Ford F450 7.3 Powerstroke Bad Cylinder

This is how an engine with bad 8th cylinder sounds. After the short video, I did a compression test. All cylinders showed near equal compression of ~400-450 PSI except #8 which showed 110PSI.

Category:

Science & Technology

Tags:

• Ford F450
• Powerstroke
• 7.3
• compression test

[welder372]

What was the problem? Mines doing the same smoke & miss. Codes come up #8 miss fire.

[TheBigMi6]

@welder372

I never found out. If you get the same issues, I would suggest a direct drop in. Don't waste your money and time on mechanics to diagnose unless you do it yourself.

[Demian1970]

I found out what was causing the bad compression in my engine on cylinder 8.

I pulled the head off and found that the piston crown was hitting the top of the cylinder wall and had worn a large divot halfway around the entire cylinder bore.

Removed the engine and had #8 sleeved and all holes punched out .20 over.

[mechanicsedge]

si tienes un problema en el motor 7.3 en cuanto a sobrecalentamiento se refiere, siempre lo que se daña son las mangas de los inyectores, o conocido como injector sleeve.

[jorge26230]

tengo el un problema enpeso igual que el tuyo y a hora paso aceite para el agua y a los dia recalento porfabor si me puedes ayudar dame tu opiniom graciass

[steveandant]

its a ford thing

[Demian1970]

Mine is doing the same, even the same cylinder. I brought it to an independent Ford shop and they did a compression test to confirm as I don't have a diesel compression tester.

I'll be pulling the head off myself to determine the cause and possible repair.

They quoted me $11,000 to install a reman. engine.

[dirtracer81]

@mikefrombg Gas motors we have done. My racecar has been threw a few..Hes done a few tractors and they are still running its the electrical stuff that gets me. If you rev it up after about 2 grand it quits smoking. Doesnt smell ike its burning any oil and no white in the oil if it was a head or gasket. Holds good oil psi. He put a new injector harness on it and it did help it some. I told him to check the injector orings and he didnt and he would send them to check them.

[mikefrombg]

@dirtracer81

very complicated engine. it could be 100ts reasons. it may be injectors, electrical problem, oil pump, fuel system... but if you get to the point where it's a cylinder (by compression test and leak down test).. for these engines is always wiser to do a new reman dropin.. unless you are mechanic and you take the project as a hobby. its alot of labor and once it has gone bad it will be very likely to go bad again.

[dirtracer81]

Got a question...my dads is doing about the same deal...its only got 130ish on it a but it starts good and sounds decent just blowing white smoke and dont run to great.