35d worsening gas mileage - solved- thermostat/fan/EGR cooler - DIY with pics

[deptrai]

Started the teardown while waiting for my tools to come in. I broke the hose coming from the EGR cooler (passenger side) to water pump. When I disconnected it, I pulled it away to direct the coolant into my drain pan and away from the belt. It isn't very flexible. Heard and felt a crack/snap. $40 later, a new one will be here in a few days from ECS Tuning. They had the best price ($20) on coolant so it kinda worked out...free shipping over $49.

[deptrai]

Anyone know how to remove and reinstall this water hose? Its the one that connects the passenger side EGR cooler to the water pump. I got the thermostat off, but this hose is different than anything I've seen. It rotates freely as can be seen in the video. That hard plastic pipe blocks some of the view and it looks like I have to remove several other things to remove it. The end I'm referring to is circled in red.

https://youtu.be/8kD72W-DpzI

Here is the part on ECS tuning: https://www.ecstuning.com/b-genuine-...e/11537795135/

[Best4x4xFAR]

I could be wrong, but it looks to me like you need to us a pick tool to pull the clamp and release it, at which point the hose should just come right off..

You will probbably have to rotate the hose till you can reach and pull the clip..

From the ECS Part Photos..

[deptrai]

Thanks, Scott. I'm hopeful that is the case. The end of the hose that is already removed is that way, but it doesn't really look like the opposite end is the same. The ECS Tuning stock photos show both ends being the same, or did they just use the same photo twice?

Anyway, the replacement part arrives Friday and I'll be able to tell for sure then.

EDIT: Both sides of that hose have the identical fastening clamp. Easy to remove and re-install the new hose.

[POBEP]

Got "lucky" with SCR Cat - it got replaced under federal emissions warranty:

[ninja_zx11]

Hi all,

Thanks to sgrice again for the write up!! Did my thermostat and Glow plug module again after 9 years and 110,000kms. Temp was staying 70~72 degC from the last year . Every year it was dropping 2~3 deg since I put new thermostat 9 years ago. Last time I ordered genuine BMW thermostats ( main and transmission cooler ) and right after the replacement it was barely keeping at 88C. I would say 86~87C.

But this time, I ordered Mahle thermostat (made in Italy) from FCP euro and so far its keeping the temp 88C~89C. But time will tell. This time I didn't change the transmission cooler thermostat. The genuine one that I took out was not stuck open. I also tested it by putting it in a hot water and it was opening at around 86~87C. I think even though it was opening at 88C, it's spring looses tension over time and can't withstand the coolant pressure and opens up too early.

Regarding the glow plug module, I was getting Cylinder 2 glow plug error. I checked the resistance and all 6 were same. So i left the glow plugs as is it. It did clear up the error. Hope it stays like that

Suggestion: Try to tap the holes (to clean out carbon and debris) of the exhaust manifold where EGR cooler connects and use nickel based anti seize. Also clean the steel screw threads with brush It will help next time.