| Author | Message | ||
| William Fenske (Will_4104)
Registered Member Username: Will_4104 Post Number: 5 Registered: 3-2011 Posted From: 68.205.191.134  Rating: N/A |
Was hoping someone on this site would be so kind as to tell me where to find the serial numbers on a 6-71. Please note I do have a parts book and manual but had no luck finding the information. Any help would be greatly appreciated. Will4104 | ||
| Dal Farnworth (Dallas)
Registered Member Username: Dallas Post Number: 742 Registered: 7-2004 Posted From: 98.20.57.197  Rating: N/A |
William, if it's for your 4104 it should be behind the oil fill stamped on a machined boss. However, Many of the old 6-71's didn't have a serial number stamped onto them. Some had a custom number, like mine from Trailways.. the only number is 1366. There could also be a plate riveted on at the time of rebuild with pertinent information but no serial number. Good Luck. DF | ||
| William Fenske (Will_4104)
Registered Member Username: Will_4104 Post Number: 6 Registered: 3-2011 Posted From: 68.205.191.134 Rating: N/A |
Thank you Dallas, it is for the bus. There are numbers behind the oil dipstick that are on a machined boss,5111434 with the letters CFD below and to the right is the number 126 above the number 69. Would you know if these mean anything? | ||
| Dal Farnworth (Dallas)
Registered Member Username: Dallas Post Number: 743 Registered: 7-2004 Posted From: 98.20.57.197 Rating: N/A |
William, The 5111434 is the block part number. It was probably sold as a bare block to replace a broken one. After a quick google search it appears to have been a pump engine, (maybe) I don't have my books here at the house to look it up. The "CFD" could be the owner of the engine, possibly a fire department? Dunno. Could also have as easily been a marine engine or a generator engine. I'm just guessing on all this information except for the part number. It's not unheard of to have an engine that was originally used in one application and repurpose it to another, sometimes with some extensive modifications. The only real way to tell is to take the valve cover off and see what injectors you have and how many valves there are. That's what I was referring to on the other board. These engines are long past having any useful information contained in the serial number. Good Luck, BTW, my little 160 HP 2 valve head 6-71 consistently delivers 9.5 mpg and has gusts up to 13.5 on the flats. I thought about going to a newer setup with the 4 valve and turboing, but at 64 mph, this is good enough for me, I'm not in any hurry. DF | ||
| Patrick levenson (Zubzub)
Registered Member Username: Zubzub Post Number: 303 Registered: 5-2007 Posted From: 70.51.29.213  Rating: N/A |
Woo Hoo let's here it for the 2 valve. Keep it simple, keep it slow, | ||
| les marston (Les_marston)
Registered Member Username: Les_marston Post Number: 386 Registered: 1-2010 Posted From: 68.151.225.213  Rating: N/A |
Dal How does that 160 hp do in the hills? Second gear can be a grind. Our coach has only a 6 cylinder as well but I think it is at 425 hp. Still get better than 9 mpg with it | ||
| Dal Farnworth (Dallas)
Registered Member Username: Dallas Post Number: 744 Registered: 7-2004 Posted From: 98.20.57.197 Rating: N/A |
Les, At under 26,000 lbs. it does great. If I was pulling my trailer with a car and tools on it, then probably not so good. Normally I can climb in 3rd, with slips into second. I keep thinking about putting a Series 50 or a Cummins with an Allison in, but that's a lot of work. | ||
| marvin pack (Gomer)
Registered Member Username: Gomer Post Number: 1558 Registered: 3-2007 Posted From: 76.4.123.74  Rating: N/A |
My 04 has a 4-valve head with N-65 injectors and will cruise at 70 with no problem and will pull better than the older 2-valve with c-60's in it. fuel mileage is averaging about 13-15 no problem. Gomer | ||
| john w. roan (Chessie4905)
Registered Member Username: Chessie4905 Post Number: 2174 Registered: 10-2003 Posted From: 71.58.71.157  Rating: N/A |
15????? Are you sure you aren't mistaken? I'm calling that. | ||
| Dal Farnworth (Dallas)
Registered Member Username: Dallas Post Number: 745 Registered: 7-2004 Posted From: 98.20.57.197 Rating: N/A |
Chessie... he means 5 1/2 in town and 9 1/2 down hill! LOL. (Sorry Gomer, I couldn't help myself!) | ||
| Jack Fids (Jack_fids)
Registered Member Username: Jack_fids Post Number: 971 Registered: 1-2009 Posted From: 72.211.145.15  Rating: N/A |
Gomer pulled you all in by using IMPERIAL GALLONS... | ||
| les marston (Les_marston)
Registered Member Username: Les_marston Post Number: 388 Registered: 1-2010 Posted From: 68.151.225.213 Rating: N/A |
they aint that big | ||
| marvin pack (Gomer)
Registered Member Username: Gomer Post Number: 1559 Registered: 3-2007 Posted From: 76.4.123.74 Rating: N/A |
Ok guys LOL It is true that if[?] I keep my feet out of the floor and rest them at about 65-70,I will get at least 14-15 mpg. Now with the NEW fuel it will make a difference because they took all the guts out of the stuff and instead of draining the bottom of the barrell of oil for our fuel,they are going after our purses. Not Imperial gallons either lol Dallas NOT!! CHESSIE< How dare you, LOL Gomer | ||
| john w. roan (Chessie4905)
Registered Member Username: Chessie4905 Post Number: 2175 Registered: 10-2003 Posted From: 71.58.71.157 Rating: N/A |
check your speedometer accuracy(odometer). Maybe others will chime in that get 13 to 15........crickets chirping.... | ||
| Dave Walker (Chrome_dome)
Registered Member Username: Chrome_dome Post Number: 399 Registered: 3-2010 Posted From: 74.41.14.235  Rating: N/A |
Gomer the hitch goes on the back of the bus? You've been towing it with your truck. LOL Chromie | ||
| marvin pack (Gomer)
Registered Member Username: Gomer Post Number: 1560 Registered: 3-2007 Posted From: 76.4.123.74 Rating: N/A |
Well guys That is MY story and I'm stickin to it LOL Chromie; now I know how to get better mileage LOL Chessie: Do they have a speedo on coaches? I just use old GPS LOL Gomer | ||
| Jim Wilke (Jim Bob) (Pd41044039)
Registered Member Username: Pd41044039 Post Number: 712 Registered: 2-2001 Posted From: 184.0.13.120  Rating: N/A |
Gee Gomer, I gotta find out what you have there. My 2 valve '04 with N65 injectors and the 3.55:1 "tall" axle ratio & 12 x 22.5 radials gets 9.9 (it's best ever mileage on the flat). PLEASE let me know what I can do to gain your 30-50% mileage increase!! You must have Mouse Milk oil in the engine, trans & diff. or something. Maybe 300 psi in the tires? A 2-71? Come on, spill the beans! | ||
| Steven Foster (57_gmc)
Registered Member Username: 57_gmc Post Number: 61 Registered: 12-2010 Posted From: 24.151.174.38  Rating: N/A |
Well for what it worth I have the 57 GM 4104 with a 2 valve with N65 injectors with the 22.5 radials and run it hard when we on I-65 70 MPH @ 2100 rpms. Now here in Tenn we have few hills but Im getting 10.9 to 11.1 MPG. Checked it 3 times and hope it going to make it to Fla in Dec. Engine got about 3500 miles since Overhaul. Thanks Steve | ||
| Jim Wilke (Jim Bob) (Pd41044039)
Registered Member Username: Pd41044039 Post Number: 713 Registered: 2-2001 Posted From: 184.0.13.120 Rating: N/A |
Well Steven, it looks like I may be suffering from "Tired Motor Syndrome". Can't tell you when mine was overhauled but probably 35 years sounds right. I have heard lots of '04 owners say they broke 10mpg but I haven't. | ||
| Dal Farnworth (Dallas)
Registered Member Username: Dallas Post Number: 747 Registered: 7-2004 Posted From: 98.20.60.176 Rating: N/A |
Jim, 9 1/2 - 10 isn't hard to achieve in a 4103-4104. First thing to understand is that it ain't gonna get away from the light like your fathers Oldsmobile, or even his VW Microbus. Next, make sure the tune up is correct.... That will go a long way to improve fuel mileage. Third.... DON'T LET THE RPM's DROP!.... If you are climbing a hill and you can't accelerate, drop a gear. The biggest thing is the iron in your blood. It turns to lead and settles in two places... your behind and your right foot. We can't do much about the behind part, but we can teach you to lose some of the gravitational pressure in the right foot. | ||
| Rick Cribbins (Rc38)
Registered Member Username: Rc38 Post Number: 23 Registered: 4-2004 Posted From: 71.92.135.185  Rating: N/A |
Hello Everyone, After reading this post I went and pulled my engine numbers: 1287(real small font) 6A360662*(star) 1063-7000 Does any of these mean anything outside of DD? Thanks! Rick | ||
| Gus Causbie (Gusc)
Registered Member Username: Gusc Post Number: 1388 Registered: 11-2005 Posted From: 72.156.194.7  Rating: N/A |
These big numbers have to be Kilometers/gal!! | ||
| Steven Foster (57_gmc)
Registered Member Username: 57_gmc Post Number: 62 Registered: 12-2010 Posted From: 24.151.174.38 Rating: N/A |
Gomer: I did forget that most of the time I have Jet-A fuel in my bus. I have sometimes 150 gals that we cant use in aircraft and I will dump some Auto trany fluid in with it and it runs great so far. Also the the pistons has the top ring in it for the higher compression. Steve | ||
| marvin pack (Gomer)
Registered Member Username: Gomer Post Number: 1562 Registered: 3-2007 Posted From: 76.4.123.74 Rating: N/A |
Does Charlie Brown Ring with anyone here?? gomer | ||
| les marston (Les_marston)
Registered Member Username: Les_marston Post Number: 391 Registered: 1-2010 Posted From: 68.151.225.213 Rating: N/A |
Don't believe it Gomer. You aint never going to get to kick that football and the great pumpkin will not rise in your pumpkin patch this or any year. | ||
| Rick Cribbins (Rc38)
Registered Member Username: Rc38 Post Number: 25 Registered: 4-2004 Posted From: 97.120.127.173 Rating: N/A |
Ok, From I can figure out, my engine was built in 1977, Industrial application, starter and oil cooler on the left as viewed from the rear (duh), 4 valve "N" engine. Does the "N" mean it was a pancake style or "N"ormally aspirated? I've seen used both ways, but I'm sure it just refers to the intake. I still need to pull the V/C and verify 4 valves, but I'm optimistic it is. Rick |