E28 Alpina Build - by Pedi

7 minute(s) of a 417 minute read

Been a while since last update, I have been @ work, and kinda busy lately. But here are some pics for some peoples amusement...




New pump...





Checked the new pumps clearances ofcourse...






Sump fixed, ready for startup...


Oil pressure cold engine is aprox 2 bar, high revvs makes 4+ bar.






Warm engine does not make more than 0.4-0.7 bar idle. Higher revvs 2-3 bar.... No good...







Engine bay:










Bought some new hats.





Needs some adjusting





Paint-mark the rubber ring, and cut it away







Done







With paint, it looks like stock.







Some work with instrument... All was f**ked up, so tried to find some parts that works...












Ribbon-cable could be a PITA sometimes...






Needed some 1.2v rechargeable batteries...


Cluster demolished






Main printcard, checked and clear.






SI-board hidden beneath main board






Take away ribbon-cables






Here you see the SI-board.







Got some assistance from my friend while I was doing something else







2 new batteries...





Made a bypass past the SI-board, due to defectives. 12v +, 12v -, and speed input - just to activate speedo.






Wires







Testing









Works?





Oh yess!


Car needed to see some fresh air...







Had a test-run w/o windows and everything. Just wanted to feel the wind...

Have a short clip here, please nevermind the "sqoink-sound", it is just a handbrake-issue that I have not looked at yet. Nothing special, just good to see it moving...




As I have too low oilpressure, I wanted to double-check the bearings,





Plastigauge:





Checking:







Status Quo:

Main bearing 1: between 0,038-0,05mm
Main bearing 2: between 0,05-0,076mm
Main bearing 3: 0,05mm
Main bearing 4: 0,05mm
Main bearing 5: between 0,025-0,038mm
Main bearing 6: between 0,025-0,038mm
Main bearing 7: between 0,038-0,005mm

Got hold of some original BMW oversize color-coded bearings. 1 set blue, and 2 sets of red





New sparkplugs was needed, damn, those were expensive!!


"Old" bearings






Most "worn" bearing:






With new bearings, clearances are now 0,03mm-ish. Perfect:






Sparkplugs, special for Alpina B7






What the...???





Never seen such spark plugs before....


But still: oil pressure warm engine: 0,4-0,5 bar idle, 1.8 bar @ 2000 rpm and 2+ bar @ 4000 rpm.


Visiúal inspection of the internals in the head.





Nothing to find.


I used a jumper between 11 and 14 in the diagnostic plug to run the startermotor w/o activating anything else. Nice tip, huh?





Found nothing there...


Oil filter housing, checking:





Here it comes oil almost at once, out from the fittings away from block. Plugged the hole just to check if pressure comes earlier og gets higher.





Nope, same low pressure, and it takes looong time to get pressure.


Anyone have any clue here???


It really takes some time to get oil pressure (feels like I am filling a kind of reservoar every time...), and when it finally comes, we are talking 0.3 bar pressure when just using the startermotor. It should have been ca 1.0 bar when using the starter.