| Author |
Message |
Bob Baldwin (Bob4106) (66.56.100.54)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, September 03, 2003 - 5:52 pm: | |
whats normal for a 1962 8v71 oilpressure. And should you run like
2 quarts down on oil,
purposly cuz it would just puke out puke tube...getting a little blow by, Is this a normal thing or is this mean lots of wear on motor. The man says 35000 on rebuilt got me woundering you help would be helpful |
Richard Bowyer (Drivingmisslazy) (24.196.191.70)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, September 03, 2003 - 6:05 pm: | |
Hot, my 8V92 oil pressure at idle is 5-10 pounds and 40-50 at highway speeds. Most recommend running a couple of quarts low.
Richard |
Bob Baldwin (Bob4106) (66.56.100.54)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, September 03, 2003 - 7:19 pm: | |
ok thanks wanted to hear from someone else new at this |
Abajaba (12.217.194.92)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, September 03, 2003 - 8:24 pm: | |
I was told when I started driving a commercial bus with an 8v92ta in it that we were supposed to leave the oil level about half way between add and full. That way we wouldn't lube the road as much.
As to pressure during idle and running it sounds about right. |
Bill K. (209.173.121.49)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, September 03, 2003 - 8:38 pm: | |
35000 miles on a rebuild is a little low or did you mean 350,000. I have a 8v92 in a truck on the third rebuild and it has 260,000 and is running strong. I always run the oil on the stick about half way between add and full. works for me and has been for over 35 years. |
John Rigby (24.174.236.244)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, September 03, 2003 - 8:47 pm: | |
I keep my 671 oil right on the full mark. I heard that every quart of oil helps keep the temperature down. Oil pressure at idle 5lbs.
Down the highway at 40 ibs.
John |
Jayjay (198.81.26.104)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, September 04, 2003 - 1:35 am: | |
Bob, with a 7 gal. sump, you can safely run an 8V71 three gal. low.(From Detroit's book) I have found that the first gallon disappears quickly, then it settles down to a gallon every four thousand miles. 8 to 10 PSI at idle and anything above 20 at highway speeds is quite acceptable. Cheers...JJ |
FAST FRED (67.75.110.38)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, September 04, 2003 - 5:19 am: | |
When you run against Da Book
Which prefers FULL ,
(Defined as run the engine warm, shut down & wait only 10 min or so and then check,),,
Your on your OWN for service life.
Yes, the dipstick will be above full before a cold start .
For GM owners it is especially important to keep FULL as the sideways oil pan allows the oil to gravitate to one side or the other in sharp turns.
First sign you are low is any fluctuation (Bouncing down) of the oil pressure underway.
This is pumping air in the oil.
IF the engine leaks its time for a couple of gaskets, not running it half full to "save" oil.
FAST FRED |
Johnny (67.242.221.221)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, September 04, 2003 - 8:28 am: | |
My uncle (drove & wrenched on big-rigs forever) always ran any DD slightly under the "full" mark...probably about 2-3 quarts low. It seemed to cut the oil consumption considerably. |
Peter Broadribb (Madbrit) (170.215.59.102)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, September 04, 2003 - 11:20 am: | |
The same goes with my 1991 Ford 7.3 NA diesel, always leave it a quart short as it looses it anyway.
Never runs hot, even with a car on a trailer and heading up the hill from Laughlin NV to Kingman AZ it barely gets more than a few degrees above its normal running temp.
Peter. |
Paul Tillmann (Paultillmann) (24.105.207.202)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, September 04, 2003 - 1:21 pm: | |
My 8V-71 will use the first gallon in about one hundred miles and the next gallon in about 1500 mi. I always keep mine hovering around the low mark on the dipstick and I very seldom have to add any oil. I've heard this is the case with many 8V-71's. At first I thought my engine was shot till I talked to an old time truck driver that told me to run it low and see what happened. He was right, my 315K mi. 8V-71 uses hardly any oil now and the back of my bus stays a lot cleaner.
Paul |
Johnny (67.242.221.157)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, September 04, 2003 - 9:21 pm: | |
Hmm........I wonder if there could simply be a problem with miscalibrated dipsticks? |
FAST FRED (67.75.110.86)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, September 05, 2003 - 7:01 am: | |
Most 8V71 need the oil 1 inch below the oil pan gasket at full.
FAST FRED |
Richard Bowyer (Drivingmisslazy) (24.196.191.70)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, September 05, 2003 - 7:19 am: | |
I was told that full was supposed to be at the pan gasket level. Anybody have anything from DD that states where it should be? One inch lower could probably eliminate the problem that most of us have with DD's blowing oil for the first thousand miles or so.
Richard |
Tom Connolly (Tomconnolly) (148.78.243.123)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, September 05, 2003 - 9:26 pm: | |
I remember reading 1 inch below the pan gasket.
Tom C |
Jim Shepherd (165.121.177.111)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, September 05, 2003 - 10:36 pm: | |
Mike Meloche of Detroit Diesel has made the statement at every Bus Conversion Seminar that I have been to (several) that the oil should be 1 inch below the pan gasket. He also says that there are a lot of mis-calibrated dipsticks for many reasons.
Have never tried to figure out how to measure that.
Mike has over 30 years with Detroit and really knows his stuff.
Jim Shepherd
Evergreen, CO
'85 Eagle 10 |
Richard Bowyer (Drivingmisslazy) (24.196.191.70)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, September 05, 2003 - 11:22 pm: | |
I was told to measure the outside of the dipstick tube from the top of the tube to the oil pan. Add one inch to that measurement. Then measure down this distance on your dipstick from the top that seats into the tube. That would then be the full mark.
Unfortunately the guy that told me this forgot to tell me to add one inch to the first measurement so I have been running my engine one inch above the correct full mark.
Richard |
JohnRigby (24.174.236.244)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, September 06, 2003 - 10:21 pm: | |
When I had my overheating/head problem at last years california rally. Mike,s diagnosis of what was wrong after he looked at the head ,block cylinder ,gaskets etc was way way off. A couple of bus nuts hit it on the head, but sorry not Mike.Stuck with the engine apart 2000 miles from home, listing to 10 things it could be from Mike, was not a good feeling.
John |
Geoff (Geoff) (66.238.120.238)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, September 07, 2003 - 1:48 pm: | |
So John, what happened? I don't seem to recall yor story.
--Geoff |