New engine for my F-600 Dump Truck

[LoneCowboy]

I agree with the other guys, way too much crankcase pressure for some reason.
why is a whole nother story? valve gone? PCV valve
does on smoke on acceleration (rings) or deceleration (typically valves)?

dunno, but that would suck after only a few hundred hours.

 

[EddieWalker]

Thank you for the replies and advice. I've done some testing and looking, but only have more questions.

The engine oil isn't down very much at all. I think the loose valve covers were the cause there and now that they are tight, the oil loss isn't happening any more.

The white smoke is getting worse. On acceleration, it's very noticable.

The PVC valve is new, (I wasn't sure if I'd replaced it or not) and rattles when I shake it. The hose to the base of the carberator is clear and dry.

On the other valve cover, the vent line to the air cleaner is also clear, but the vent itself looks like it's getting allot of oil on it. I can blow through it easy enough, so there's no restriction, but there is oil on top of the valve cover where it's getting out.

There is also a very small amount of white smoke that comes out of that valve cover with the vent off.

I pulled every spark plug, and they are all evenly coated in oil. The threads are soaked and the prongs are covered in built up, baked on oil.

I've been using the Bosch two prong spark plugs and some of them look like they have been bent together to touch the center piece. I don't know why this is or if the piston is toughing them. I'm replacing them with regular spark plugs.

I can't find my vacume gauge, so I'm off to the auto parts store to buy a new one.

The plugs on the vacume outlets are coming off. The last time I looked at the engine, one was missing. I replaced the plugs, tightened the valve cover gaskets and put on a new vacume plug. The truck ran great for most of the day until it started to smoke again.

There is one small plug that is cracked down the side and a big one behind the carborator that is missing.

What would cause them to fall off? I'm buying new ones and replacing them with the hope that I just had bad vacume plugs that were old or slightly stretched out.

I did a compression test of all 8 cylinders with all of the plugs out. I have cylinder with just over 130 pounds, three cylinders at just under 150 pounds and four cylinders around 140 pounds. I didn't add a squirt of oil, I just did the test right after removing the plugs.

With all eight spark plugs universally and evenly coated in oil, it tells me that it's coming from the intake manifold. The oil is black, the water is green. There is no oil and water mixture, which is tells me that there is no cracks or gasket problems between those two fluids.

Iron Horse said that the gasket on the intake might get sucked up and cause this. Right now, that's the only thing that explains what's going on. What I'm having trouble with is how did it just happen?

I'm at a total loss at what else could be causing this, but maybe when I get my vacume gauge, I'll have a better clue.

Again, thank you for your help and if anybody has any ideas, I'd sure appreciate hearing them.

Eddie

 

[EddieWalker]

I put the new spark plugs in and replaced the vacume plugs, and it fired right up. It idles smooth and sounds really good. It also smokes. White smoke comes out of the exhaust in a steady stream.

I put the vacume gauge onto the bottom of the carburator where the PVC line connects to it and got a very solid reading of 20. The instructions said to accelerate real fast and then let go. I did this, and the readings were exactly like the instructions said it should be for normal engine. It droped to 5 and then went up to 25 before going back to 20.

Compression is good, vacume is good, timing is good and I'm dying from all the white smoke.

Eddie

 

[CinderSchnauzer]

It's been a long time, but any time I ever had white smoke it was water, usually from a blown head gasket. Don't usually get oily plugs with that.

 

[Eagleview]

If you think you have fixed the oil consumption problem by tightening the rocker covers i would take an educated guess that the white smoke problem is because you have Diesel in your petrol tank . It can happen at the service station , Diesel gets put into the wrong storage tank . Remove the fuel line at the pump and rig up a tin of (known) clean fuel and run it for a while . If the smoke clears up , drain your tank and refill . This can also happen if brake fluid is leaking at the power booster into the vacuum chamber and is then drawn into the manifold via the booster vacuum hose . (PS these two things can also cause detonation which blows the plugs off the vacuum fittings)

 

[EddieWalker]

If you think you have fixed the oil consumption problem by tightening the rocker covers i would take an educated guess that the white smoke problem is because you have Diesel in your petrol tank . It can happen at the service station , Diesel gets put into the wrong storage tank . Remove the fuel line at the pump and rig up a tin of (known) clean fuel and run it for a while . If the smoke clears up , drain your tank and refill . This can also happen if brake fluid is leaking at the power booster into the vacuum chamber and is then drawn into the manifold via the booster vacuum hose . (PS these two things can also cause detonation which blows the plugs off the vacuum fittings)

Interesting thoughts.

Would diesel in the gasoline look like motor oil on the plugs? What about brake fluid? The oil on the plugs is black and looks just like motor oil, but I couldn't say 100% that it actually is motor oil, it just looks like it.

I did pull the vacume line to the breaks master cylinder and it looked dry. No sign of any type of moisture, so I eliminated that as a source. I am low on break fluid, but don't think one has anything to do with the other.

I did get to wondering if there was a break in the fuel pump where it goes into the block and if oil could somehow mix with the fule and cause all this troube. I just can't believe that oil would function in a two barrel Holley carburator. It idles and runs very strong. There is just this white smoke that seems to be getting worse by the minute.

Again, would it run good with diesel in the fuel? I've never had this happen, but wouldn't it take allot of diesel to foul the plugs?

When I say the oil level isn't droping, I should have said it's not droping like it was with the loose valve covers. With the valve covers tight, there is still a small leak that I'm going to fix by putting on new gaskets, but I'm holding off on that until I decide what is causing the smoke.

There is oil getting into my intake manifold. This I'm sure of. How it's happening is what I don't understand. I'm not aware of, nor can I comprehend a reason for an oil passage through the manifold.

If the gasket was bad and oil was splashing into the manifold, I should have a huge vacume leak. Shouldn't I?

How is the oil getting into the manifold? This is what I think is my problem and explains why all 8 cylinders have oil on them. It's getting into the manifold and being destributed to the cylinders. 8 evenly fouled plugs with oil on them, high compression, no vacume leaks and good timing. It's driving me nuts!!!

Thanks,
Eddie

 

[JESSE1]

Have you checked your air filter? If it's plugged that could cause your plug fouling problem.

 

[EddieWalker]

Nope, haven't looked at it. Could it be that simple?

Eddie

 

[JESSE1]

If it's plugged it would cause the engine to run rich; too much fuel for the available air. You should see black smoke, don't know about the white smoke.

 

[Eagleview]

I would try running some clean petrol through it . I once bought a Ford Falcon from a mechanic . He said he had just put new rings in the engine , a few days later it started blowing smoke . I thought he had done a crook job on the re ring and i was about to tear it down and do it again . I decided to do as i advised you and hooked up a tin of clean fuel to the fuel pump . Within minutes , after the bad fuel was purged it started running clean . I went to the Ampol service station and asked if it was possible that Diesel had been dumped into the wrong tank . The guy said that is exactly what had happened and there were cars at the local mechanics with the engines out for rebuilds as they did'nt catch on to what had happened . I think it may have been in the back of my mind , years earlier i was working at a motor dealers and a chap brought a car back that was blowing smoke . He wanted a different car so they swapped him into another car . It just did'nt wash with me so i did as i said and it ran fine again . He had poured oil into the fuel tank to make it blow smoke to get out of the car and into a better one . I do'nt know if this is what is wrong with yours but it's an easy thing to check .