Site Navigation

Your Account

Choose Language

High silicon where to look

Series 60 d dec4. My silicon usually runs about 4-8. My last two oil samples have been around 25. I've checked the air filter, air box, and all the connections between the air box and turbo. What else should I check? Could a leaking charge air cooler or the intake manifold gasket be the problem. Any help on how to test or troubleshoot this problem would be greatly appreciated.

Answer this question I have this problem too

Is this a good question?

Score 0
Add a comment

1 Answer

Most Helpful Answer

checking cac and intake is a good place to start. i have found any time the valve cover comes off silicon goes up. Recent overhead?

Was this answer helpful?

Score 1


First off.. Great name. I have not done a recent overhead. The last 3 samples,every 10,000 miles, have all come back with silicon over 25. Do you know how to test the air intake manifold? I tested the charge air cooler and it has no leaks. Thanks for the help.


Add a comment

Add your answer

Rick will be eternally grateful.
View Statistics:

Past 24 Hours: 0

Past 7 Days: 0

Past 30 Days: 0

All Time: 35