Last month i blew my head gasket since i was pushing 680 hp with regular arp bolts and i guees i found their limits lol. I changed pistons rings and today i putted the car finally back. Im on e-85 any idea of what could be causing this little blue smoke getting out from my exhautes . Ps i did changed valves seal too. I will start the car tomorrow again and watch it preety much for like 30 min. I hope everything is good

 

Could be residual coolant still in your engine somewhere. I'm sure as soon as you saw you blew the HG you stopped driving it so it probably never burned off the coolant that bypassed through the blown HG. Tis the season for blown HG, mine was leaking last week right before it was ready to go on dyno.

 

Blue smoke on start up is completely normal. Especially with aftermarket pistons.

When the engine is cold, so are the pistons and the piston rings. Once the car starts there will be a great deal of blow-by resulting in burning some oil. Once everything is warmed up the blow-by should be VERY minimal depending on the tolerances set for ring gap.

 

Fairly normal til the engine gets up to operating temp, especially with built engines.

 

No. Blue smoke is an indication of an oil related issue. White smoke is a coolant problem.

 

der brain fart. thanks

 

I know you said you replaced the valve seals, but blue smoke at startup is a classic intake valve stem seal issue. Good luck man.

 

This--also if your running dual VS then you need to double check the seals--related threads said they pull up and need to be reseated. Aside from that--rings will need to seat-- and for the record a good build with the rt tolerances will not burn oil--burning oil is not a result of a built engine nor is it normal-- its an indication of a problem.

 

No one ever said burning oil is normal, HOWEVER:

Oil consumption is normal as a direct result of blow-by. It happens on EVERY engine varying to a degree of acceptable.

Now excessive oil consumption is a different story.

You should see some of the oil consumption rates that manufacturers deem "normal".

 

I don't know how much oil consumption Mitsubishi considers normal, but I do know Chrysler states that burning 1 quart every 1,000 miles is normal. I think that's crazy though, that's a lot.

 

Not to push the topic but the posting above mine states---Blue smoke (oil) at start up is normal.... I think not.
In my view a motor that burns oil is a POS and has problems. Defined by me as anything more than 1qrt per oil change or 5k mls. But maybe that's just me. Maybe Chrysler says its 1 qrt every 1k---sorry, that would be the reason I wouldnt own one-- I have a Nissan with over 205k and it doesn't burn oil more then what I tolerate- 1qrt every 5k. I have build and owned several cars with well over 150k that have met or currently meet that criteria.
Large ring gaps--poor break-in, bad tolerances/clearances, poor attention to detail and ragging on and beating on your motor all lead to burning oil.-- these are the issues I think of when a motor burns oil--so something other then normal--But to each his own.
I ask a simple question ---if a car was advertised as "just burns oil at start up", or only uses 1qrt every 1k would you even consider looking at it? Normal or not.

 

Hey guys thanks for your opinions. Im been watching the car really close this last days and not more smoke from the exausted, i guees it probably was some coolant or oil left in there somewhere.