Jump to content


Photo

My new 521


  • Please log in to reply
353 replies to this topic

#1 Datsunthug

Datsunthug

    Advanced Member

  • Members
  • PipPipPip
  • 245 posts
  • Location:Nevada city ca
  • Cars:72 Datsun 521

Posted 20 February 2016 - 10:13 AM

4711AF9F-D45A-4ABD-8573-6ADF889F164A_zps

#2 Datsunthug

Datsunthug

    Advanced Member

  • Members
  • PipPipPip
  • 245 posts
  • Location:Nevada city ca
  • Cars:72 Datsun 521

Posted 20 February 2016 - 10:16 AM

E3A12CAE-42C8-45E3-AC7C-585F08741A5C_zps

#3 Datsunthug

Datsunthug

    Advanced Member

  • Members
  • PipPipPip
  • 245 posts
  • Location:Nevada city ca
  • Cars:72 Datsun 521

Posted 20 February 2016 - 10:20 AM

I picked this up for free last week. Really clean '72! It runs and everything works, but unfortunately needs rings to keep it from puffing like a locomotive. I'm excited to see its progress.
Already replaced the rotting fuel lines and put in s new battery. Love Datsuns!!

#4 DanielC

DanielC

    Senior Member

  • Senior Member
  • PipPipPipPipPip
  • 4,412 posts
  • Location:West Linn,Or

Posted 20 February 2016 - 10:29 AM

Looks like a nice 521!   I know a lot about 521 trucks I have had them since I was in high school. I graduated in 1973.

 

Reach under the front fenders with a hose.  Flush dirt out by the door, dirt collected there causes rust out in the lower fenders.  Spray water up and over the headlight buckets, at the front, dirt als get up there also.

 

How are the floors in your truck?

 

You can edit your own posts on Ratsun any time.  No need to start multiple threads on the same truck.

 

Clicking on my name gives you an option to search for my posts.   You will find a lot of 521 information in my posts, and threads.

 

By the way, the body of a 521 uses American (SAE) sized parts, and thread pitches.  The engine, transmission and rear axle is metric.  Bolts in the drive line are SAE.  SAE fasteners are also commonly called fine thread. 



#5 Datsunthug

Datsunthug

    Advanced Member

  • Members
  • PipPipPip
  • 245 posts
  • Location:Nevada city ca
  • Cars:72 Datsun 521

Posted 20 February 2016 - 10:36 AM

The floors are pretty good. Only a couple small pin holes. Tailgate has a few pin holes from it sitting with the gate down. It's totally complete. Just a little tired. Need to find a motor rebuild kit or maybe throw in a 300 zx motor and tranny :)

#6 Datsunthug

Datsunthug

    Advanced Member

  • Members
  • PipPipPip
  • 245 posts
  • Location:Nevada city ca
  • Cars:72 Datsun 521

Posted 20 February 2016 - 10:42 AM

First thing I did was cleaning out the years of dirt and pine needles. $7 at the local car wash. Pressure washed it at home. It's now in my garage for motivation and preservation.
Thsnks for the info on the fasteners. Wasn't aware they did that

#7 DanielC

DanielC

    Senior Member

  • Senior Member
  • PipPipPipPipPip
  • 4,412 posts
  • Location:West Linn,Or

Posted 20 February 2016 - 10:46 AM

This truck, http://community.rat...gon-datsun-521/had "OK" floors, I cleaned them up, put epoxy primer on them, PPG DPLF, then used fiberglass, with marine epoxy from Tap Plastics for resin.

 

I would suggest getting a L-20-B engine.  It is a bolt in swap.  You can also rebuild,or obtain a better L-16, or L-18.  The L-20-B engine is a little taller than the L-16, and may require slight modifications to the exhaust pipe.

The L-16 engine likes to rev up.  7,000 Redline.  6,500 yellow zone.  Perfectly happy doing 4,000 on the freeway at 60 MPH.  5 grand all day long.



#8 banzai510(hainz)

banzai510(hainz)

    L motor God

  • Senior Member
  • PipPipPipPipPipPipPipPipPipPip
  • 14,509 posts

Posted 20 February 2016 - 10:47 AM

OH Dude I go the same truck I just painted the rims white

maybe lower it if you like and just leave it as is

 

go to olddatsuns.com read the tech section and save it. Lots of infor


Throw on some Weber sidedrafts, Rising Sun hood.... call it good

#9 flatcat19

flatcat19

    Back in Black

  • Senior Member
  • PipPipPipPipPipPipPipPipPipPip
  • 18,263 posts
  • Location:Tri-Cities, WA/PDX
  • Cars:Smaller. Better. Slower. Lower.

Posted 20 February 2016 - 11:00 AM


Clean. Nice.

Same color as mine. Looks great.

You can't hang if your nuts haven't dropped...it's physics


#10 Suplexilicious

Suplexilicious

    Member

  • Members
  • PipPip
  • 62 posts
  • Location:Salt Lake
  • Cars:'71 521

Posted 20 February 2016 - 12:08 PM

Very clean and you can't beat the price.

 

Congrats!



#11 datson4life

datson4life

    Datsun Mechanic

  • Senior Member
  • PipPipPipPipPip
  • 3,093 posts
  • Location:Modesto, CA
  • Cars:1972 Datsun ka running 521 and 1972 datsun ka non running 521

Posted 20 February 2016 - 01:06 PM

Nice! Congrats

#12 wayno

wayno

    Datsunahaulic

  • Senior Member
  • PipPipPipPipPipPipPipPipPipPip
  • 11,707 posts

Posted 20 February 2016 - 02:16 PM

Nice score  :thumbup:

 

I would agree Daniel about the L20b, it was the most useful upgrade I ever made to my 1971 Datsun 521 truck.

To give you an example, with the L16 I could not follow my friends up a logging road in first gear, as they had low range and all I had was first gear, the L16 didn't have the torque to follow them that slow, so I would have to wait on a flat spot till they were out of sight, then I could rev it up and haul ass up the road and make it to the top, after I put the L20b in the truck, I could follow them up the hill in 2nd gear without any problem, I could go up a hill in 2nd gear that the L16 would not even go up in 1st gear.

The L20b is a great upgrade, a 5 speed is also pretty nice also, as you don't have to listen to the engine screaming down the hiway in 4th.

There are a lot up decent upgrades for the 521, but at first I would just go with the L20b as it is a bolt in.


 

 

 


#13 Datsunthug

Datsunthug

    Advanced Member

  • Members
  • PipPipPip
  • 245 posts
  • Location:Nevada city ca
  • Cars:72 Datsun 521

Posted 20 February 2016 - 04:40 PM

Anyone have a L20b for sale? I'd like to get this going down the road without the James Bond smoke screen.

#14 DanielC

DanielC

    Senior Member

  • Senior Member
  • PipPipPipPipPip
  • 4,412 posts
  • Location:West Linn,Or

Posted 20 February 2016 - 05:00 PM

Check the classified ads. 

Check local junk yards where you live.  L-20-B engine were used in 620 trucks, Later model 510's (also known as a Datsun A-10).

The L-20-B can be easily identified by double bolts at the top of the timing chain cover.  You can easily see the double bolts near the base of the distributor, between the two fan blades

L20Bolt.jpg



#15 4perrev

4perrev

    Senior Member

  • Senior Member
  • PipPipPipPip
  • 820 posts
  • Location:San Juan Islands, WA
  • Cars:1972 Datsun 521, 1972 2 Door 510, 1971 4 Door 510 & some Euro cars.

Posted 20 February 2016 - 09:03 PM

Sweet truck man and better price! Who are your friends or neighbors? Cause I'd love to meet em and score a free truck!! :thumbup:  L20's are a dime a dozen at the pick-n-pulls. Just have to look out for them. Welcome to the house! Scour the threads and pinned items for good stuff and ideas. I rebuilt my L16 all the way through for about $250.00, including the oil!!


If it eats gas and blood type is measured by weight, it's good by me!

 

1972 521 Resto http://community.ratsun.net/topic/52247-my-first-datsun-resto-1972-521/page-1

1972 510 Resto http://community.ratsun.net/topic/62863-the-dime-finally-realized/

 

WW_zpsymynqorv.gif


#16 Datsunthug

Datsunthug

    Advanced Member

  • Members
  • PipPipPip
  • 245 posts
  • Location:Nevada city ca
  • Cars:72 Datsun 521

Posted 21 February 2016 - 09:42 AM

thanks everyone im glad I joined. The info is appreciated. Can't wait to get this going and head out to a local meet

#17 Datsunthug

Datsunthug

    Advanced Member

  • Members
  • PipPipPip
  • 245 posts
  • Location:Nevada city ca
  • Cars:72 Datsun 521

Posted 22 February 2016 - 10:46 PM

Compression test showed
30,90,120,125
1086DFE4-3308-4015-B87F-C196FF13B708_zps

#18 flatcat19

flatcat19

    Back in Black

  • Senior Member
  • PipPipPipPipPipPipPipPipPipPip
  • 18,263 posts
  • Location:Tri-Cities, WA/PDX
  • Cars:Smaller. Better. Slower. Lower.

Posted 22 February 2016 - 10:49 PM

Put a couple drops of oil in the spark plug holes and do the testing again.


If it goes up, rings.
If it stays the same your not sealing because of head gasket or valves.

Cylinder pressure balance would be your next line of testing if a wet compression test doesn't give you anything.

You can't hang if your nuts haven't dropped...it's physics


#19 DanielC

DanielC

    Senior Member

  • Senior Member
  • PipPipPipPipPip
  • 4,412 posts
  • Location:West Linn,Or

Posted 22 February 2016 - 10:50 PM

Minimum compression on a L-16 is 159.

If the compression was close to 159, I would do other more specific tests, but that far off, other tests are just confirming what you already know.



#20 banzai510(hainz)

banzai510(hainz)

    L motor God

  • Senior Member
  • PipPipPipPipPipPipPipPipPipPip
  • 14,509 posts

Posted 23 February 2016 - 06:31 AM

I think its around 140 mine was back in the day.

 

adjust the valves first.

 

if seems torun fine , fuck it just drive it till you buy spare stuff and build a motor on the side.

Most L motor stuff one can get nearly free.


Throw on some Weber sidedrafts, Rising Sun hood.... call it good