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Detroit:71 Series |
Converting From Turbo To Non Turbo |
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Wed Sep 1 10 1:09 PM |
Sep 1 2010
01:09 PM |
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Tom
What do you have to do to convert a turbo 6-71 (1986) to run without turbos |
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Detroit:71 Series |
6-71N J & T coolant overflow problem for experts |
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Wed Sep 1 10 11:13 AM |
Aug 24 2010
04:31 PM |
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Encaa5
I reported earlier problem of coolant overflow. Engine has less then 70 hours since rebuilt 2 1/2 years ago. Coolant still overflows recovery tank and fills 1 gallon plastic jug under the recovery ta..... |
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Aug 27 2010
05:36 PM |
#3 |
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Encaa5
Thank you for questions. The coolant will keep flowing out. I do not fill up to cap after each run as I thought it was too full.
Head goes back on tomorrow morning. I hope it is just one of tho..... |
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Aug 30 2010
05:04 PM |
#4 |
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Encaa5
Head was reinstalled on Saturday after being checked. I was hoping new gaskets would solve problem but it still exists. A 1 gallon jug under the plastic recovery tank will fill with anitfreeze in less..... |
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Aug 30 2010
05:43 PM |
#5 |
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Mds
This is a simple engine as its a natural. The common faults for this symptom are found in the exhaust manifold and head.
My guess is you still have problem with the head. Cylinder pressures are grea..... |
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Aug 30 2010
06:08 PM |
#6 |
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Encaa5
The head was presuure tested using air with the injectors installed. Is this a fool proof way to test injector tubes? |
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Aug 31 2010
01:23 AM |
#7 |
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Ski in NC
No, as MDS posted, a bench p-test does not tell the full story. If it leaks on the bench, it is bad. If it passes on the bench, that does not mean it is good. Firing pressure is something like 1000..... |
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Aug 31 2010
06:29 PM |
#8 |
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Encaa5
SKI and MDS
Thank you very much for your help.
I am inclined to agree, though I have no experience, but what do you do? A Detroit head is $3900 plus refundable core charge of $600. Is there a w..... |
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Aug 31 2010
09:43 PM |
#9 |
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Cap10Pat
Just want to check one thing you left hanging, unless I missed it.
You said you do not replace the fluid. Does that mean your coolant is low? Or is it being replaced by something else? |
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Sep 1 2010
04:40 AM |
#10 |
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Ski in NC
Some older detroit shops have the tools to replace the injector tubes. With tubes removed, inspect the tube seating surface from the hole above. Must be squeaky clean. Do a pt inspection there for ..... |
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Sep 1 2010
11:13 AM |
#11 |
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Encaa5
Capt10pat
I replace the fluid with either water or mix of antifreeze and water |
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Detroit:71 Series |
replacing heat exchangers TIB´s |
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4
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Tue Aug 24 10 9:09 PM |
Aug 22 2010
10:55 PM |
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N. Cole
After some hot days on the chesapeake bay and 1000 hrs. on 485 tib´s i THINK in need to replace at least one of my heat exchangers because of possible leaks. So here is the question, I dread to see th..... |
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Detroit:71 Series |
Ballpark rebuild costs |
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Sat Aug 21 10 7:45 PM |
Aug 21 2010
06:47 PM |
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CaptJ
I´m looking at a 1990 Boat with twin 6-71 TIB´s, and unfortunately, the total hours is uncertain on both, but at least 2,000 hours (maybe as much as 3,000 on one of them).
I´m lookuing for some ballp..... |
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Detroit:71 Series |
How many hours is too Many on 1988 671TI´s? |
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Fri Aug 20 10 2:23 AM |
Aug 20 2010
01:21 AM |
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Jmills
I am looking at a 41´ Hatteras that has been very well maintained and the engines are clean as a whistle. The only draw back is that they are 1988 671 TI´s with 3100 hours with no record of rebuilds...... |
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Detroit:71 Series |
fuel delivery rate -v- fuel consumption for 8V71ti´s |
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Thu Aug 19 10 3:51 PM |
Aug 19 2010
03:51 PM |
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Chris
Trying to hook up floscan meters to my 8V71TI´s with N70 injectors. Need to know the fuel delivery rate (not the fuel consumption rate? Anybody know? |
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Detroit:71 Series |
Lube Oil Pressure Light |
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Thu Aug 19 10 12:16 PM |
Aug 16 2010
04:33 AM |
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Msobota
The "Lube Oil Pressure" light for my starboard engine (12V71TI) is illuminated.
All of the temps, oil pressure, power is normal. This happened during the delivery trip. I assumed there ..... |
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Detroit:71 Series |
Loosing Fresh Water |
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5
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Wed Aug 18 10 8:24 PM |
Aug 15 2010
02:02 PM |
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Tomtdm
I´m loosing fresh water on port 671-DD. I have no sign of leaks, Oil pan does show water. Where can the water be going to? I appreciate any ideas that anyone can give me. |
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Detroit:71 Series |
Rpm reduction |
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6
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Thu Aug 12 10 2:13 PM |
Aug 10 2010
03:06 PM |
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Bill
I just replaced my m15 injectors with 90´s. By doing this i now only get approx. 1860rpm´s on both motors at full load. Same props with the m15´s I was getting 2450 easy. The rack has been checked, fu..... |
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Detroit:71 Series |
Object attahced to the spin on fuel filter |
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3
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Thu Aug 12 10 2:08 PM |
Aug 12 2010
12:48 AM |
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Mike
I recently posted about a fuel leak coming from the area of my spin on fuel filter. This past weekend I had the admiral driving the boat while I had the pleasure of hanging out in the engine room to ..... |
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Detroit:71 Series |
8V-71N Replacement Engine |
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0
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Tue Aug 10 10 10:56 AM |
Aug 10 2010
10:56 AM |
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Paul
Hi,
Help needed! We currently run a fleet of 8V-71N marine engines and basically we want to swap this engine out with a brand new engine (a currently available brand new engine). I have researched t..... |
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Detroit:71 Series |
45 Hatteras with 871-TI´s Sea Trial |
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9
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Sun Aug 8 10 3:00 AM |
Jun 2 2010
05:34 PM |
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Jimmy
Well I did a sea trial on the 45 I have a contract on. It is a 1972 45 Hatteras Convertible with 871-TI´s. The Port has about 500 Hrs since overhaul and the Stbd. has about 350.
On a cold start th..... |
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Detroit:71 Series |
Racor CCV System Output |
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0
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Wed Aug 4 10 4:22 PM |
Aug 4 2010
04:22 PM |
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Mark
Installed Racor Closed Crankcase Ventilation System (4500) on my 671TI´s last year. They drain into clear bottles and not into the oil pan so I can see what each engine is producing (thanks to this w..... |
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Detroit:71 Series |
Oil Blow by |
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3
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Tue Aug 3 10 2:07 PM |
Aug 3 2010
12:48 AM |
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Tomtdm
I have Detroit 671 engines.The port over heated due to broken clamp in a hose. After this happened I´m getting oil leaking via the oil dip stick.
Any inexpensive solution or do I need to overhaul th..... |
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Detroit:71 Series |
6-71N engine coolant system flushing |
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1
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Mon Aug 2 10 8:29 PM |
Aug 2 2010
06:37 PM |
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Encaa5
The overflow from my expansion tank had a heavy dark brown residue in it. I was told that the anti freeze should be drained and engine flushed with the 2 part dry powder system. Does anyone have a ma..... |
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