Just bought motor with 47k miles and just noticed that there is a smell of gas in oil.Is it a major problem?

 

was it sitting on its side or anything while stored?

 

no it was and is sitting straight.i drove the car with the motor in it before i bought it and it felt ok but it was hooked up to an auto tranny then and was in an integra(heavy).

 

Was running rich?

 

dont know if it was running rich or not because it just sitting in the car for months.i only drove it around the parking lot but it ran pretty smooth,no backfiring.

 

check or replace the o2 sensor. If the o2 sensor does not send the ecu into closed loop the engine will run rich all the time. Causing excessive blowby which equates to more gas in the crankcase oil. So i would replace that o2 sensor before ur oil gets diluted enough to cause some decent damage. AKA spun bearing???

 

Oil smelling like gas could be a couple things.. Leaking rings, bad pcv & old engine oil.

 

well its a late 90s motor but it has low miles on it.i think ill try changing the o2 sensor and see that works but i have to put the motor in first lol.thanks for all ur help so far.

 

I had the same issue on a '99 civic. I replaced the wires, plugs, cap/rotor and the smell went away. The O2 sensor is more expensive.