im scared and need some tipe of answer
- Thread starter 3SGTEWRC
- Start date
gearhead313
New member
white deposits can sometimes mean some coolant going through the exhaust.....not good
If it was coolant the ECU would throw a code. Getting either coolant or any kind of silicate on an O2 sensor will ruin it instantly. If you want to test that, get an old O2 sensor, clamp it in a vice with a voltmeter attatched, then heat it up with a blow torch and test it (normal readings are 0.1V - 0.8V), then spray it with coolant/or coolant smoke, it will either put way WAY lower voltages (0.07 or lower) or will stop completely. This is one reason you never want to use silicate adhesives on your manifold or head gasket, even the slightest ammount will cost you an O2 sensor if it gets in the intake exhaust tract 
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alltracman78
Active member
you are proably good. Depending on mileage, won't hurt to replace. You can get at dealership (best) or go to auto store, get 4 wire, and wire into yours.
gearhead313
New member
MrWOT":3aurbdud said:If it was coolant the ECU would throw a code. Getting either coolant or any kind of silicate on an O2 sensor will ruin it instantly. If you want to test that, get an old O2 sensor, clamp it in a vice with a voltmeter attatched, then heat it up with a blow torch and test it (normal readings are 0.1V - 0.8V), then spray it with coolant/or coolant smoke, it will either put way WAY lower voltages (0.07 or lower) or will stop completely. This is one reason you never want to use silicate adhesives on your manifold or head gasket, even the slightest ammount will cost you an O2 sensor if it gets in the intake exhaust tract
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i'd agree if it started dumping coolant through the motor, but i've had ones where water would just start seeping out from somewhere, not causing total meltdown, but enough to lean it out and cause this condition.
.....or, boost makes heat. could be just from the lil bugger getting hot from high egt's.