help with this engine id

Discussion forum for the venerable 510, and its non-US counterparts, the Datsun 1600 and Bluebird.
cobiansan
Posts: 3
Joined: Tue Dec 18, 2018 12:34 pm
Car: datsun 1969

help with this engine id

Postby cobiansan » Wed Dec 19, 2018 11:08 am

Hi, i recently bought a 1969 datsun, I´m starting to restore it, but checking the posts related to engine identification I noticed that my engine id does not match with the common identification for this year, it does'nt start with A, J, L or any other common character for datsun engine.

is there some help with this issue?

my engine id has a "M6W" mark and also has a lined M on engine's block, driver side =M=


Thanks for your support

LJCobian


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AZhitman
Administrator
Posts: 69618
Joined: Mon Apr 29, 2002 2:04 am
Car: 72 240Z RB25, 63 Bluebird RHD, 63 NL320, 67 WRL411, 67 SPL311, 68 510 SR, 73 240Z, 77 620 SR20, 89 Pao, 98 S14, 12 Titan CC 4x4.
Location: Surprise, Arizona
Contact:

Re: help with this engine id

Postby AZhitman » Thu Dec 20, 2018 10:09 pm

Post up a pic of the engine - I'm glad to help ID it.

Also, your engine ID is on the P side, near the front of the engine, just below the head.

FWIW, I have a '68 510 I've restomodded, so I'm eager to see what you got!

cobiansan
Posts: 3
Joined: Tue Dec 18, 2018 12:34 pm
Car: datsun 1969

Re: help with this engine id.... Thanks AZhitman

Postby cobiansan » Sun Dec 23, 2018 3:41 pm

Thanks AZhitman, there are some pics of the engine, the car has a lot of details, but I'll do my best to bring it to good shape, I'll share some pics later

https://photos.app.goo.gl/i2QQWoqayu91ZtbH7

https://photos.app.goo.gl/i2QQWoqayu91ZtbH7

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AZhitman
Administrator
Posts: 69618
Joined: Mon Apr 29, 2002 2:04 am
Car: 72 240Z RB25, 63 Bluebird RHD, 63 NL320, 67 WRL411, 67 SPL311, 68 510 SR, 73 240Z, 77 620 SR20, 89 Pao, 98 S14, 12 Titan CC 4x4.
Location: Surprise, Arizona
Contact:

Re: help with this engine id

Postby AZhitman » Sun Dec 23, 2018 10:33 pm

OK. So, let's start with this: That's not the stock engine.

Your '69 510 should have had a L16 (1600cc). The stamped steel valve cover looks a lot like the early E and A-series engines, but it doesn;t match those either.

Looks like an early H-series (forklift) engine, based on the placement of the t-stat.

Now, what's stumping me is the Datsun valve cover (which wouldn't have been on a forklift motor) and the lack of a breather tube.

Dammit. OK, I'll be working on this for a while. Hold please. :)

User avatar
AZhitman
Administrator
Posts: 69618
Joined: Mon Apr 29, 2002 2:04 am
Car: 72 240Z RB25, 63 Bluebird RHD, 63 NL320, 67 WRL411, 67 SPL311, 68 510 SR, 73 240Z, 77 620 SR20, 89 Pao, 98 S14, 12 Titan CC 4x4.
Location: Surprise, Arizona
Contact:

Re: help with this engine id

Postby AZhitman » Sun Dec 23, 2018 11:01 pm

LJ, a quick consult with a good friend and I've got an answer for ya.

Here's his reply: "Its a Mexican J motor. It will be either 1600 or 1800 depending on where it originally came from. Mine has the same "M" casting on the block. It is the logo used by Nissan indicating cast in Mexico. The 1800 or J18 I have is cast M8Y where the normal engine code stamping would go. Not sure why the deviation from standard, but this also had a Borg Warner "top loader" 4 speed and a Dana 30 with 4.56 gears factory installed when assembled in Mexico."


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