Good move. It will keep your pressure up and it has great additives for the engine. I have three engines and the one that I used regular oil on looks like it is tobacco stained inside; the other two are CLEAN from using Rotella. my only hesitation on rotella would be if I lived where it gets very cold and it was then very cold. It may stop or slow leaks.

I hope it isn't the head gasket. If it is, it is clearly a small leak and that would just mean that you need to plan on fixing it someday and, most importantly, DO NOT let the coolant level get low (because then there is room for steam, and that's what really causes them to blow out). But if it is, you can replace it on a weekend in your driveway with basic tools--I've done it many times.

 

Hello all,

I purchased a disco 2 several months ago, and have been tackling trouble code after trouble code. Relevant work I have completed is listed below.

I am currently getting 2 codes p0455 and the misfire on 4 code. I have rough idle after sitting overnight and overheating situation. I did not have either of these codes until I did my valley pan gasket. Nor did I have the rough idle situation. I ordered the purge valve, but wondering if this misfire may mean something other than the terrifying cracked block.😡😱😥😓 Literally all my hard work....

Champion Spark plugs

Denso Wires

Valve cover gaskets (deep clean covers)

Upper intake manifold gasket

Throttle body heater plate and gasket

Upstream driver’s and passenger o2 sensor

Rotella T3 15w40 and filter

Coolant flush

Power wash engine compartment

Stainless steel bleeder+screw 209737

Valley pan gasket, upper intake manifold gasket, yellow power steering pump gasket, fuel injector o rings

 

If it ran fine before all your work I would think it's related to the work done, not a cracked block. I think there are a number of things done that could cause misfiring, spark plugs, wires, manifold gasket, upper O2 sensor...could the power wash have knocked some wiring out?

 

Thank you for the encouraging reply. I will double check my work then. This thread had me spinning.

 

@Abigail Galloway the p0455 is a evaporative system leak.

You have a one of these

1. Purge valve
2. Vacuum line disconnected
3. Vacuum line damaged

Start by checking every vacuum line as well all the hoses connected to the throttle body. My bet is you will find some loose or disconnected lines.

 

thank you! The part came in the mail yesterday and that code disappeared this AM when I installed it. I pulled the plug on cylinder 4. It has around 2k miles on it. Pics attached

 

That's how my plug looked when I had coolant leaking into the cylinder from behind the liner. Caused a lot of misfires. I could clean the plug and drive for 20 or so miles and the misfires would start again.

If you can remove the plug when the engine is still hot and that black crud is damp that is a clue. You can also inspect with a cheap USB boroscope by looking into the spark plug hole for signs of bubbles around the seam between the block and the head. You also have to do that while the block is warm and coolant is still under pressure.

 

Try pulling a couple of others to compare ideally from the other side