Author Topic: 1993 318i M42 Engine noise with video (Read 11408 times)

B318M42W · « **Reply #15 on:** April 01, 2009, 03:57:17 PM »

Quote from: beemer1;69237

I found the oil pump sprocket was loose when I did the timing chain. I don't know if that contributed to the busted guides. The sprocket was floping around almost totally uncrewed :eek:

Steve

in an E36 M42???

beemer1 · « **Reply #16 on:** April 01, 2009, 04:17:52 PM »

Nope E30 m42. I just re-read the first post and saw its an E36 m42...I must be getting old :rolleyes:

carl6405 · « **Reply #17 on:** April 01, 2009, 06:01:21 PM »

Beemer
Im kind of thinking that I will see that problem too when we get in to it. The article in my 101 projects book says that they have been seeing the loose nut on the oil pump sprocket quite a bit. Weve determined that my engine already has a new chain and guides, as well as new timing chain gears/sprockets. So, looks like the previous owner was chasing this problem down too.

nicknikolovski · « **Reply #18 on:** April 02, 2009, 02:22:45 AM »

The M42 oil pump has NOT got a sprocket and nut.

beemer1 · « **Reply #19 on:** April 03, 2009, 03:06:03 PM »

Quote from: nicknikolovski;69263

The M42 oil pump has NOT got a sprocket and nut.

The sprocket on the bottom of the pic was the one that was loose. Chilton said it was the oil pump sprocket and therefore I assumed it was it.

Steve

B318M42W · « **Reply #20 on:** April 03, 2009, 08:10:56 PM »

loll... oil pump sprocket... that idler gear is on a set of bearings of it's own. and great find by the way!

beemer1 · « **Reply #21 on:** April 03, 2009, 08:49:40 PM »

Learning as I go...

carl6405 · « **Reply #22 on:** April 04, 2009, 09:13:43 PM »

Hey guys,

After a long day and much work, I finally got the lower cover off. I thought, that I would have been able to replace the oil pump from the front, but by the looks of it, Im going to have to pull the oil pan off. This is not something, I wanted to do. The main cross member is in the way. I will have to find a way to hold the engine in place while I unbolt the cross member so that I can get access to the oil pan bolts. Anybody got any tips for this.

Here is a pic of my lower chain guides. Can you guys tell by the pic, if the chain guides look ok?

Thanks
http://i417.photobucket.com/albums/pp255/carl6405/lowercover.jpg
http://s417.photobucket.com/albums/pp255/carl6405/?action=view¤t=lowercover.jpg" target="_blank">

http://i417.photobucket.com/albums/pp255/carl6405/lowercover.jpg" border="0" alt="Photobucket">

derek9702 · « **Reply #23 on:** April 05, 2009, 08:52:28 AM »

In order to access the oil pump, you will have to remove the cover that the guides attach to, the oil pump is housed in it. While at it, you should replace the oil pressure control valve. OEM is metal, it has been superseded by plastic. The metal has a tendency to seize in the bore, then you have no oil pressure.

Attached is the cover and the oil pump link:
http://www.realoem.com/bmw/showparts.do?model=CA63&mospid=47490&btnr=11_1120&hg=11&fg=30

carl6405 · « **Reply #24 on:** April 05, 2009, 09:23:59 AM »

Derek
Do I have to drop the oil pan to remove this cover?
That is a good reccomdation. I never knew there was such a part. Where is oil pressure control valve located? In this, it looks like I will definately, have to remove the timing chain and all the guides as well. Is that correct?

carl6405 · « **Reply #25 on:** April 05, 2009, 09:25:45 AM »

I see the control valve now. Its #5 in the diagram that is posted here.

derek9702 · « **Reply #26 on:** April 05, 2009, 11:38:50 AM »

You will have to remove the bolts at the front of the pan. 4 or 5 iirc.

carl6405 · « **Reply #27 on:** April 05, 2009, 11:50:27 AM »

Derek, by looking at those bolts, theres about 1.5" of space to back those bolts out, before they touch the cross memeber, thats holding up the engine. Will I still have to remove the cross member? If I do, then Im looking at having to hold that engine up somehow when I unbolt the cross member.

derek9702 · « **Reply #28 on:** April 05, 2009, 03:27:11 PM »

Yes you will. I used a jack right where the engine and tranny meet. It supported it fine. Later on however, I went ahead and pulled the engine out. I was replacing a broken piston, due to my guides shattering. That's when I discovered that it also took out the bosses that the guides bolt to. M42s are the gifts that keep giving.

carl6405 · « **Reply #29 on:** April 10, 2009, 12:29:06 PM »

Im getting closer to getting to the oil pump. Today, I removed the alternator and the oil filter housing. Removing the oil filter housing reveals part of the problem. SERIOUS SLUDGE. Check out the pics I took of it. It was worse, my wife removed some of it before I took the pictures. Yes, she is helping me.
http://i417.photobucket.com/albums/pp255/carl6405/oilfiltermount.jpg
http://i417.photobucket.com/albums/pp255/carl6405/OilFilterHousing.jpg