Monday was a dyno day. After a little tuning to the spark & fuel maps we produced 307 hp and 368 Nm, with little under 1.6 bar pressure. We had some spare time after this so also tried to adjust spark maps for the cruising areas, but it wasn't necessary, adding timing to any point of the map didn't seem to produce any more torque, so the timing tables were left like that.



Didn't go as planned tho, Sierra was fine after, but friend's GTI Peugeot suffered a headgasket failure (it wasn't dyno'd, he just came along). It appears that some of the head bolts had gone loose (!) and this caused the gasket to fail.

That's not all tho. Next day (today) I gave my friend a lift, he had requested a ride along in the Sierra. Did few long pulls on the freeway and after that drove home. Checked under the bonnet and noticed that some water has been spraying out of the coolant tank! Yes, it appears that both of us suffered a headgasket failure during two consecutive days...

Car seems to run fine when driving carefully, but after those pulls the engine had boiled. When the engine is running it seems to push some foamy slimy gunk to the reservoir. I can't imagine any other than a headgasket failure that could cause these symptoms, so it seems that I have to take the head out.

Kinda ironic really, it was just the day before I had said to my friend that I'm feeling like I want to also drive my other Sierra after a little break, because I'm missing listening the 2xDCOE goodness. The next day fate gave me a reason for that.