BlackBrick

1997 850 I keep getting CELs P0130 and P0135 for the O2 sensors. I've replaced both the front and rear ones, but still get the CELs. What else could it be?

Thanks, I guess that makes sense. The original OEM Radiator (1997) started leaking in 2011. The Do88 should never leak. But I guess 14 years is pretty good, i may not even have the car by then. No racing. I replaced heater core a few years ago, several years AFTER I had added bar's leaks. So the newish heater core should be good. Thanks for the feedback.

My 97 850 GLT with 200,000 miles doesn't seem to be able to run under 201F. It consistently creeps up to about 219F, then the fan turns on (I assume low speed...i checked relay and both high and low speed work), The fan quickly brings it down to about 204F and then turns off. At 204F, I then tried cruising downhill with only air flow, and the radiator could only get the temp down to 201F. (ambient temp was 65F) I would think cruising with no load on the engine, the car would come down to 180-185F (My thermostat is 180F, and I put in a new one just to be sure. ) I'm thinking either my radiator is clogged, the front fins are clogged with debris, or with an intercooler and A/C condenser in front of radiator natural air flow just doesn't do much on our cars? I installed a Nissens radiator about 8 years ago, and within a few years it started leaking at the seams. I stupidly put in a bottle of Bars Leaks to fix it. I'm thinking of biting the bullet and install a do88 aluminum radiator, but if the radiator isn't the problem, and my Nissen's isn't leaking right now, then is it a waste of $450? Could the intercooler be clogged, which is not allowing outside air to cool the radiator? i DO need to do a timing belt service soon, and am still running the original 1997 water pump. But I thought water pumps on these cars went out in the bearings and started leaking, not losing their ability to move water? Thanks for any advice, Greg