Accert 550 egt's soaring

Need to change pistons and liners also as the acret is a lower compresion motor than a 6 nz i belive. Not posative though.

 

actullay its higher. 18:1 i believe. you dont HAVE to change pistons to convert, unless goin completely to 6nz or just going to overhaul it anyway. superhauler is the man that can tell ya for sure.

 

i wouldnt change the pistons unless they are giving you alot of blowby. the acert pistons are a higher compresion than a 6nz. i had to take the head off so i went ahead and changed the pistons. it runs as good as when it was an acert and you dont get that annoying mist coming from the blowby tube. a whole lot of less parts to go bad also. mileage about 3 to 4 tenth per mile improvment.

 

Mine had that annoying stumble on cool mornings. And it had nothing to do with the IVAs.








It was a blown headgasket.

 

is it blowby or oil mist from the vva's?

 

That's an interesting thought. Mine can stumble and run rough in the cold weather also. Half the winter infact. Are you saying the VVA's can cause this ? Not just when cold in the morning, but all the time during cold weather ?
I have noticed the hotter I can get things in the winter the better, but wasn't sure what specifically the temperature was affecting ?

 

yep! If you dont warm it up to operating temp, it's probably why.