08-11-2010 02:40 PM
There's no way coolant and fuel can mix if the seals on the injectors are bad, the coolant/fuel seals are on the outside of the sleeves aganist the head.
I don't see how a change of injectorseals can fix a coolant/fuel mix problem, perhaps something moved just a tiny bit when the injectors was pulled/installed to make the leak seal.
12-03-2011 01:44 PM
You boaties seem to have a similar problem to the school bus drivers.... Diesel in the coolant. In my immediate area there are 3-4 of the 3126B engines that appear to have the same problem. Our problem is perhaps a bit more urgent than yours, as we have kiddies sitting inside the bus while the diesel rots the heater hoses and leaks out pinholes. The fumes from the diesel fuel/antifreeze mix becomes very strong, to the point of choking the kiddies and the bus driver which forces it into an out-of-service condition. In summer/warmer days you simply shut off the water supply to the heaters and open the windows. But now that its cold, heat comes on, the windows go up and the stink gets bad quick.
The answers that are supplied here have saved me from a really lousy Christmas, as I was just short of panic and about to buy a bus to run my route with... Anywhere from $10k for really used to $120k new.
My bus will be at the CAT dealer as soon as I can get it there Monday morning. I'll let you know the results.
12-03-2011 01:59 PM
Thank you, it turns out it was not the injectors but the oil coolers. Seemed odd both failed at same time. I ordered new coolers instead of rebuilt (close to same price) and of course the Cat mechanic installed rebuilt coolers but the oil is no longer in the coolant. Thank you