AZB755V8

There are a few threads now about fuel issues. I am getting older and the memory is not as good as it once was. Anyway I have a few hobby trucks and only use one fuel tank and drained the other side. So the draw is on the passanger side on one truck the drivers side on the others. I put 20 gallons of fuel in the wrong side and ran out of fuel about 10 miles down the road, I know dumb ass move... I was taking it to a show and it just shuts down. Opened the crossover valves and got some fuel in the right tank primed it up and got fuel though the secondary filter. It took a bit of Ether to get it to start. Started down the road again and in about 2 miles ran out of fuel again. Fuel in primary but not in secondary filter. The primer was not getting fuel and had a vacuum in the line. Left it sit for 10 minutes and it would pump fuel. I filled a new primary filter and put it on. Got it running again with a bunch of Ether. Ran 3 miles and out of fuel again. Vacuum in the primary fuel line again and secondary filter empty. Loosened the fuel line to get the vacuum out started priming it and got fuel though the secondary again. Turned around and headed for home. On the way stopped every 2 miles and pumped the hand primer 10-12 times. It stayed running and did not seem to have air in the lines after that. The question is: If there is even a little air in any of the lines will an airlock develop? I don't think it is the lift pump as the vacuum is in the line before that pump so it is pulling the vacuum. I did blow through all the lines, not collapsed, they were all new 3 years ago. Does fuel plug up a filter from sitting, even in a garage temp between 50-100 degrees, it's in AZ. Running out of fuel don't help and started the problem...

Might be showing my age or that I haven't been to the scrapyard in several years. Last time was with the boy's and showing them that metal junk was worth money when we emptied the piles for the last time. At that time ferrous metal was $200 a ton. Phoenix prices seemed high but my brother in Ohio made Bank scraping a few trucks back then. One was R719-1003, third one built, with a ENDT864 twin turbo, that guys are looking for now, still have the turbos. Wish I had some of that stuff, now it's worth more than scrap price. I think the high was about ten years ago when China was buying scrap ships and filling them with scrap and leaving them float until needed. The point was that this truck was a Great deal for someone that wanted it. Even for just a low milage 865 V8 engine or auto trans...

Glad that was all it was. Yes, they do sound good, like a small block version of an E9. Mine has just a little lope at idle if it is not in 4 or 5th gear and the splitter in neutral, just a little drag and it smooths right out. I like the slow lope only about 50 rpm's difference but noticeable. I didn't have leaking injectors but I have had to weld a few leaking injector lines, no new ones from Mack anymore. They make a mess in a hurry only way I knew was it was loping a little more than nornal... and the big puddle under it... LOL Put that old V8 to work.... just baby it, parts aren't around like they use to be.

WOW that went for $1625. It was worth more in scrap!!!

It is sad too see when a Big Dog gets kicked out of the dog house. It is just a matter of time before it is sent on the way to the pound... How do they keep that water tank from freezing in the winter time, or is this temporary? Sharp looking rig but showing signs of neglect. Hoping for the best but seeing a good old dog being abused. Someone needs to come to the rescue or at least kick the crap out of those guys doing the crime and leaving that Old Dog out in the weather. Probably garaged most of its life... just a crime.

Hope it is the injector. If a head is cracked it will start at the injector hole, and run to the exhaust valve seat. You will see the crack, and can be as small as a hairline or as big that you can catch your fingernail in it. If it goes all the way to the exhaust seat stay away from it. If it is only a hairline that is partial and stops before the seat it maybe OK. This is the same for E9 heads but have two exhaust valves.

First get the injector out ands have it checked at a injection shop. That maybe all that it is.. a bad injector. There is an actual expansion joint in the area of the head between the valve seats. I have not heard of successful welding these heads or E9 heads. When their cracked it is for good and in a bad area by that joint. It is a problem with these engines and if the crack is big enough and goes into the exhaust valve seat, the insert can fall out and hang the valve open... bad for the valve and piston. It sounds worse than it actually is... Just about every 865/866 has at least one or two cracked heads. I went through 18-20 heads to find 3 good ones and one with a very small crack for my rebuild. Some were really bad, certainly leaked and would given a little time drop the valve seats if run hard. If it is a hobby truck your will not be running it hard and could be OK for a long time just putting around if it is a head issue.

The only two things that warrant Ether with a diesel is a lot of blow-by. Even harder to start after sitting or in the cold. The other is a bad charge/ lift pump or the injection pump not building pressure at low RPM's. I have had both problems with some of the engines around here. You can rule out the blow-by because it died just sitting there or after running and warm. The pump is a little harder, Does that rotary pump have a charge/lift pump originally? Sound like the previous owner had the same problem, installing a electric lift pump already. I have been talking about charge pressure in another post. See what the pressure is from the electric pump first. If you got a few PSI, then it's you injection pump. Both may be gummed up from sitting, is there any way to run some cleaner through it on the engine? Worst thing have the injection pump worked on if you can find someone. I has seen in a photo a 1 1/2" hose with plug under the dash of a B so the driver can give the engine a shot of Ether from inside the cab. It would work... what else would it be for.... LOL

100psi oil pressure is a little high but with additives is realistic, too high and you can blow the filters off the engine. As long as you don't go below 30psi hot things are OK. Just make sure you set a high idle of about 800 RPM's to warm it up good. and get the pressure down a little. The only seal on the bottom of the injectors is a copper washer, most times they can be reused or I have anyway. Hope it is just the injector. Not to scare you but if you are getting fuel up around the injector it maybe a cracked head. These older V8's cracked a lot of heads. The crack runs from the injector nozzle to the exhaust valve seat. I know, went through a pile of heads to find 4 good ones for my 866 rebuild. Real nice truck... Real nice

Need to run them a little more.... or at least idle them... LOL

There should be some maintenance records on that truck somewhere. Check the original dealer it came from. Even if it was owner fleet maintained they would have records. Just ask the seller for the record for your reference and maintenance cost, shouldn't be a problem...Right. If I remember right I bought a 93 CL700 with 17,000 hours and 390,000 miles. It was a local oil field truck and didn't seem too far out of line. I know the Speedo was correct from the records, avg 23 miles per hour. Ran good the great oil pressure.

I heard that if the charge pressure gets much more than 100psi it will blow the secondary fuel filter right off the engine. I just replaced the gauge to see pressure. That filter is just like the construction of a oil filter and seen those blow off at 120psi. That would be REALLY bad hanging right over the right exhaust manifold. Still would like to know the range that the galley pressure should be. Know so far 20psi seems low and 100psi is too high. I got a 13mm pump as well that has been worked on. It does return a lot of fuel to the tank. I could only see it running out of fuel running wide open maybe, not normal driving. The engine has only 12,000 miles on the complete rebuild and all lines were replaced then, 1/2 inch to and 3/8 from pump... but could still be bad from sitting. Looking back at when it was missing and spitting. I had below a 1/4 tank of fuel and was getting on it. The fuel pick-up is in the lower front bung hole in the tank. From what I have seen a lot of fuel is running out and into the tank. Probably got all the fuel to the back of the tank, accelerating, and was sucking air. Guess I have to have over 1/2 full tank to go drag racing or change the pick-up, I'll change that when the truck is restored in a year or so. A working gauge would have shown that I think.

Thanks, I'll have to get it out on some deserted road out here and wick it up. Any place else the Fire Dept would be called for the smoke...LOL I did exactly what you said with the gage already to make sure it was not something in an old line, it is wire tied up by the windshield. The pump at idle really puts a good stream back in the tank, plenty of flow. There would be a point that the volume of fuel will not flow through the valve and pressure will rise. I have the govenor RPM's raised so the charge pump should keep raising pressure, good point. Maybe the miss and stubbly was due to old fuel that I did drain already. On the PT pump Cummins pinching the return line was the 2 cents way of putting more fuel to the injectors if I remember right. Not the right way but drivers did it to get more power. More than a few burnt pistons and valves I am sure.

I've been having an issue with my E9 Superliner. It starts and runs fine and if just put around don't skip a beat. If I step it a little, blow a little smoke, it noses over and start missing and sputtering, like running out of fuel. I get out of it for 10-15 seconds and it recovers. It ran Great before being garaged for 2 years. Now issues and I want to take it cross county this year. Getting to the point it has a fuel pressure gage, broke since I got the rig. I put a new gage in it today and got 20 psi. I wonder if too low and putting air into the injector lines. This gage reads galley fuel pressure, what the charge pump is putting to the injection pump. The broke gage was stuck at 80psi. So I took out the return restrictor and took out the copper seal ring and got 30psi. it seems that this part is losing the spring pressure over time. Have any of you had experience with the return restrictor going bad? My thought would have been the charge pump but it is returning a steady stream to the fuel tank even with the increase in pressure. What is the the normal galley pressure for a Bosch pump. I don't think it is different for V or inline E9 pumps.

Time seem to fly the older we get... Go and say Hi you might get a filter for just taking your truck over... It will certainly make the previous owners day and maybe set you up to get some other stuff. Just say your bring it in for scrap.... what would they give you for it? That would be a day they all would remember.. Just for fun.. LOL Nice truck, and it should really move with that engine and tranny combo.

I was wondering about that oil bath filter, with as much air as that 237 will eat it is at the edge of sucking oil right out of the bath. I converted to dry when my turbo V8 went in as well. Paid $200 for a stainless take-off from Strickland's Salvage. Are you close to Adelman's Truck Salvage? They should have a pile of filters from just about everything. $100 should get one...

Boy, I miss read that post, The dealer should stand behind an engine failure on that Reman and be kissing his ass. Put the repair on the fast track and do a few service and oil changes for free just to check that all is OK.

Thanks for the kind thought but... NO they are not taking care of me now or ever probably. I am not taking care of them anymore without a drastic change in their attitudes!! They can live in the house for a few years but the rest is on them. Hope they figure it out before they start living under a bridge somewhere... I worked my ass off 70-80 hours a week for 25-30 years to get ahead. I found satisfaction in making my own way taking the good with the bad and knowing that no one else was going to help me get ahead. They don't have a clue but to beg, sorry demand, for money and once they get a little forget how I am. Well it works both ways from where I come from. They are young men so start acting like one. I did my best to raise them right..but Affluenza is really messing up their brains. I started a little rough in my youth, and did not come from much, but straitened out quick once my brain turned on around age 20-21... so I hope.

Paul, It is never their fault just as you point out and someone else made them this way. This is off the subject of Mike's engine but one that just blows my mind. I have two boys 17 & 18, they had the world by the balls... but not anymore. They suffer from an extreme case of Affluenza, It is a condition that is infecting many of today's youths in epidemic proportions. It is the case of where no work, ethics, respect, morals or nothing less that total self indulgence is the goal. And oh ya someone else has to pay for everything, ask no questions and expect NOTHING in return. The best one that the boys told me: We didn't ask to be born or live in your house, in a real nice community... but since we do, dad you need to keep us in that lifestyle image because we live with you. We don't have to work just give us money, school grades are nothing and how cares anyway. We don't know if we want to go to college but if we don't can we get the money you set aside for it? We may want to start a business like you but don't want to learn from you, just give us money. I got issues, with my boys, but just think about it. It is the way this great country is going with the young point of view: I did not asked to be here, but since I am I don't have to work or contribute to society. The government needs to pay for everything. Oh and tax the few that do work and are trying to make a difference. I was an employer as well as an employee and tried to made a difference from both sides. For many of us we were expected to do better than our parents and they were proud if we did, financially, educationally and socially to name a few. With the attitude of my boys and others, they are not going to make too much of themselves but I hope.... OK back on track, Mike's engine.....

Sorry to hear about all the trouble. Sound like there is a Quality issue at Mack. We all have had something to say about it for years it just sucks that it is hitting so close to home these days. The lack of Quality and caring about a good job is everywhere. Hell my mother still had her Maytag washer for 45 years before she died. I get a new one 5 years ago and next time it needs service it is out on the curb. Right down to most everything produced now it is NOT built to last as it did just even 20 years ago. Wonder if that is the same train of thought with Mike's engine. It may have been built to last the first time but... the old guy needs to get a new truck every 5 years now... not. It is possible that the quality is not in the parts being used or skilled people now days and not to expect yesterday's quality and care with today's standards. We are old farts living in the past and fading with the Quality we once knew and expected.

Wow, Ex-firetruck. Probably actual 15K miles on the clock and maintained perfectly. Automatic, 865/866 V8 what is not to like for $1100 now. Wow, Bow, Wow... that is one dog worth saving. Can over look a day cab for that price. Hell put a 24-30 foot box on it and have a RV. It would be cool for little money. It would be really cool pulling a matching 28 foot pup trailer. Wish I had more room and time.

I am one of the Hot Rod E9 guys and would not be the one to steer you to a stock turbo. A nice upgrade would be a Borg Warner though. Have a few old turbos laying around but... You might hurt yourself or your engine for sure. I can tell you that back in Sept. I got manifolds and a fan clutch from CL733 in parts for sale. He had a used turbo for a E9 as well for $200. After getting my parts I would not be afraid of getting that turbo from him for a stock engine. Just checked but he has not been on BMT since Oct. If you want I can try and find his phone number. Get that turbo and have yours rebuilt for a spare. A rebuild and/or exchange should be less than $1000 anyway, far less than a broke engine running a bad turbo. About 2-3 hours for the job should be a one nighter and not disrupt your schedule at all.

High idle would be around 850-900rpm. I run mine there to warm-up or if it is running parked for over 15-20 minutes. The turbo oil spill is out on the engine or out the stacks? Either way you have bad oil seals, shaft wear or a plugged oil return line from the turbo. It is real bad if you start leaking oil into the intake side. Get the turbo replaced before you have a run away and a junk E9.

Larry, you sure that the tires were not breaking loose? Or maybe that material just needs to get a little heat in it to stick. Did you get the pressure plate done with clutch? When I did the B, sent both to South Bend they put a few hundred more pounds of spring in when I told them what I was putting it behind. no problems sense. The Superliner has 4000lbs of spring, it give the leg a work out....LOL

That is a nice truck like the colors and steel 5 holes. I know what the engine tag stamp says.... but that is more than likely not the original engine. it does have the newer style manifolds and has no piston coolers, or bosses for them, not normal, for a big HP 335. Most over 300HP Cummins had coolers and under did not. Love the 3 stick, 27 speed forward, 6 reverse, got that in my LTL, guys just look and shake their heads. Just Cool.