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Forum: E39 (1997 - 2003) 07-12-2020, 09:36 AM
Replies: 9
Views: 837
Posted By djbecker
The filter housing will *mostly* drain when the...

The filter housing will *mostly* drain when the cap is removed, but a pool of oil should remain at the bottom of the housing. If that small pool drains the check valve in the oil filter housing has...
Forum: E39 (1997 - 2003) 07-06-2020, 11:57 AM
Replies: 47
Views: 61,223
Posted By djbecker
Normally I strongly recommend against...

Normally I strongly recommend against fake-a-gasket silicone sealant used with o-rings. It defeats the design of an o-ring seal, which is to deform in response to pressure in a way that makes a...
Forum: E39 (1997 - 2003) 07-05-2020, 11:19 AM
Replies: 15
Views: 606
Posted By djbecker
People call them 'over-engineered' for good...

People call them 'over-engineered' for good reason. Better cooling increases the maximum power output when new, but the design is a debris trap. So pretty quickly the better cooling changes to an...
Forum: E39 (1997 - 2003) 07-05-2020, 11:00 AM
Replies: 47
Views: 61,223
Posted By djbecker
There will be corrosion in the dead space between...

There will be corrosion in the dead space between the two o-rings.
I've found the best tool for polishing that area is a Dremel wire wheel.

Don't be too concerned with slightly increasing the...
Forum: E39 (1997 - 2003) 06-19-2020, 09:47 PM
Replies: 8
Views: 377
Posted By djbecker
Your original problem is likely that the level...

Your original problem is likely that the level sensor is not plugged in.

The level sensor installs into the bottom of the tank, but not into the fluid. You can twist and remove the sensor without...
Forum: E39 (1997 - 2003) 06-17-2020, 09:51 AM
Replies: 8
Views: 377
Posted By djbecker
When you say you "filled" the system, do you mean...

When you say you "filled" the system, do you mean to the proper level (red indicator stick slightly under the lip), or do you mean filled to the top?
Forum: E39 (1997 - 2003) 06-12-2020, 09:46 AM
Replies: 14
Views: 477
Posted By djbecker
I used to run my e30 and Z3 without pad sensors. ...

I used to run my e30 and Z3 without pad sensors. But I swapped the brake pads a few times a year for HPDE and winter/summer use, and not all pads had usable sensor slots. Now that I only inspect...
Forum: E39 (1997 - 2003) 06-11-2020, 04:45 PM
Replies: 14
Views: 477
Posted By djbecker
BMW recommends not greasing the guide pins. The...

BMW recommends not greasing the guide pins.
The braking system will work correctly with non-greased pins when everything is in good order.

Pads retract from the rotor surface from a combination...
Forum: E39 (1997 - 2003) 06-02-2020, 03:06 PM
Replies: 25
Views: 783
Posted By djbecker
Thanks for answering the question -- it really...

Thanks for answering the question -- it really does help diagnose.

The standard pressure cap is 2.0 bar. That's relatively high. The design intent is that the coolant never comes close to that...
Forum: E39 (1997 - 2003) 06-02-2020, 02:59 PM
Replies: 25
Views: 783
Posted By djbecker
Thanks for answering the question -- it really...

Thanks for answering the question -- it really does help diagnose.

The standard pressure cap is 2.0 bar. That's relatively high. The design intent is that the coolant never comes close to that...
Forum: E39 (1997 - 2003) 06-02-2020, 01:55 PM
Replies: 25
Views: 783
Posted By djbecker
The cooling system will purge itself of air...

The cooling system will purge itself of air pockets over time, not add to them. If you repeatedly need to bleed air or add coolant, you have a leak.

How long have you owned the car? If you just...
Forum: E39 (1997 - 2003) 05-27-2020, 08:30 PM
Replies: 17
Views: 667
Posted By djbecker
That engine might be late enough to have T-70...

That engine might be late enough to have T-70 plugs, one sealing the pressure relief assembly and the other factory machining access. Earlier engines had the Welch plug.

There isn't much point in...
Forum: E39 (1997 - 2003) 05-25-2020, 08:41 AM
Replies: 14
Views: 424
Posted By djbecker
I once had a rough time diagnosing a cracked fuse...

I once had a rough time diagnosing a cracked fuse for the fuel pump circuit. The connector at the fuel pump measured +12V when disconnected, and the fuel pump ran when powered separately, but the...
Forum: E39 (1997 - 2003) 05-23-2020, 06:32 PM
Replies: 2
Views: 321
Posted By djbecker
That's gotta be a parts car. I'm not sure...

That's gotta be a parts car.

I'm not sure how the rear quarter panel gets bent like that without shattering the glass, but there is some serious damage to the unibody.
Forum: E39 (1997 - 2003) 05-12-2020, 09:22 PM
Replies: 23
Views: 589
Posted By djbecker
If you have an over-heat, you'll probably need...

If you have an over-heat, you'll probably need inserts on at least some of the block threads. If you are doing one, you'll want to do all. You'll need to inspect the head for flatness and cracks,...
Forum: E39 (1997 - 2003) 05-12-2020, 03:32 PM
Replies: 23
Views: 589
Posted By djbecker
Do a leak-down test to see where it's leaking. ...

Do a leak-down test to see where it's leaking. If it's a valve being jammed open with carbon there is a chance that it could be cleared. A chipped valve isn't that expensive to replace. A bad...
Forum: E39 (1997 - 2003) 05-12-2020, 03:28 PM
Replies: 7
Views: 419
Posted By djbecker
Just a reminder that the positive battery cable...

Just a reminder that the positive battery cable run exits the unibody roughly under the driver's (LHD) dead pedal. There is a through-panel stud covered in red rubber, with a cable going from the...
Forum: E39 (1997 - 2003) 05-05-2020, 11:07 PM
Replies: 10
Views: 586
Posted By djbecker
The e39 isn't especially easy to drive away. ...

The e39 isn't especially easy to drive away. Each key has a unique encrypted transponder. You need close physical access to access the transponder, and even then it's effectively impossible to...
Forum: E39 (1997 - 2003) 05-05-2020, 10:58 PM
Replies: 2
Views: 297
Posted By djbecker
I'm not sure what you are hoping to reset by...

I'm not sure what you are hoping to reset by holding the gas pedal down. I doubt it's going to do much.

My first guess is that a fuse has burnt out. Perhaps the fuse for the transmission...
Forum: E39 (1997 - 2003) 04-29-2020, 10:22 AM
Replies: 8
Views: 291
Posted By djbecker
Add some more information. A failing...

Add some more information.

A failing ignition switch is common, and it causes unexpected symptoms. A new part isn't especially expensive, and not that difficult to install.

A failing DME is...
Forum: E39 (1997 - 2003) 04-23-2020, 06:34 AM
Replies: 7
Views: 450
Posted By djbecker
Alternator warning lights used to be a simple...

Alternator warning lights used to be a simple connection to the internal supply of the regulator. If the regulator wasn't generating power, the power would come through the warning light. The...
Forum: E39 (1997 - 2003) 04-21-2020, 02:34 PM
Replies: 27
Views: 746
Posted By djbecker
You have a vacuum leak. It's probably a split in...

You have a vacuum leak. It's probably a split in one of the intake boots. That's easy enough to fix. That might correct most of the OBD2 errors.

Does anything at all work on the cluster? If...
Forum: E39 (1997 - 2003) 04-18-2020, 11:26 PM
Replies: 28
Views: 3,804
Posted By djbecker
Post a picture of your failed circuit board --...

Post a picture of your failed circuit board -- one that shows the part numbers.
Forum: E39 (1997 - 2003) 04-18-2020, 11:20 PM
Replies: 13
Views: 6,177
Posted By djbecker
Please start a new thread rather than reviving an...

Please start a new thread rather than reviving an ancient thread. Include a link to relevant threads.

Did you also drive through a deep puddle to trigger your problem?
If so, it's most likely...
Forum: E39 (1997 - 2003) 04-17-2020, 06:42 AM
Replies: 28
Views: 3,804
Posted By djbecker
The key point is that in normal operation the...

The key point is that in normal operation the polarity protection MOSFET is turned on. Unlike a bipolar transistor, a MOSFET remains switched on with reverse current flow. It's not relying on the...
Showing results 1 to 25 of 583

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