R5 PD BAC Combustion Interrupter and LLR at Full Capacity

Hello everyone!

I have a BMW R5 motorcycle for sale with a verifiable mileage of 160,000 km. It has an automatic transmission. No DPF.

Problem description: Intermittent misfires in cylinder 3, occurring sporadically at 790 RPM.
Idle speed control (cold) at +2.99 mg per injection on cylinder 3.
(warm at 1.xx)
All the other cylinders are within the specified range (-1 to ).

When starting the R5 engine from cold, it runs noticeably unevenly and (presumably) on only 4 cylinders. The engine is shaking.
It improves as the engine speed increases, starting around 1200 RPM, or when the engine warms up.

Given that the PD values are okay when the engine is warm, I suspect there is a defect in the cylinder. Correct?
I suspect there might be damage to the piston rings, which could expand further with increasing temperature, leading to reduced cylinder compression. Alternatively, the cylinder bore itself (the "plasma" surface) might be damaged. (Previously, engine oil meeting specification 50700 was used.)
Are there any empirical data or insights on how long such a situation typically lasts? Since the entire block is affected, a repair or replacement would not be cost-effective given the year of manufacture (2003).

The performance is otherwise satisfactory. Acceleration and top speed are good.

Thank you very much.

Hello, the wrong oil (50700 instead of 50601) has unfortunately often been a problem with these engines and has caused many engine failures.

But first, I would definitely install a new PD unit (possibly a crossmember).

Best regards, Dago.

Hello.

First, remove the cylinder head cover and check if the actuation and adjustment of the relevant PD unit are correct.

Best regards, Rainer.

Hello,

It could primarily be the PDE wiring harness... it's probably xx years old.

Does it make a "ticking" sound coming from the hood? --> Probably the NW (Northwest) or the hydraulic system is defective.

BAC in a Touareg? But it's actually Euro 4 with a DPF, so then it's 507.00(1).
BAC is not allowed in the T5 area - other owners.

Generally, if the engine is being pushed hard, it can sometimes cause a hole to burn in the pistons – especially if it's been chipped and tuned – which is often the case when you're driving on the Autobahn. "If it runs better when it's warm, even at idle, hmm, then things get interesting."

How does he start? Have you ever measured the fuel pressure?

"Cold being bad / warm being normal" doesn't really fit with the hole in the piston, in my opinion.

Take a look at the Hydros - I think I have something in mind regarding them...

SG
Manfred.

Lower the hood - Inspect the NW Hydros - Measure compression.

Sure, here's the translation:

"Additional:"

Have you ever done a blow-by test?
The lid should not fly off when the engine is idling.