cardkey98 Posted June 14, 2013 Report Share Posted June 14, 2013 I found a truck in a farmers field and went to talk to him about what he wanted to sell it for. He told me that he parked the truck there in 2000 and its been sitting there ever since. He also said when he parked it that it was burning oil like mad and he would be grateful if i just took the truck off his property. So i took it home and after unloading it i put a battery in it spayed carburetor cleaner into it and gave it a crank and BOOM it fired (You got to hand it to the Japanese when it comes to build quality). The truck burns oil real bad. I pulled the motor to rebuild it but there is just so many signs that this may not the original motor I am hoping to get some help identifying the motor before i purchase the rebuid kit. The truck is a 1979 Datsun 620 king cab The block has U95, 89152, and M2 stamped on the block. The head has an w53 stamp on it. The plate on the fender says l20b. It has an aftermarket 2.5-4psi electric fuel pump and a plate where a mechanical one should be. Also is that the correct fuel pressure. I would appreciate any and all advice Quote Link to comment
datsunaholic Posted June 14, 2013 Report Share Posted June 14, 2013 You noted almost everything EXCEPT the ID numbers. See the 2 rectangular rusty spots behind the dipstick? The engine model and serial number will be engraved or stamped there. W53 head is a L16/L18 head, but that doesn't mean the block is. I have a W53 on an L20B, but that's because I put it there. Quote Link to comment
cardkey98 Posted June 14, 2013 Author Report Share Posted June 14, 2013 L20B - 376481 Those are the numbers. Quote Link to comment
Tristin Posted June 14, 2013 Report Share Posted June 14, 2013 L20b is the important part. It may not be the exact engine that came with the truck from the factory, but thats whats suppose to be in it. You have an L20 block with a W53 head. Quote Link to comment
datsunaholic Posted June 14, 2013 Report Share Posted June 14, 2013 Actually, now that I think of it the W53 does mean you'll need a gasket set for a 75-77 L20B. The exhaust manifold gasket will be different than the original, due to port shapes. The stock W58 head had round ports, the W53 should be square (but weird round W53s, which I think were welded up squareports, exist). Quote Link to comment
nessa357 Posted March 27 Report Share Posted March 27 My 1971 Datsun truck motor has a number stamped on it 2305B what motor is it Quote Link to comment
datzenmike Posted March 27 Report Share Posted March 27 Should be an L series 1.6 liter AKA L16. Look just below the head at top edge of block on the raised boss behind the dip stick. May need wire brush. Quote Link to comment
nessa357 Posted March 27 Report Share Posted March 27 That was the only numbers I found. I can't look it up anywhere. Quote Link to comment
Crashtd420 Posted March 27 Report Share Posted March 27 3 minutes ago, nessa357 said: That was the only numbers I found. I can't look it up anywhere. Those are possible serial numbers if the B is actually an 8.... Are they in the location Mike mentioned? 1 Quote Link to comment
nessa357 Posted March 27 Report Share Posted March 27 I found it thank u. Z22 250640 Quote Link to comment
nessa357 Posted March 27 Report Share Posted March 27 My next question. What year is it. That is confusing to me. So this motor is a z22 right Quote Link to comment
datzenmike Posted March 27 Report Share Posted March 27 The Z22 is stamped on the opposite side under the exhaust. Is this where you found it??? The Z22 was used in the '81-'82 720 truck and the '82-'83 S110 200sx Quote Link to comment
nessa357 Posted March 27 Report Share Posted March 27 I found it close to the dipstick stamped on the motor :). Quote Link to comment
datzenmike Posted March 27 Report Share Posted March 27 Yes the Z22 dipstick is on the left side. The chassis number and the engine block numbers aren't the same. The 720 truck Z22s had carburetors, the S110 200sx had EFI. I would assume that this is a 720 engine if ordering parts. Quote Link to comment
datzenmike Posted March 27 Report Share Posted March 27 Is the carburetor on the passenger side? Quote Link to comment
nessa357 Posted March 27 Report Share Posted March 27 It is on the driver's side I found it close to the dipstick stamped on the motor :). Quote Link to comment
Stoffregen Motorsports Posted March 27 Report Share Posted March 27 Carb on driver side, and just above the exhaust? Sounds like a LZ combo. Pretty common actually. 1 Quote Link to comment
datzenmike Posted March 27 Report Share Posted March 27 It's a Z22 block with an earlier L series head on it. Making it a hybrid combination. The head ID is cast into the bottom of the head between the first and second spark plug. Probably a U67, maybe a W58 or an A87. 2 Quote Link to comment
Stoffregen Motorsports Posted March 27 Report Share Posted March 27 6 hours ago, nessa357 said: Thank u To clarify, it was not a factory setup. The L head has been installed on a Z motor, so when ordering certain parts, it's crucial to know what is what. Ordering parts for the bottom end - Z22 out of a 720. Aside from the front cover and possibly the entire accessory drive system, which could be from just about any L or Z, depending. Ordering parts for the head, carb, exhaust, it can be different based on round or rectangular exhaust ports, what intake and carb, linkage style, etc. Quote Link to comment
nessa357 Posted March 28 Report Share Posted March 28 Yeah it's been difficult finding parts! The numbers I found on the motor by the dipstick was Z22 250640 1 Quote Link to comment
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.