How long should you run with an engine flush
before draining the stuff out of an engine?
The messy sludge I found in the valvetrain when replacing the valve cover gaskets a few weeks ago was pretty shocking. I've taken some pics and will try to put them up here for you to see soon - anyone easily scared speak up now! :p
What do engine flush products actually contain anyway? Do you drain all existing oil and fill up with the engine flush or what? Any suggestions are very welcome.
Cheers,
Mas
Need to tell us more- Use caution!
What brand of flush are you using? Apparently from some reports, they can be very harsh solvents and should only be run/idled for only a few minutes then change oil and filter. I would ask around at BMW dealers and independent shops regarding their recomendations
Here in the US there is a product call Auto-RX (do a google search) that is a metal cleaner intended to gently clean your engine. Basically it is a 3,500 mile two step cleaning/rinse product. Change oil (any oil) and filter, put in Auto-RX and drive about 1,500 miles. then change oil and filter (no synthetic this time) and drive 2,000 more miles to "rinse" the remaining contaminants out. Then change oil (oil of your choice) and filter and you are done. However, do this process twice if you have over 100,000 miles. Some people claim it is "snake oil" others say it works very well.
I am currently 500 miles in the first phase. No problems car seems to run great.
Good luck