Author Topic: Timing Case / Oil Pump (Read 6047 times)

318ls · « **on:** October 01, 2012, 01:27:20 PM »

So... the Oil pump decided to take a "break" and take the timing case with it :mad:

Do you guys think I can repair the case? just don't know enough about the operation of the oil pump / rotary assembly- i.e. pressure apply to the case when it is turning...

Thanks!

monko141 · « **Reply #1 on:** October 02, 2012, 08:09:29 AM »

I would guess with that kind of damage to your oil case your crankshaft is toast too.

318ls · « **Reply #2 on:** October 02, 2012, 12:48:26 PM »

Well actually this is a case that I picked up, I have the unfortunate idler sprocket snaped situation... Luckily, the timing chain did not skipped a notch! So the oil pump and the crank shaft is fine on my original timing case. I just don't know if I should repair the oil pump section of the case that I picked up.

Here is what happened to my case:

colin86325 · « **Reply #3 on:** October 02, 2012, 01:11:37 PM »

You might look into upgrading to M44 timing case. You can find a thread or two about it on here. I can't recall which oil pump rotor to use though.

318ls · « **Reply #4 on:** October 02, 2012, 01:31:49 PM »

So colin86325, you don't think I should try to fix the 1 that I bought? It's probably pretty hard to score a timing case, let alone the later one where it is replaced with a rail instead of a sprocket...

It's frustrating!!!

colin86325 · « **Reply #5 on:** October 02, 2012, 06:31:19 PM »

I wouldn't try to repair that piece.

The M44 case is $255. Not cheap but I'd be worried about a repaired item breaking...

phoebus · « **Reply #6 on:** November 05, 2012, 08:43:22 AM »

I would use the later e36 M42 timing case. The M44 case doesn't have the mount for the crank position sensor. I know this from experience. I rebuilt my motor earlier this year and somebody in my shop threw away my original case. I used the M44 case from the donor block that I used the crank and rods from only to find that I had to fabricate a mount for the crank sensor. If you get the M42 case make sure to order the oil pump as well. The M44 gear will not work in the M42 case. It is thicker than the M42 gear.

romkasponka · « **Reply #7 on:** November 05, 2012, 11:00:03 AM »

Quote from: phoebus;117407

I would use the later e36 M42 timing case. The M44 case doesn't have the mount for the crank position sensor. I know this from experience. I rebuilt my motor earlier this year and somebody in my shop threw away my original case. I used the M44 case from the donor block that I used the crank and rods from only to find that I had to fabricate a mount for the crank sensor. If you get the M42 case make sure to order the oil pump as well. The M44 gear will not work in the M42 case. It is thicker than the M42 gear.

Is it possible to fit oil pump and case m44 but chain cover from M42?

phoebus · « **Reply #8 on:** November 06, 2012, 09:01:50 AM »

Quote from: romkasponka;117408

Is it possible to fit oil pump and case m44 but chain cover from M42?

No, because the original M42 case has provisions for the toothed gear that is in there and the M44 does not. I tried that too.

phoebus · « **Reply #9 on:** November 06, 2012, 09:04:48 AM »

The issue with using a M44 case on a M42 block is that there is no mount for the crank position sensor. Of course, if you are using the M44 block you are golden. Crank position sensor fits in the side of the block and pick's up it's signal from the wheel mounted to the crankshaft.

romkasponka · « **Reply #10 on:** November 06, 2012, 10:04:32 AM »

It is possible to weld/bolt bracket for sensor on the m44 cover, but I was thinking that M42 cover should fit on m44 oil pump casing. :mad: In this case proably I will have to buy full M44 engine. And the problem is that I do not have space in my garage

What kind of provision do you mean, because as I remember it is just cover?

bmwman91 · « **Reply #11 on:** November 06, 2012, 12:19:39 PM »

OP, there is no way to fix that timing case. I have actually had both of those failures hit me over the years. The blown oil pump is most likely due to the timing chain whipping around when the sprocket broke off and pieces of roller bearing fell into the oil pan. The useless screen on the inlet won't stop them from getting into the pump. Did you find all sorts of debris in the oil pan? Is there a small hole punched in the inlet screen? Did the pump blow up when you were red-lining the engine?

phoebus · « **Reply #12 on:** November 07, 2012, 10:27:24 AM »

Quote from: romkasponka;117435

It is possible to weld/bolt bracket for sensor on the m44 cover, but I was thinking that M42 cover should fit on m44 oil pump casing. :mad: In this case proably I will have to buy full M44 engine. And the problem is that I do not have space in my garage
What kind of provision do you mean, because as I remember it is just cover?

The problem with making a bracket is that it will never be mounted in the most accurate position for the sensor. M42 cover will NOT fit the M44 oil pump.

romkasponka · « **Reply #13 on:** November 07, 2012, 05:23:01 PM »

Quote from: phoebus;117473

The problem with making a bracket is that it will never be mounted in the most accurate position for the sensor.

It is not a problem with standalone ECU.

I think I will try to install m44 pump and some machining should help to clear space if there is some clearance issues in worst case I will make a bracket for a sensor.

318ls · « **Reply #14 on:** November 15, 2012, 04:58:38 PM »

Quote

OP, there is no way to fix that timing case. I have actually had both of those failures hit me over the years. The blown oil pump is most likely due to the timing chain whipping around when the sprocket broke off and pieces of roller bearing fell into the oil pan. The useless screen on the inlet won't stop them from getting into the pump. Did you find all sorts of debris in the oil pan? Is there a small hole punched in the inlet screen? Did the pump blow up when you were red-lining the engine?

The broken oil pump case was actually a used one that I bought to replace mine. My timing case took a dive with the idler sprocket mount broken off... Likely, I was able to find another M42 case with the oil pump in a single piece (well 2 pieces to be exact). Just got the case and timing components back in- Now I just need to find time to put everything else back together... Will let you all know how it goes!