in my early diesel days I thought it would be a good idea to use a spray type cleaner, similar to throttle body cleaner to do my turbo. I took the hoses off and sprayed till it looked new, then blew it out with compressed air and left the hoses off all day to allow any leftovers to evaporate. In the evening, I put it all together and went to start the car. when the glowplugs lit, there was a huge bang under the hood, like a cannon! I figured it was the vapours lighting off. I waited a minute and tried again. It happened again, but I just held it then cranked and it fired up. Probably a good way to bend compressor fins. Didn't matter though. I had also tried advancing the cam timing a touch that day, and ended up bending all my valves. :roll:
That sucks man. All your exhaust valves from too much exhaust mani pressure or all your valves period?
oh, no. two seperate incidents. Fiddling, or, over-fiddling the cam timing euchred the valves. the chemical solvent's vapours went off like a cannon when the glowplugs lit.
On jet engines, a bad compressor stall can actually bend the compressor blades forward like an aspiring Mary Poppins-wannabe's umbrella. :lol: So i had pictured that turbo's compressor blades looking a little different after such an impressive volley of flatulence. Not that it mattered much with a gaggle of exhaust valves doing a sodium-cooled version of yoga!
Mines a bit like that, are you sure the gunk isn't coming from the rocker cover mounted PCV (positive crankcase ventilation) valve?
I was going to suggest to clean it with brake or carb cleaner, until I read dr diesels reply :oops: