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Datsun 521 L20B


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#41 Crashtd420

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Posted 08 August 2017 - 06:22 PM

So quick thing... you set the valve lash at .05 ? ... that's really loose...
I think its around .008- .012, ... maybe you ment. 005? Which is a little tight....
Why do you say the motor is no good.... probably just the head that needs some work....

#42 wayno

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Posted 08 August 2017 - 06:48 PM

I had cylinder number 4 intake valve doing that, even the exhaust did it once in that cylinder, for me it was old gas, once I put new fuel in it it quit doing that, sticky valve.


 

 

 


#43 Donedreamin

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Posted 08 August 2017 - 08:42 PM

So is the collar that the release bearing is on also from the 620?

 
The fork is the 521 and the bearing is the 620, thinking this may cause me some issues?



#44 Donedreamin

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Posted 08 August 2017 - 08:45 PM

So quick thing... you set the valve lash at .05 ? ... that's really loose...
I think its around .008- .012, ... maybe you ment. 005? Which is a little tight....
Why do you say the motor is no good.... probably just the head that needs some work....

So initially I reset the valve spring rocker seat and then verified the gap hot between 0.012 and 0.010 can't recall off the top of my head which is intake and exhaust. I started it up and within 20 seconds it popped off again so I made the gap smaller thinking it may rectify it and it popped again. 

I do have access to some motors that are in a farmers field still in vehicles, I need to pull the transmission apart anyways. I've never pulled the head on these motors and not sure what the easiest and cheapest route would be, what would you do?



#45 flatcat19

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Posted 08 August 2017 - 08:50 PM

Easiest head removal....wedge the chain.


https://www.amazon.c...hain wedge tool

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


#46 wayno

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Posted 08 August 2017 - 10:18 PM

 
The fork is the 521 and the bearing is the 620, thinking this may cause me some issues?

The bearing doesn't matter, what matters is what collar the bearing is on, you should be using the 620 collar, if you used the 521 fork and collar, that will be an issue.

You see the collar and the clutch cover/pressure plate are a matched set, the transmission doesn't matter, to be less confusing, you should also have used the 620 fork/collar and put the new release bearing on that collar.

Collars are different heights depending on which flywheel/clutch cover you are using, if you have a 200mm flywheel/clutch cover you use the tallest collar, if you have a 225mm flywheel/clutch cover then it is the medium height collar, and the 240mm flywheel/clutch cover use the short collar.

What happens sometimes is that the wrong collar gets used and either the transmission seems hard to install, or it drops right in and the slave push rod is too short, generally most don't mess up and use the 521 collar, they use the medium collar on their 5 speed swap even though they have a 200mm flywheel, they cannot push the clutch in far enough to totally disengage the clutch.


 

 

 


#47 Crashtd420

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Posted 09 August 2017 - 02:14 AM

I had cylinder number 4 intake valve doing that, even the exhaust did it once in that cylinder, for me it was old gas, once I put new fuel in it it quit doing that, sticky valve.


Maybe one of those fuel treatments to try to clean off the valves ....
You could even try something like seafoam before your next oil change .... cleans out the inside of the motor.... like Wayno said maybe sticky valve...
I'm not a fan of additives like that shit people put in a radiator to "seal it"...
But I know people who use the seafoam and rave about it.....

#48 Crashtd420

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Posted 09 August 2017 - 02:15 AM

Worth a try over pulling the head....

#49 Donedreamin

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Posted 11 October 2017 - 08:12 AM

Had a coupled days at home, took advantage by pulling an L20 out of a farmers Datsun collection. 

Anyone need 620 wagon parts?

 

 

36966637983_5f331513cf_c.jpg

 

Here are some photos I snapped during this years tour, building relationships :D

 

37605491552_4898661311_c.jpg

 

37605486962_89eb304864_c.jpg

 

36927173784_d82b493670_c.jpg



#50 wayno

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Posted 11 October 2017 - 09:17 AM

You have a photo of this 620 wagon?

Is it RHD?


 

 

 


#51 d.p

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Posted 11 October 2017 - 09:59 AM

Had a coupled days at home, took advantage by pulling an L20 out of a farmers Datsun collection. 

Anyone need 620 wagon parts?

 

 

36966637983_5f331513cf_c.jpg

 

Here are some photos I snapped during this years tour, building relationships :D

 

 

 

 

 

 

 

 

Great picture right there. 



#52 Donedreamin

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Posted 11 October 2017 - 10:00 AM

I do not. There are 3 LHD 620 wagons, 1 510 wagon and a few 620 trucks as well. They are in rougher shape but they are complete.



#53 wayno

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Posted 11 October 2017 - 10:29 AM

There really is no such thing as a 620 wagon, some folks over in Japan made a couple of them but Datsun/Nissan never made them as far as I know.

There is such a thing as a 610 wagon, lots of them were shipped/imported here.


 

 

 


#54 Donedreamin

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Posted 11 October 2017 - 11:40 AM

There really is no such thing as a 620 wagon, some folks over in Japan made a couple of them but Datsun/Nissan never made them as far as I know.

There is such a thing as a 610 wagon, lots of them were shipped/imported here.

 

 

My mistake, I did some research and they are 710 wagons



#55 datzenmike

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Posted 11 October 2017 - 04:10 PM

36966637983_5f331513cf_c.jpg
 
This the yard on the south side of the Trans Canada near the Alta border?
 
 
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#56 datzenmike

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Posted 13 October 2017 - 07:22 PM

36966637983_5f331513cf_c.jpg

 

The pale yellow car sure looks like a 610 with the corner marker lights missing. The blue one behind it sure looks like a 610 grill


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