I have put only about 60,000 km on my Rodeo running B100. I change my oil every 5,000 km. The injector pump was rebuilt about 12 months before I bought it in 2013 - I had assumed it was likely done with Viton seals as I had recently heard from a diesel pump technician that they have been using Viton for many years since introduction of low sulphur diesel. This was one of the key deciding factors in buying the ute as I thought I would be less likely to have IP issues.
In the early days, I felt like maybe there was a slight increase in oil level 5,000 km after changing, but nothing major.
About 4,000 km into the last interval I dropped about 2L of oil out of the sump as it was reading very high on the dipstick and it looked like it was blowing oil out the crankcase breather.
When I changed the oil at 5,000 km I purposely only filled it to the first notch on the dipstick to see what would happen. 600 km later it seemed like it hadn't moved. 1,400 km later it is well over the top notch and getting to the point where I am going to have to drain some off again.
I have heard a few theories from others and wanted to see what you all thought:
Theory 1: there is a problem with an internal seal in the IP and it is leaking B100 into the engine oil at the front of the pump, into the timing cover, via the pump driveshaft.
Theory 2: the rings are shot and it is just leaking past and filling the sump. This seems less likely as it had almost no blow-by previously and has had regular oil and filter changes. It has been driven very hard though and EGTs have gotten a bit on the high side from time to time. I could do a compression test but am not enamoured with the idea of pulling injectors to test at this early stage.
Theory 3: the dipstick graduations are very sensitive and it doesn't take much additional oil to make a big step on the stick. I have made sure to check it in exactly the same place each time and wait a good 5 - 10 minutes after shutdown to read.
Next steps:
1) drain oil off and get level back down to low mark
2) run a couple of tanks of dino diesel though and see if the result is similar. I have heard that dino is more likely to vaporise and leave the sump than bio. I know diesel will not evaporate like petrol and that bio does not evaporate at all - what are your thoughts?
In the early days, I felt like maybe there was a slight increase in oil level 5,000 km after changing, but nothing major.
About 4,000 km into the last interval I dropped about 2L of oil out of the sump as it was reading very high on the dipstick and it looked like it was blowing oil out the crankcase breather.
When I changed the oil at 5,000 km I purposely only filled it to the first notch on the dipstick to see what would happen. 600 km later it seemed like it hadn't moved. 1,400 km later it is well over the top notch and getting to the point where I am going to have to drain some off again.
I have heard a few theories from others and wanted to see what you all thought:
Theory 1: there is a problem with an internal seal in the IP and it is leaking B100 into the engine oil at the front of the pump, into the timing cover, via the pump driveshaft.
Theory 2: the rings are shot and it is just leaking past and filling the sump. This seems less likely as it had almost no blow-by previously and has had regular oil and filter changes. It has been driven very hard though and EGTs have gotten a bit on the high side from time to time. I could do a compression test but am not enamoured with the idea of pulling injectors to test at this early stage.
Theory 3: the dipstick graduations are very sensitive and it doesn't take much additional oil to make a big step on the stick. I have made sure to check it in exactly the same place each time and wait a good 5 - 10 minutes after shutdown to read.
Next steps:
1) drain oil off and get level back down to low mark
2) run a couple of tanks of dino diesel though and see if the result is similar. I have heard that dino is more likely to vaporise and leave the sump than bio. I know diesel will not evaporate like petrol and that bio does not evaporate at all - what are your thoughts?
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