Top Overhaul M43 E46

[machismo]

Dear BMW Master,Is it normal to do TOP OVERHAUL at 130km M43 E46 engine?.. Reasons being:1. When check in computer, the firing not so got..2. No problem at coil3. Spark plug seems to have some engine oil..4. Compression abit low..have u guys come across this situation before.. Just helping my friend here..

 

[QD250]

bro,

get a second opinion from another place....

 

[jarance]

Dear BMW Master,

Is it normal to do TOP OVERHAUL at 130km M43 E46 engine?..

Reasons being:

1. When check in computer, the firing not so got..
2. No problem at coil
3. Spark plug seems to have some engine oil..
4. Compression abit low..

have u guys come across this situation before.. Just helping my friend here..

130,000 KM is a bit low for top overhaul unless the car have experience some overheating problem.

 

[machismo]

130,000 KM is a bit low for top overhaul unless the car have experience some overheating problem.

No overheating.. but the mechanic said.. need to change the gasket.. as the compression bit low..and will put a new valve seal as well..

When we do the top overhaul.. is it will affect the car performance?

 

[jarance]

No overheating.. but the mechanic said.. need to change the gasket.. as the compression bit low..and will put a new valve seal as well..

When we do the top overhaul.. is it will affect the car performance?

double posting

 

[jarance]

No overheating.. but the mechanic said.. need to change the gasket.. as the compression bit low..and will put a new valve seal as well..

When we do the top overhaul.. is it will affect the car performance?

Worn out piston ring is one of the cause of low compression. Low compression happen when there is a leak when the piston is moving up. the leak can be due to worn out piston rings, improper sitting of the valves seat, worn out valve/seats, worn out or incorrect setting of the hydraulic lifter/tappet or blown gasket.

Yes, performance will be "restored" if the worn out part are replaced but it will not be 100%.