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What Is L16, L18, & L20 Clutch Disk Diameter ??


difrangia

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What is the outside diameter of the clutch disk friction surface for the L16, L18, Nd L20 series engines?

 

Additionally, what is the diameter and spline count of the input shaft on these engines?

 

I realize that there may or may not be a difference in sizes for the different displacements.

 

Thanks in advance.

 

Steve

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they all could be either 200 or 225 you have to measure yours to know for sure. We are right at this moment running a 225 clutch on a 1600  in my sons 1980 720... I think ^_^

The clutch disc i have tried on the junk out back will fit a 70 4speed all the way up to at least a D21 Ka transmission.

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l16 and l18 are 200 mm  and most l20s are 225 mm i would assume they measure the disk dia but i am not positive.

the input shaft i just measured is right at 25 mm and 24 splines

On that trany with the 25mm diameter input, could I get you to measure the outside diameter of the sleeve that surrounds the input shaft? This is the area that the throwout bearing sleeve slides on. This is helping me a lot in putting this puzzle together. Thanks.

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Thanks to all here. These replies add a little more to my project, in particular the TO bearing charts. My little project is one of those 'none of the above' instances. If you've seen some of my other posts, I'm changing our 320 over from column shift to floor shift with the upcoming engine rebuild. I'm using the correct period transmission out of a 65 320. So far my research tells that this is a trany that was only used for a few years in the 65 320 pickup, the first year & a half of 520 and a couple years in the 410 Bluebird. Finding parts and anyone with 'been inside there' knowledge for these 50 year old machines is a hit & miss, mostly miss prospect.

 

I've acquired a new correct clutch disk and a TO sleeve that is not correct for my application. In this thread I was looking for the clearance between the TO sleeve bore inside diameter and the outside diameter of the trany front plate/throwout guide that the sleeve slides on. I'm coming to the conclusion that the clearance is about 1mm (.040). I have been advertising for a throwout sleeve and some of the other parts that I'm lacking with some success.

 

 I can machine a sleeve if I can find one to develop a drawing from or acquire some key dimensions from. The Ratsun people have helped me more than I can begin to say. Parts and knowledge is virtually non-existant here in the center of the country and the west coast appears to have done a good service in preserving so much of  ingriguing Datsun automotive history and hardware. There were a fair number of Datsuns around here starting in the mid-sixties and even a dealer in this little town of 20K people. They got used up and recycled around here. Almost everyone either had one or knows someone who had one and have only positive memories of the cars & trucks.

 

I’ve ranted a bit long here. Time to go out and slay some dragons.

 

Steve

 

320FloorTrany3_zps6dfedfe5.jpg

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unknown002.jpg

 

Steve I know of this transmission that has column or floor shift. The one above looks like the cover over the input is snapped off? Can you post yours? I checked my 71B and the collar to shaft clearance was much closer than I thought. A mm would be close if you machine one. The other collars have a small cavity inside that is packed with grease.

 

Also, your pressure plate has coil springs? not a diaphragm style?

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Mike, this is view inside my clutch area on my trany. The rubber vent insert is just laying in the bottom of the housing.

 

320FloorTrany5_zps70e6fc7b.jpg

 

Input shaft is 7/8" diameter with 20 splines. The 520 pickup with the bottom pan trany that was incorporated in, I believe, Sept 66 had 1" diameter X 24 spline input. When I do the math, it appears that I have the throwout sleeve for the larger input shaft as I have about .165 difference between the TO sleeve and the trany snout. Allowing 1/8" (.125) for the difference in the trany input shafts diameters, the clearance should be about .040 or 4.1mm. So My TO sleeve is for the 1" input shaft on some vehicle. Looks like this:

 

TOSleeveClearance_zps750218a1.jpg

 

I do see the groove in the TO sleeve bore for a little lube retention both in the posted size charts and in the sleeve that I have. My pickup is still running but not for long. She's getting ready to burp up her power unit. The photo that you posted could be a column shifter as they don't have the guide snout on the front plate. the throwout bearing is captured to the clutch fork with two wire clips that keep it centered Kinda like an older VW Bug.. I know this from photos acquired from a 320 friend in Kansas.

 

Steve

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unknown002.jpg

 

Steve I know of this transmission that has column or floor shift. The one above looks like the cover over the input is snapped off? Can you post yours? I checked my 71B and the collar to shaft clearance was much closer than I thought. A mm would be close if you machine one. The other collars have a small cavity inside that is packed with grease.

 

Also, your pressure plate has coil springs? not a diaphragm style?

 

Looking at this photo again, I'm thinking that you are right that it's probably a floor shifter with the snout broke off. The clutch forks look like it uses a throwout sleeve and it is for the starter with an integral solenoid. I believe that most, if not all, column shifters would have a hole in the back of the starter cavity with a metal cup screwed on the backside of the trany housing and use the starter with solenoid mounted on right fenderwell. Starter would have the long shaft with inertia/spiral gear kick-in.

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Yeah that snout is definitely gone. I broke a 71B off once by hammering on it to 'break' the cover plate loose. The correct way is to strike the pivot ball through the shift lever hole.

 

That picture is from this transmission...

unknown001Large.jpg

 

 

I also have this one, probably a column shift? But no hole in the starter.

NL320002.jpg

 

NL320001.jpg

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  • 1 year later...

Dead thread resurrection.....

 

But I have a 65 320 with floor shift. I CANT FIND A CLUTCH SLAVE!!!

 

No other models fit, and I desperately need one.

 

Anyone know something I can use or where I can find one??

 

Thanks!

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