Originally Posted By: Hethaerto
Originally Posted By: postjeeprcr
Originally Posted By: Hethaerto
Originally Posted By: DieselTech
Did you open the engine afterward?
Uh oh, you want me to provide "proof" to you, too?
No proof, other than the engine shot from 2k RPM to 3.5K RPM (and climbing) after ten minutes meaning that some serious sludge had been freed from some important places throughout the engine. At least, that's what I figured was happening.
I had to readjust the throttle to get it back down to 2K RPM, and let it run for another 20 minutes.
That is interesting the rpms went up, what kind of vehicle was this? Did you notice a difference to you, in how the vehicle ran after you put the new oil in after doing the flush?
2002 Volvo XC70. Yes, the engine felt like it had more torque, I guess. Still idled roughly, though, and ran slowly, until I installed the CerMet.
Hethaerto, have you had a look at the list of Technical Notes and Service Bulletins for your XC70? This one appears to exactly correspond to your issues (worn valves):
TNN21-21-2005-08-15 Title: Engine may have a rough idle, DTC ECM misfire codes, rough running or lack of power.
The Customer may have a complaint of a rough idle, rough running, lack of power or the MIL on.
• Read out DTC's
• Check compression and do a leak down test with the engine cold.
• Check valve clearance on the cylinders with low compression.
• Remove the cylinder head and check the condition of the valve face.
• If the valve face is worn, replace ALL the intake valves, even if some look okay.
• Use ONLY intake valves with P/N 30637059.
Further links to TNN lists here:
http://v70r.com/home/defgh1/MiscVolvo/index73.pdf
http://forums.swedespeed.com/zerothread?id=72251
FYI, removing the magnets from the filter on your Trooper (as you mentioned in another post) sounds like a disaster waiting to happen. Assuming that they were actually effective in trapping a large amount of ferrous material, their removal would suddenly release all of that into the filter and the portion that made it past the filter would then be free to scour the rest of your engine.
Cheers,
Jeff