M42 running VERY loud (video), low oil pressure light is on

[Vivek]

Could try it...any cons of doing so? Any idea how much oil I'd need? There's 5 quarts in there right now.

[uturn]

This might sound dumb so everyone chime in.... what about adding enough oil to the sump so that the level is as high as the oil pump?

[Vivek]

Any suggestions on pumping gear oil into the oil filter housing? I'm thinking get some 75w90, put it in through the oil presser sender hole. But I'd like to have a tight fit so i can pressurize it as much as possible. Maybe also turn the engine by hand while doing so?

Any tips? Last resort before I change the pump. Parts came in today but I have no time til next week.

[2mAn]

Vivek PM me and I'll try to connect you with Kevin (Gerta)

[wazzu70]

Definitely try and get this engine pumping first. Everything could be fine. At least then you will know if the engine was damaged and you can work on replacing it

[bmwman91]

No idea what the pump tool is or looks like, sounds like you gotta bug a couple of folks on here to find the owner.

[Vivek]

Where could I borrow a pump from? Is it like a powered spinning pump or just like a gun type thing like for grease? I just ordered the parts I need to replace the oil pump. Also got a magnetic oil drain plug so I can see if anything collects on it. If the pump works I'll do a compression test and check the drain plug. In all honesty this car will likely get an engine swap for more power after I graduate from college, and I probably won't be driving it in college, so the engine really needs to last like 10-20k.

[bmwman91]

Would it be worth it to try to start it up after doing this before replacing the pump? I PM'd the guy who posted that thread about the external pump, but he hasn't been online since last month so idk how often he'd check r3v.

Tough call. The engine has run a lot without oil already, but another 3-5 seconds might be fine. Pull the valve cover and get oil on all of the moving parts and down the chain. If it did work, then you probably wouldn't need to replace the pump rotors. Still, I think that your #1 goal should be to borrow the pump thing and get some oil in there before running it.

[bmwm42]

there are a few guys on the pnw chit chat thread the know kevin personally i used to have his number but lost it when i switched phones kid325e 2man pretty much anyone on there can get a hold of him for you

[Vivek]

+1

Also, if you have the filter housing off try pouring some 15W-50 down the oil passage to the pump to get those gears lubed and HOPEFULLY able to force some air out. Turn the engine with a wrench a few times to make sure that the oil has made it into there and coated all of the teeth on the rotors. Alternatively, if you can get a hold of that oil pump device, go that route instead.

Would it be worth it to try to start it up after doing this before replacing the pump? I PM'd the guy who posted that thread about the external pump, but he hasn't been online since last month so idk how often he'd check r3v.

[bmwman91]

The following animation should explain how to put oil down the pump outlet and what to look for.

[bmwman91]

I would definately pour oil over the cams before start up.

+1

Also, if you have the filter housing off try pouring some 15W-50 down the oil passage to the pump to get those gears lubed and HOPEFULLY able to force some air out. Turn the engine with a wrench a few times to make sure that the oil has made it into there and coated all of the teeth on the rotors. Alternatively, if you can get a hold of that oil pump device, go that route instead.

[Todd Black 88]

I would definately pour oil over the cams before start up.

[Vivek]

Nope, never touched the timing covers. Pumping oil in may be a possibility, I'll look into it and PM him. I just pulled the oil filter housing to see if anything looked off behind there (maybe I left a piece of a paper towel in or a gasket was pinched). Everything looked fine, other than the fact that the passage going from the filter to the rest of the engine is bone dry :/.

Plan of action now is to see if I can somehow pump oil in at high pressure, and then replace the pump if that either doesn't work or isn't possible. Is there anywhere I can pour oil that could help to lubricate the parts that aren't being lubed because oil isn't flowing?

[brads2002]

Did you replace any timing covers? I have heard of m42/44 getting confused. The m44 is slightly different bigger I think and it won't allow the pump to build pressure.