Author Topic: oil-pump upgrade (Read 7229 times)

swiss318is · « **on:** March 18, 2008, 05:10:24 AM »

we all know that the oil-pump on a m42 engine is not the best one... is there any possibility to upgrade..?? better flow... etc... maybe the pump out of an other engine?? please dont tell me "drysump blabla ..." ;-)

did you have any failure with the stock pump?? post pics...

i want to know anything BEFORE i begin to rebuild my engine..

swiss318is · « **Reply #1 on:** March 18, 2008, 10:44:01 AM »

hmm...it seems that everybody is thinking on more power, strokers, turbos, NOS?, bigger, better, faster, stronger etc... but this small rotating thing.. called oilpump...??one of the weakest points...

kowalski · « **Reply #2 on:** March 18, 2008, 11:39:35 AM »

i'm not really sure what you could do besides an externally mounted unit. I'm not sure why your so hell bent on changing it..? mine's lasted almost 300,000 km's so I don't see the huge fuss? if anything you might want to upgrade the plate that the oil pump sits in so that it doesn't crack.

swiss318is · « **Reply #3 on:** March 18, 2008, 12:00:16 PM »

i heared about problems with highreving engines. Under long high-RPM runs the stock oilpump-gears spin so fast that the gears expands, which destroy the oilpump and if the pump is spinning too fast it cant transport the oil anymore... its called cavitation

swiss318is · « **Reply #4 on:** March 18, 2008, 12:02:13 PM »

i dont want to change the oilpump, but perhaps there is something to improve it...

DRtothE · « **Reply #5 on:** March 18, 2008, 12:39:09 PM »

start with the basics, i can't figure out whether it's driven by the timing chain or belt driven.....

swiss318is · « **Reply #6 on:** March 18, 2008, 12:44:34 PM »

the crankshaft goes directly through the oilpump... no chain, no belt...

swiss318is · « **Reply #7 on:** March 18, 2008, 12:50:37 PM »

NOT GOOD AT ALL!!!!!!!!

DRtothE · « **Reply #8 on:** March 18, 2008, 01:33:32 PM »

i'd imagine that the conditions for that broken set rotor were an extreme incident with a ridiculous amount of heat and friction (nowhere near what i think the average driver would put on their M42). I can also see how addressing problems before these babies become classic, and the years afterward, cause i'm not getting rid of mine. But, that's all beside my point, and i don't know the inner workings of the pump enough to give you an answer, external mounting sounds like an idea.....

gearheadE30 · « **Reply #9 on:** March 18, 2008, 01:45:03 PM »

I'd call Metric Mechanic; they seem to have the best working knowledge for info on modifying this motor.

D. Clay · « **Reply #10 on:** March 18, 2008, 04:36:49 PM »

Longitudinal movement of the crankshaft due to thrust bearing wear has been known to damage the oil pump.

Cobra Jet · « **Reply #11 on:** March 18, 2008, 07:33:29 PM »

The pics above of the oil pump gears - there are two different sets of gears pictured, is one set a revised set?

I understand wanting to protect the engine or upgrading the oil pump, but it seems many folks hardly ever have issues with the oil pump (unless the car/engine was abused or had a lack of maintenance), especially a daily driver. The busted gears above had to have occured under EXTREME and constant RPM & MPH...

swiss318is · « **Reply #12 on:** March 19, 2008, 01:55:14 AM »

Quote from: Cobra Jet;45050

The pics above of the oil pump gears - there are two different sets of gears pictured, is one set a revised set?.......The busted gears above had to have occured under EXTREME and constant RPM & MPH...

the pics are only examples of different cars...

yes, i am speaking of extended high rpm runs...!! ever driven in the swiss mountains? 20 to 30min full throttle to the top ... and then a small beer! ;-)

DRtothE · « **Reply #13 on:** March 20, 2008, 05:44:47 AM »

now are you just asking for a replacement part that won't break under stress, or a better way to deliver more oil?

swiss318is · « **Reply #14 on:** March 21, 2008, 04:00:06 AM »

i found a solution... will post some pics when finished..