Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 09-10-2019, 23:37   #31
Registered User

Join Date: Oct 2019
Posts: 7
Re: Detroit Diesel

Thanks for reply lepke.
I have removed and tested the oil cooler and hydro tested the head with injectors out to check injector cups. That was all good. She got hot about 2 yrs ago but didnít show signs of cracked head Then. It sat up for about 3 mo before it showed water in oil. Now Iím hoping head gasket kit. But I canít seam to get it off. On each end of the 471 there is hardly no tolerance Iím thinking itís rusted in but not sure I want to make sure thereís no bolt somewhere before I get to rough w it.
__________________

Jrmcnabb9 is offline   Reply With Quote
Old 10-10-2019, 01:38   #32
Senior Cruiser
 
GordMay's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 38,198
Images: 241
Re: Detroit Diesel

Greetings and welcome aboard the CF, Jrmcnabb.

Is it an In-Line, or V-Series engine?
FWIW: In Line (1993) 71 Series Maintenance (workshop, repair) Manual
https://avtec.edu/sites/default/file..._srv_man_0.pdf
__________________

__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is offline   Reply With Quote
Old 10-10-2019, 01:57   #33
Marine Service Provider
 
oldcal46skipper's Avatar

Join Date: Jan 2010
Location: Bayou Chico, FL 32507
Boat: Cal Cruising 46 - SATORI
Posts: 339
Re: Detroit Diesel - 4-53

A friend who has only been a commercial shrimper his entire life got cancer and can no longer go to sea. He had a classic 35' wood shrimp boat with the DD 4-53. I have the engine now and it is available. Runs perfectly with BW Velvet Drive 3 to 1 Redux & forward PTO to pull nets.
Here she is setting next to a PerkyClick image for larger version

Name:	IMG_0453.jpg
Views:	41
Size:	428.9 KB
ID:	201272


I fix engines, but can't figure out how to post pictures??? Can someone turn this picture over for me?



If I were younger than 81, I would get a boat it fit and run it just so I could hear that sweet DD sound. Reminds me of the gensets we had in the USMC in the 50's.


A neighbor here on Bayou Chico has a converted wooden hull with twin 6-71's. Whenever he is backing into his slip, I always stop and go listen.



Life is good!
oldcal46skipper is online now   Reply With Quote
Old 10-10-2019, 02:52   #34
Registered User

Join Date: Feb 2015
Posts: 26
Re: Detroit Diesel

Try using starter motor with all injectors in place just head bolts loosened ie using compression to lift the head, hopes this helps
Otherwise try lifting the head with overhead gantry.
or use rubber hammer to move the head sideways / or any direction.

Just make sure it's the head problem and not somewhere else causing loss of coolant. Have you done a compression test

Good luck David
drcot3 is offline   Reply With Quote
Old 10-10-2019, 05:20   #35
Registered User
 
Sailmonkey's Avatar

Join Date: Sep 2009
Location: Houston
Boat: '76 Allied Seawind II, 32'
Posts: 7,930
Re: Detroit Diesel

Quote:
Originally Posted by Jrmcnabb9 View Post
Hello.

I need alittle Help. I have one of these ole early 70ís Detroit. Itís a n471. I have it in a small 32í shrimp boat. Single screw. Love it itís the best. ďIf thereís no oil under them thereís no oil in emĒ.Lol

How ever the 471 is down rn with water in oil. I tested the oil cooler, test for leaking injector cup. That was not the prob.

Today I attempted to remove my head and it would not budge. I removed obviously the head bolts, the two bolts at the front of the motor and two bolts in the rear of the head. Has anyone here ever had such a problem w the head stuck to the top of the block?

. Anybodyís words of wisdom would be appreciated.


Are you saying youíve only pulled four head bolts?

I want to say thereís something like ten that hold that head on.
Sailmonkey is offline   Reply With Quote
Old 10-10-2019, 06:05   #36
Registered User

Join Date: Oct 2019
Posts: 7
Re: Detroit Diesel

Hey thx for that gordmay I needed one I’ve been referring back to an old 53 series manual but it’s so old looks like incests got a hold to a lot of the pages. Unfortunately for me they are very vague when it comes to this part.
Jrmcnabb9 is offline   Reply With Quote
Old 10-10-2019, 06:07   #37
Senior Cruiser
 
newhaul's Avatar

Cruisers Forum Supporter

Join Date: Sep 2014
Location: puget sound washington
Boat: 1968 Islander bahama 24 hull 182, 1963 columbia 29 defender. hull # 60
Posts: 8,577
Re: Detroit Diesel

Quote:
Originally Posted by Jrmcnabb9 View Post
Thanks for reply lepke.
I have removed and tested the oil cooler and hydro tested the head with injectors out to check injector cups. That was all good. She got hot about 2 yrs ago but didnít show signs of cracked head Then. It sat up for about 3 mo before it showed water in oil. Now Iím hoping head gasket kit. But I canít seam to get it off. On each end of the 471 there is hardly no tolerance Iím thinking itís rusted in but not sure I want to make sure thereís no bolt somewhere before I get to rough w it.
hope the pictures were before you removed head bolts.
I can see at least 2 that are still in the head . Should be a minimum of 10 bolts ( going from memory here can't find my torque specs book)
__________________
Non illigitamus carborundum
newhaul is offline   Reply With Quote
Old 10-10-2019, 06:25   #38
Registered User

Join Date: Oct 2019
Posts: 7
Re: Detroit Diesel

Yes pic was taking before I tore it down. I am going to play w it more this am. I’ll post a few more hopefully w the head off.

After sleeping on it The only thing I can think to look at is under the two lifting eye. I’m sure there’s nothing there but I may be able to spay some lube in that crack.
Jrmcnabb9 is offline   Reply With Quote
Old 10-10-2019, 06:54   #39
Registered User

Join Date: Oct 2019
Posts: 7
Re: Detroit Diesel - 4-53

Oh yea nice looks like it’s ready to get back to work. They were fit for battle that’s for sure. We have a bayou Chico here in la. Thought we were neighbors.
Jrmcnabb9 is offline   Reply With Quote
Old 10-10-2019, 07:34   #40
Moderator Emeritus
 
David M's Avatar

Cruisers Forum Supporter

Join Date: Sep 2007
Location: San Francisco Bay
Boat: research vessel
Posts: 10,393
Re: Detroit Diesel

They remind me so much of Seascouts back in the 70's. Almost all the boats back then had them....military surplus boats mostly. Many had never been rebuilt since they were manufactured in WW2. Military used them because of their reliabiliy. Modern Diesels now have wires, sensors and computers on them making them less reliable, but more efficient and quieter. Used to be that Diesels did not require 12VDC to keep running....to start, yes of course.
__________________
David

Life begins where land ends.
David M is offline   Reply With Quote
Old 10-10-2019, 07:52   #41
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Jacksonville/ out cruising
Boat: Island Packet 38
Posts: 31,131
Detroit Diesel

The DD was designed I believe in very much of a hurry, the drawn on a napkin type of design.
I believe it was designed to be modular in that many different engines could be built from the same parts, sort of a potato head engine, be easily built without expensive, fancy tooling, and be cheap to build, lightweight and compact, primary consideration was production rate, they wanted as many built as fast as possible.

On the lightweight and compact comment, remember it was 1939 and engines were huge and heavy, pressurized oil lubrication wasnít common, and that greatly limited engine output, aircraft had oil pumps but not many other engines.

It was never meant to last a long time, that sort of just happened,but that was common for the time, most WWII aircraft were designed to last 25 missions, no longer, but many are still around today. A theory was that designers werenít as smart as they are today and just couldnít design to a life limit, so in fear of something not being strong enough they overbuilt.

Ever wonder why the vast majority of surviving aircraft from that era are US built aircraft?
a64pilot is offline   Reply With Quote
Old 10-10-2019, 09:14   #42
Senior Cruiser
 
tkeithlu's Avatar

Cruisers Forum Supporter

Join Date: Feb 2012
Location: Carrabelle, Florida
Boat: Fiberglas shattering 44' steel trawler
Posts: 2,131
Re: Detroit Diesel

I run and maintain a surplus US Navy 4-53; love it, but you're right - fighting oil leaks is a way of life.

Idea for you. I keep two orginary wide blade wood chisels for this type of problem. They are sharp enough to get into those tiny gasket gaps, and tapped gently in at both ends will lift loose just about any glued down gasket.
__________________
Never let anything mechanical know that you are in a hurry.
tkeithlu is offline   Reply With Quote
Old 10-10-2019, 10:08   #43
Registered User

Join Date: Oct 2019
Posts: 7
Re: Detroit Diesel

The 471 head gasket consist of O ring and a parameter rubber gasket.i would hope there’s not Sealent in there but never know. I’m almost convinced that what is hanging this head from coming off is rust and crud on the sides of the head. There’s About a 2 sheets paper thin gap on front and rear of the head. I’m afraid the salt water is my enemy here. I have no history on this engine so no telling what Else I may find. Wish me luck
Jrmcnabb9 is offline   Reply With Quote
Old 10-10-2019, 17:13   #44
Senior Cruiser

Cruisers Forum Supporter

Join Date: May 2013
Location: Oregon to Alaska
Boat: Wheeler Shipyard 83' ex USCG
Posts: 2,834
Re: Detroit Diesel

If someone used sealer it can be like trying to split a 2x12. I've used steel wedges in the past on the really stuck heads, but carefully. The bottom of the head is smooth, no combustion chamber like a gas engine. You don't want scars on the surface. There are no hidden head bolts (studs).

The 71 series design started in the early 1930's when 2 one cylinder prototype engines were built. The smaller one became the 71 series and in 1938, 700 engines were built. The big prototype became submarine Winton engines. Neither were rushed in design because the war hadn't started. They were made to be long lasting engines, but in military service the 671 was run at 2800 rpm when the peacetime continuous rating was 1800. The 71s were made to be field rebuildable. Everything - blower, pumps, injectors were able to be rebuilt in primitive surroundings.

When I was a commercial fisherman, the 671 was the most common engine. Some were war surplus, still going in the 1970s and never overhauled. In the military they ran landing craft, generators, and Marine Sherman tanks. For some reason the army preferred gas engines in their Shermans. Some 671 powered Shermans were sent to the USSR and they copied the engine and manufactured a 671 copy into the 1950s. LCI (L), large infantry landing craft, were powered by 8 671s, 4 each on 2 shafts. Each engine group was known as quads. At the height of WWII production, 6000 671 engines were made each month. The 12v71s came in 1957 and that was the end of the quads.

Pic is Tongue Point, Astoria, Oregon - stored LCI (L) after WWII.









Attached Thumbnails
Click image for larger version

Name:	Tongue_point_ships.jpg
Views:	31
Size:	212.4 KB
ID:	201313  
Lepke is offline   Reply With Quote
Old 13-10-2019, 08:45   #45
Marine Service Provider
 
oldcal46skipper's Avatar

Join Date: Jan 2010
Location: Bayou Chico, FL 32507
Boat: Cal Cruising 46 - SATORI
Posts: 339
Re: Detroit Diesel - 4-53

Quote:
Originally Posted by Jrmcnabb9 View Post
Oh yea nice looks like itís ready to get back to work. They were fit for battle thatís for sure. We have a bayou Chico here in la. Thought we were neighbors.

Wow! I thought my Bayou Chico was the only one. N30 24 W 087 15
We are about half way between downtown Pensacola and Naval Air Station. After service in the USMC, then 30 years in SoCal we sailed away 1988 to 2002, cruising West coast of Mexico, Costa Rica & Panama. Then more roaming South America, Caribbean, east coast USA. We never found any place we liked better than Bayou Chico.


Don't want to de-rail the OP's thread. I still have that low hour DD 4-53 w/ BW Velvet Drive 3 to 1 Redux and PTO for pulling nets. I hope to roll it outside to my test area, run it,observing oil pressure, cooling etc. I will video tape and send to any interested persons.



I had two DD 3-53's that I sold to fishermen in Peru. Maybe I should get this one ready for South America
__________________

oldcal46skipper is online now   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Hi - New Member from Detroit Area jablgr Meets & Greets 5 23-10-2010 16:47
BMW diesel and black steel diesel fuel tanks johnpair Engines and Propulsion Systems 12 08-01-2009 15:30
diesel is diesel? Jack Long Engines and Propulsion Systems 12 03-09-2008 16:53
lower Detroit River gettinthere Great Lakes 6 10-07-2008 05:09
Detroit Help ep_sail Great Lakes 0 05-09-2007 00:41

Advertise Here


All times are GMT -7. The time now is 01:36.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.