Join Date: Jul 2018 Location: Perth, Australia iTrader: (0)	Got the motiv flex fuel kit and upgraded fuel lines in. Also bit the bullet on a cheap Combox - guess I'll have to get a full CIC retrofit happening soon __________________ build thread - OEM+ WIDEBODY \| Factory Individual Audio, Active Steering, Comfort Access & M-Sport optioned 6MT swapped \| Xtreme twin disk & SMF \| Advan RSII \| ST XTA \| F82 M4 heated front seats \| BMW Individual interior trims \| CIC/Combox retrofits \| Custom headlights \| 1M/M3 mirrors \| 335is auxiliary radiator \| LCI tails
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07-16-2019, 02:18 AM	#1473
rev210 Private 49 Rep 88 Posts Drives: 335i 2008 Join Date: Oct 2018 Location: Perth iTrader: (0)	More twisted tuning logs this week thanks to fine weather. Still trying to figure out whats up with the MHD FF accuracy with United E85 ,tho. Its reading E 78-80 vs my stand alone zeitronix , that is saying E.83-85. This is 3rd revision FF with a lower 20psi target and 6deg to sort out some mid response Vs the 10sec run prior revision at 24psi and 6.8deg. With the E85 sorted will eventually have a kill mode tune and then street 93 octane range dialled in. Also fitting 1/4 dedicated vacume line for Tial BOV as the light throttle surge isnt great.
	Appreciate 0 Quote

07-17-2019, 06:45 PM	#1474
Montye90 Private First Class 24 Rep 190 Posts Drives: BMW 335i 2007 Join Date: Apr 2016 Location: Australia iTrader: (0)	I’m bought, not built. Got Hills to install stage 2 fuelit and motiv flex sensor and flex box, but can’t seem to get ethanol content reading on MHD logging. Anyone else had this problem? Took it back to Hills, triple checked and same problem. MHD has been trying to help, but no response from Motiv which I think is normal... thanks in advance... __________________ BMW 335i October 2007 Build. VR Speed down pipes, heat coated by HiOctane, BMS DCI, MHD Stage 2, Index 12 Injectors, Eldor Coils. RB Outlets & Inlets installed. Wagner Evo 2 Comp installed, Charge pipe with Tial BOV installed. Stage 2 lpfp installed. Motiv ethanol sensor and flex fuel installed. MHD v8 stage 2+ e50 map installed.
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