Excess blowby

[in2trux]

Thanks Marajin!

I can add a little background on this engine. According to the sparse records I got when the truck was purchased, the head was replaced under warranty for a crack in the head. I'm going to guess it was #3 but can't prove it. After getting set up with insite we found there was a high EGT event before we bought it that likely cracked the head.
It is possible that the damage was already done then and progressed.

Oil pressure and temperature were always solid. Hot idle was 25-28 psi, 38-40 psi running. I never saw oil temp over 225 on hard pulls. Oil pump was replaced before purchased, now I have to ask myself why? One thing is for sure, that pump is going to be shimmed to bring the pressure up!
We'll see what the rod and main bearings look like this week when they all come out.

Oil was changed every 10k miles, maybe twice at 12. There will be a bypass filter on it before it hits the road again!
I have been adding 1 gl. 80w90 to the mix, with Delo 15w40 and the engine was smoother and quieter with it.

Power Service was added regularly to the fuel but I'm going to look at changing the primary filter to Davco.

We really weren't planning on doing this this year, maybe next year since the average mileage is 55-60k/year.
Just goes to show, unless you start with a fresh engine, you never know what you're getting when you buy a used truck.

I will feel a whole lot better about the engine knowing exactly what has been done to it and the guy doing the job knows what he is doing!