bron32

Thanks for all the replies.

The pump is a ambac. There was a air line from the pump over to the puffer. I plugged it at the at the pump and on the top of the puffer.

This truck only smoked, before, when you poured the the coal to it......now it smokes all the time rolling down the road. It was working fine

and everything that I have mentioned that I have tried is after this.

The muffler rotted out so I replaced it with a straight pipe.

The hood rubbed a hole in the air to air exchanger, 1st I j-b welded it but broke off.....so I thought it might have got sucked

into the turbo.....thats why I checked the turbo.....turns nice, got a piece of hose and gasket glue over the hole now.

The diesel injection shop says it sounds like lack of air getting to the engine.....thus the reason for black smoke, so if the intake gasket

was blown would this cause this problem ??

The maniflold pressure goes up to 18 #s if I hammer on the throttle.

Would a collapsed fuel line cause for a drop in fuel pressure ??

Thanks in advance for any ideas

Byron

Hello Guys

I have a 1980 superliner with a em9-400 v8 engine. This engine has started to smoke black when I am rolling down the road. It idles nice with no smoke ! Last year we rebuilt the injectors and injection pump.

I have taken the puff eliminator off......checked the air cleaner.......removed the hose in front of the turbo, which turns easy......checked the air to air.......and checked the suction pipe to the air cleaner.

The fuel pressure gage drops from 40 psi down to 18 #s then comes back up.......I do have one leaky injector fitting that I tried to tighten, but is still seeps a little.

The manifold pressure gage comes up when more power is required.

Any suggestions would be apprecitated.

Thanks

Byron

The valves on number 8 are noisey. Like not ticking but louder than the other 3 heads. I ran this engine for 9 hours

then reset the valves.Still seems to loud for me. Is this normal when you have new piston and liner.

Any suggestions.

Thanks

The engine must have got hot(not on us)and cracked the valve seat. (NOPE its was a fairly comon thing ) Just happens!

and usually the same way every time shut the engine off everything is fine ,Start the engine up Bang Bang Bang!

anyway .As Glenn pointed out ,you do have 3 more heads to possibly do, But if you need a good runner we have a few!

We just tore down a v8 got lots of parts Might even scare up a piston ,Phone Gary At Nanaimo Mack ( Vancouver Island)

1 250 758 0185 phone tommoro Gary is not here Fridays!

He'll hook ya up ! Tell em Fred sent ya!

Thanks

I found a place the rebuilds them in Edmonton

I will keep the number in case I need more.

Cheers

Byron

Hello Gang.

We got the big Mack running. New liner, piston and rod bearing and rebuilt head. It took about 12 hours to get it

going. It was about 3k for the parts and another 400 bucks to get the injectors cleaned. We are going to set the valves after I put a few hours on it.

Does anyone know the sequence for setting the valves.....that is if one cylinder is on the intake valve could you set the exhaust valve on the other. This would save time turning the engine over.

Any advice would be greatly appreciated.

Thanks Byron

Hello all

I went to the valve repair shop. They figured they could repair the head. After looking at it and magna fluxing it he found a crack between the two valves. The enginge must have got hot(not on us)and cracked the valve seat. Or the injection tube leaked and caused it.

Does anyone have a used head out there ?

The truck model number is: RWS721LST

serial number is: 1M1V121Y8BH054234

engine number is: EM9-400

It is a 1980 SuperLiner.

Can't seem to find any in Saskatchewan. We live north of where Montana and North Dakota meet.

Its too good of a old truck just to park.

Cheers

Byron Skjerdal

Hello.

The combine had just filled the semi trailer. I started the truck and it sounded different. We idled the truck home,which was about 1/2 mile to get it unloaded. I never reved it over 700 rpm. In hind sight I should have just shut it down, but the damage may have already been done. The thought of docking a fully loaded grain trailer in a soft field isn't great either.

The turbo turns over good with no signs of damage. I did empty the shop vac out and then sucked on the exhaust side of the turbo. I did recover a small chunk of valve seat, about a 1/4 of a inch.

Thanks for all the advice.

Will keep u guys posted as we go forward.

Cheers

Byron

OUCH- what does cylinder look like?

Ya the liner is also scored. Hopefully we can find some good used parts.

Hello all.

We pulled the pan off and didn't see much problem. So took the head off and found lots of damage. Looks like the valve seat let go.

You leave the intake in place.

Remove the air plumbing from the turbo inlet get it out of your way,Remove the cross over pipe that joins the to inlet manifolds together, remove the 6 intake bolts and the exhast manifold bolts and remove the rear section of the exhast from the head you are working on only . remove or pull back the two water rail bolts from the back head(under the intake) remove the valve cover and rocker gear ,woop the head bolts out and the head will pop off!Less than 2 hours you'll have it off.Once there you'll likly find bits and peices inbeded in the pistion thats valve seat, these peices can travel into the turbo so inspect the exhast wheel and stuff closely and if the wheel looks OK back blow the exhast tube on that side!You got the pan off so remove the piston if the liner is not damaged buy or get a used pistion

inspect the wrist bushing fo pits or cracking if ok reuse find a good runner head and your back in business!

Thanks for the info. I will keep u updated when I get it apart.

Hello All.

We took the pan off and the bearing on number 8 looked good. There is a little play on the wrist pin but it hard

to tell when laying under there.

My next question is how much of the intake manifold is to be removed to get the head off ? Is it like a chevy 350 where everything has to be taken off to get at the head. Or can I take the 4 bolts that the intake bolts to the head and then slide the head down and away from it ?

Thanks in advance for your replies.

Byron

Hello.

We have a 1980 superliner mack with a e9 v-8 engine. It developed a knock in the engine, with oil or diesel fuel running out the exhaust manifold. We took the injector line of to number 8 cylinder and it smoothened right out. Thinking it was a bad injector, we numbered and took them all out and down to the injection shop. They say their is nothing wrong with it and it appears to be a new one.

Does anyone have any suggestions. We are going to put the injectors back in, after they get cleaned up and see. The valve springs don't appear to be broken.

Should we take the pan off or take the head off.

Any suggestions would be appreciated.

Thanks

Byron