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Super Moderator
2003 330cic, 2003 325iT
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6,961 Posts
Discussion Starter · #121 ·
Getting deep with an M54b30 engine I picked up for $350. Compression numbers were good and ran before removal, so I decided to take the risk.

Going to swap it in as part of an overall "make it a 330" theme.

So far so good. The engine itself was clean.
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When I removed the valve cover I was relieved that it was extremely clean inside:


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Super Moderator
2003 330cic, 2003 325iT
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Discussion Starter · #122 ·
When I removed the oil pan, I found this piece in the sump, which was mildly disturbing:
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I was baffled until I decided to take the timing chain cover off, whereI found the home for the little guy:

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I decided in an abundance of caution to pick up a used timing chain cover and move on. I also found more damage to the timing chain guide

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And the camshaft timing chain tensioner had a piece broken on the guide


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I decided to suck it up and replace all hains and the guides/tensioners.


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A new crankshaft seal appeared to be in order:


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Cleaned up, new seal, and ready to install:

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And in:
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E30M3 Race F10 535 R1150Rt M Coupe
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6,790 Posts
NICEEE.
Suggestion? Oil filter housing: Have a great machinist? Have the oil filter housing mating surface machined a thou or two?
You could also use a surface plate and emory cloth sheet. Would add life to time to revisit interval.
 

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Super Moderator
2003 330cic, 2003 325iT
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6,961 Posts
Discussion Starter · #124 ·
NICEEE.
Suggestion? Oil filter housing: Have a great machinist? Have the oil filter housing mating surface machined a thou or two?
You could also use a surface plate and emory cloth sheet. Would add life to time to revisit interval.
Interesting. Is it known to warp or Inadequately machined?
 

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Premium Member
'03 325iT Mystic Blau
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4,805 Posts
I work in the machine tool manufacturing industry. When we mate critical parts, where microns may impact critical alignments, we use an emory stone to make sure that both faces are flat.
 

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E30M3 Race F10 535 R1150Rt M Coupe
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FWIW I have never verified, but it goes like this with a few of my high mileage customers:
1st. gasket lasts ~80-125K miles.
2nd. gasket in another 65-80K
3rd. gasket even less.

All genuine dealer parts.
My hypothesis is that the aluminum housing slightly warps, getting out of trueness. Why not, lots of other aluminum housing do! (Ever see how bad the nylon or aluminum thermostat housings can get on a M50-S52 engine?)

Drag it back/forth a number of times on a surface plate until you see it flat again. Clean/install.
 

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Premium Member
'03 325iT Mystic Blau
Joined
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4,805 Posts
FWIW I have never verified, but it goes like this with a few of my high mileage customers:
1st. gasket lasts ~80-125K miles.
2nd. gasket in another 65-80K
3rd. gasket even less.

All genuine dealer parts.
My hypothesis is that the aluminum housing slightly warps, getting out of trueness. Why not, lots of other aluminum housing do! (Ever see how bad the nylon or aluminum thermostat housings can get on a M50-S52 engine?)

Drag it back/forth a number of times on a surface plate until you see it flat again. Clean/install.
This is right on the money. As I said, in the machine tool industry we stone mating surfaces every time that a part is removed and replaced.
 

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Super Moderator
2003 330cic, 2003 325iT
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Discussion Starter · #129 ·
This is awesome. I was thinking of using 3/8" tempered glass. Where do I get emory paper? And I presume the bed has to be larger than the surface area of the machined face?
 

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E30M3 Race F10 535 R1150Rt M Coupe
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6,790 Posts
You will need "Cloth" and NOT emery paper. In a 9"x 11" sheet. Make sure the surface you lay the glass on is very smooth and flat, glass flexes.
I think the hardest part is to hold and apply pressure evenly in long strokes, alternated with a circular motion (Hmm...) inspecting for high spots you're attacking, as well as being even across the entire surface. The sanded area will show what you're doing.

The cloth is durable and can be shaken out to clean before all the abrasive is worn. I advocate to use the whole sheet. This way your work is most effective.

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2004 325i automagic
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3,414 Posts
I think the hardest part is to hold and apply pressure evenly in long strokes, alternated with a circular motion (Hmm...)
Good advice ... :cool:
 

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E30M3 Race F10 535 R1150Rt M Coupe
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Surface plates can be crazy $$$.
I got lucky and bought one from a machine shop going out of business. $15 some 10 years ago.
What a steal.

I think he'll be just fine with the glass on a smooth surface. As long as he minds the sharp edges....
 

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Super Moderator
2003 330cic, 2003 325iT
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6,961 Posts
Discussion Starter · #135 ·

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Super Moderator
2003 330cic, 2003 325iT
Joined
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6,961 Posts
Discussion Starter · #136 ·
More progress. Cleaned up the oil pan:

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Ready to be installed:
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And we are in! I have done this three times from below on stands and doing it to a motor on a stand is positively civilized!

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And the new hard lines are in:
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203 Posts
A little side project - when the hatch opened the top edge would scratch the rear spoiler, which is obviously quite unacceptable.

I read a few posts that pointed out the source was a damper behind the dual hinge that gets squished over time and allows the hatch to over-travel.

I picked up a square of 1/8" gasket rubber from the plumbing aisle at the local Ace hardware, and cut two small pieces about 1.5" x .5" -
View attachment 906717
Side view:
View attachment 906718

Glue it in (see picture below for location):
View attachment 906719

And presto-chango - the hatch doesn't hit! Sadly, this fix will not repair the existing scratched paint :(

View attachment 906720
how much stuff do you have to remove to get to where you can insert/glue the rubber piece.
 

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Super Moderator
2003 330cic, 2003 325iT
Joined
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6,961 Posts
Discussion Starter · #139 ·
You will need "Cloth" and NOT emery paper. In a 9"x 11" sheet. Make sure the surface you lay the glass on is very smooth and flat, glass flexes.
I think the hardest part is to hold and apply pressure evenly in long strokes, alternated with a circular motion (Hmm...) inspecting for high spots you're attacking, as well as being even across the entire surface. The sanded area will show what you're doing.

The cloth is durable and can be shaken out to clean before all the abrasive is worn. I advocate to use the whole sheet. This way your work is most effective.

View attachment 928159
I picked up a piece of granite from a local stone guy. Off cut from a job.

I got emery cloth (220) from Harbor Freight.

questions:
1. Do I use any spray adhesive to keep the emery cloth from slipping?
2. Wet or dry?
 

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Premium Member
'03 325iT Mystic Blau
Joined
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4,805 Posts
Some spray adhesive like 3M 77 works well.

I used to keep a, 1-1/2" thick piece of Lexan on my desk as a sanding plate when I was making props. 77 sticks well enough to solidly hold the paper down, but allows it to peel up for replacement when it's shot.
 
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