I have some serious engine problems in my MG, starting with my head and working down. The short answer now is that I'm waiting both for a replacement head to replace the boat anchor(visibly cracked) on it as well as for a machine shop to bore it.
In any case, though, we hear a lot now of carbon on GDI engines, but I was always under the impression that gasoline washing over the intakes kept them relatively clean.
This cylinder head was redone about 5K miles ago. The original intake valves were reused, but were spotlessly clean and were lapped to the re-cut seats. I think there were some issues with how the work was done, but that's another topic and something I'm discussing with some MG guys. I'm doing a "post mortem" on the head, and pulled one set of valves.
I'm a bit surprised at the amount of carbon on this intake valve(on the right in the below photo) especially given 5K miles. Any thoughts on what could have caused this? I did have a fair bit of blow-by, but ran both a cleaned/refurbished factory oil-air separator and a catch can(that didn't catch a ton) so don't think I had much if any oil going into the carburetors. It's always run on 92/93 Octane gas, and usually Shell V-Power. I do Berryman's B-12 once a year or so. Every tank also gets Sta-Bil, more because I don't know if I'll run it out in a week or in 3 months.
In any case, though, we hear a lot now of carbon on GDI engines, but I was always under the impression that gasoline washing over the intakes kept them relatively clean.
This cylinder head was redone about 5K miles ago. The original intake valves were reused, but were spotlessly clean and were lapped to the re-cut seats. I think there were some issues with how the work was done, but that's another topic and something I'm discussing with some MG guys. I'm doing a "post mortem" on the head, and pulled one set of valves.
I'm a bit surprised at the amount of carbon on this intake valve(on the right in the below photo) especially given 5K miles. Any thoughts on what could have caused this? I did have a fair bit of blow-by, but ran both a cleaned/refurbished factory oil-air separator and a catch can(that didn't catch a ton) so don't think I had much if any oil going into the carburetors. It's always run on 92/93 Octane gas, and usually Shell V-Power. I do Berryman's B-12 once a year or so. Every tank also gets Sta-Bil, more because I don't know if I'll run it out in a week or in 3 months.