Excessive Blowby

[akghound]

Greetings ... new to this forum. Been looking through the forum for the answer but still not sure.
Problem; Truck was ranning well until a Push rod broke. Replaced the pushrod and started truck. Engine has a definate miss on one cylinder. Number 6 is the suspect as it had the broken pushrod. There is enough crankcase pressure to blow oil up the dipstick when reved to over 1800 RPM. Exhaust has only a slight white smoke to it. Engine starts ok, idles rough, reves up, Fuel pressure is good 60#. Left bank tube has oil in it that came from the CCV.
2000 F450
Thanks .... Ken Gardner

[AFBLUE]

if you have enough pressure to blow up the dipstick, is your CCV plugged?

[d7rxr]

Either that or possible hole in piston? Had that happen with a gasser once.

[akghound]

Originally Posted by afbluesv1k

if you have enough pressure to blow up the dipstick, is your CCV plugged?

It is OK I took the tube off of the air box and checked it out. Seemed to have a lot of CC pressure coming from it as well.

Could this much blowby come from just one dead cylinder? I hope there is not a hole in the piston
We will have a scanner available in the next couple days to figure out just why this cylinder is dead.
Ken Gardner

[rivman1243]

if the injector isnt fireing then your rings are not seating allowing all your air to push past the piston

[akghound]

Scanned engine and #8 showed up in the contribution / balance test. Pulled the glowplug and blew air into the cylinder and straight through to the crankcase. Pulled the head and found a huge hole in the piston. It had melted down around the 2-oclock position. Very little damage to the cylinder wall, thank God. Piston #2 is showing signs of burning out as well. Looks like a rebuild is in store. Ouch that hurts! At lease it happened now instead of during the Fire Season when the truck can be making money. Trouble is last Fire Season is so far away that I'm broke. No money but lots of time so I'll be doing the wrenching myself, no big deal. Any inexpensive tricks I should do while the engine is out of the truck? Just replaced the Tranny and transfer case, new breaks. Before long this truck will be like new but right now it feels like Fix Or Repair Daily!!

[akghound]

#8 piston burned through.


#2 damaged



Haven't taken the right side hear off yet.

[akghound]

Pulled the right side head and at a quick glance it all looks OK. I want to add Exhaust gauges, pre-turbo. What are you guys using for the gauge? Duel needle? Where would you put the sensors, thermocouples?
Here is a picture of my #8 piston.

Thanks Ken Gardner

[akghound]

Since this is no longer urgent I started a new thread here http://www.powerstroke.org/forum/7-3...-meltdown.html I still need advise
Thank you .... Ken Gardner

[mrblonde108]

how did that happen. and a bent pushrod?? how would a stock engine get so hot???