LAN e9 empresas y tribulaciones, an epiphany in 042BBlau. OPUS MAGNA. XXXXXXXXXXXXXXXXXXXXXXXXXX

Some bits to improve,…


1687210895339.jpeg
 
valve gap adjustment

As engine is easy to access now I performed a valve gap adjustment






786B95DE-1295-46AF-AE28-ABD590C2F1BD.jpeg



as usual , the bent tool, plus feeler gauges 0,25 and 0,30mm, a torque wrench equipped with special open end (nuts @10N.m), permanent markers, a 36 vase for the crankshaft nut, and an M10 combined wrench

19856FB2-F495-4A17-9EE9-3114C7D17272.jpeg
163487C7-AF27-4C84-8B20-7ED4B90A976B.jpeg


first action was to replace all nuts with new ones from bmw

FDD0FC41-A10C-456D-AB88-CBCFC5E746E6.jpeg




E3BBD516-D4A9-4337-B0FE-3341A7D99D64.jpeg


sequence for cylinder with closed valves in OT, from one to another remember to turn engine always clockwise when looking at engine from the front of the car

AE680F79-C386-4292-BF2F-F7601E4ED750.jpeg



i found particularly interesting to proceed this way:

00382FB5-5FD7-4ABD-BE97-EAFF1E99D641.jpeg


For a given cylinder choose a valve, exhaust or admission both go at 0,25 to 0,30mm gap

place the 0,25 feeler gauge between camshaft and rocker,

Using your less able hand, press the rocker with one finger to ensure gauge trapped and secure

use the bent tool to force the eccentric to contact the valve, apply pressure with a finger of same hand to secure it

With your dominant hand fix the nut, try not to change the setup, not to put pressure on the valve spring

check The gap at the valve end, if 0,25 slides well and 0,30 can’t, that one is good,

now I use the torque wrench to apply 10N.m to the nut that fix the eccentric

finally paint one mark on the rocker, and move onto the next one

D725577A-B7E8-4F58-8ECF-30786DDDA850.jpeg


once all cylinders done, I give two turns to the cranckshaft and I check it again, placing a different color mark on each rocker


i found this way much more reliable to get equivalent results at all valves, I know that gap value is not the same at camshaft than at valve, but as the result value is consistent between cylinders and any gap resulting value stands between 0,25 and 0,30 (0,30 gauge does not slide through opening), I am happy with this
 
Last edited:
If you put a .25 feeler gauge between the cam and the rocker, the resulting gap at the valve and rocker would be .315 (.25 x 1.26) and thus out of spec? A .2 gauge at the cam would give you .25 at the valve which is right between the range.
 
Last edited:
If you put a .25 feeler gauge between the cam and the rocker, the resulting gap at the valve and rocker would be .315 (.25 x 1.26) and thus out of spec? A .2 gauge at the cam would give you .25 at the valve which is right between the range.
I appreciate your math Steve, for sure you are right, but my experience has been that using 0,25 at the cam, the resulting gap at the valve is something between 0,25 and 0,30, because the 0,30 feeler gauge can not go through that gap
 
I appreciate your math Steve, for sure you are right, but my experience has been that using 0,25 at the cam, the resulting gap at the valve is something between 0,25 and 0,30, because the 0,30 feeler gauge can not go through that gap
If you put a .25 feeler gauge between the cam and the rocker, the resulting gap at the valve and rocker would be .315 (.25 x 1.26) and thus out of spec? A .2 gauge at the cam would give you .25 at the valve which is right between the range.
what is the last consensus about the best valve gap ?
should it be a closer one like 0,25 or the wider one like 0,30 ?

i recall that we found that warm engine closes the gap
 
The gap spec in inches is .010" - .012" and I have always aimed for .010" to minimize but not eliminate valve noise (no noise = too tight). Plus I figure the gap will wear larger over time. Also to consider is supposedly larger gap improves idle quality but hinders high rpm efficiency.
 
The gap spec in inches is .010" - .012" and I have always aimed for .010" to minimize but not eliminate valve noise (no noise = too tight). Plus I figure the gap will wear larger over time. Also to consider is supposedly larger gap improves idle quality but hinders high rpm

I will note this for the 1000km check
Thanks
 
the motor mounts:

i can only set the LH due to RH used for motor stand

1687853913712.png



and this goes up

1687853948105.png



1687854466531.png


i know the stop plate does nothing in my setup, but it looks soo cool; i used 5mm extra length in those two bolts; i know is almost only shear force, but there was enough thread free and depth i couldnt resist (freak overkill)

1687853999179.png




creeping towards completion
 
Last edited:
Back
Top