Fuel Pump Options

Since I got the truck I’ve been trying to figure out a replacement mechanical fuel pump. Previously I mentioned one of the possibilities, which was to get a newer fuel pump for a more common L-series Datsun engine and modify it to fit the E-series engine.
Here is a picture of the original, OEM fuel pump that came on the E-1 engines, complete with tin-man styling and a cool priming lever (picture originally posted on Ratsun by Steve).

And here is a shot of the Nikki fuel pump that was on my truck when I got it. I am fairly certain this is a J-series engine fuel pump such as those found on the engines of the 520 and 521 trucks that followed the 320 in the Datsun line-up beginning in late 1965. Note the angle and length of the fuel pump arm are similar to the original E-series pump above.

I found and bought an L-series fuel pump. This is the pump that was found on 510s, 240zs, and 610 and later Datsun trucks, so they tend to be more readily available than either the E-series or J-series pumps. As shown below, the mounting surface and bolt-hole spacing between the J- and L-series pumps are identical, which is promising.

But clearly the arms are different in size and angle (L-series pump left, J-series right).

And the L-series pump is a Kyosan Denki whereas the J-series is a Nikki.

The fuel pump arms are mounted into the body by a pin. I was unsuccessful trying to press out the pin on either of the pumps, so I will need to take this to a machine shop to see if they have any luck swapping the arm from my E-1 compatible J13 pump onto the brand new L-series fuel pump.

British Engine Gaskets

In addition to the J13 Engine Gasket Set I ordered, I also ordered some gaskets from Moss Motors for the British B-series engine, found on the MGA and MGBs. Early Datsuns were produced with a licensed version of the B-series engine and the E-1 has that lineage, so many of the British engine parts cross over to the E-series engines.

I ordered two lines of valve cover gaskets from Moss, the first made of cork and the second a more durable silicone. The J13 valve cover gasket shown below at the top of both pictures is the one with the holes for the valve cover mounting screws, which is how the J13 and later (1964-65) 320s fixed their valve covers to the head. The earlier 320 valve covers did not have these six screws and were mounted by two large bolts through the top of the valve cover. The cork version is Moss Motors part #296-310 and was about $2. The red silicone version was part #296-311 and was $17.

The side cover/inspection cover gaskets that came with the J13 gasket set were made of cork. The same silicone valve cover gasket shown above from Moss also comes in a kit with a pair of red silicone inspection cover gaskets for less than $20 for all three pieces, part #296-425. Here are some shots of the J13 inspection cover gaskets compared to the B-series silicone versions.

Furthermore, Moss sells a very nice, U.S.-made exhaust manifold gasket that is a perfect match for the E-1 engine. Part #297-535 was $9. Compare to the J13 version below.

J13 Engine Gasket Set

I ordered a full J13 engine gasket set from RockAuto and it arrived this week.  The 1.3 liter J13 engine came in the later 520 and 521 trucks and 411 cars from 1965-1969, but I expect that many/most of the gaskets will fit the E-1 engine. The set is Victor Reinz part #HS3597.
Here is a shot of the gasket set and its contents:

Below I will inventory the gaskets included for posterity.
Valve stem seals:

Valve cover and inspection cover gaskets:

Combination intake/exhaust manifold gasket (note that it is a perfect fit for the E-1 manifolds):

Carburetor insulator block

Note that the J13 insulator (right) has a single large oval-shaped opening to match the J13 intake whereas the E-1 intake manifold and insulator (left) has two separate circular openings:

There were the two intake/exhaust manifold gaskets. The slightly larger one is the hot spot gasket that mounts on top of the exhaust manifold and mates to the underside of the intake manifold (same gasket shown in both pics below).

Water pump gasket:

Fuel pump gaskets (two, one goes on either side of the fuel pump spacer, not included in this kit). These gaskets are also available separately, Beck/Arnley part #039-2008. Likewise, the fuel pump spacer is Beck/Arnley part #039-2002.

Thermostat tower gasket (also Beck/Arnley part #039-0004):

And, importantly here is the J13 head gasket:

New Filters!

Last week I ordered some replacement air, fuel, and oil filters from Rockauto. I was pretty pleased to find the filters still available. These are from Fram, which aren’t known as the best filters in the world, but frankly are probably as good or better than the ones that came on the truck in the mid-1960s. Plus I got a rebate!

The air filter is part # CA352.

The fuel filter is part #G3359.

The oil filter cartridge is part #CH820PL.

There is also a WIX oil filter cartridge available that is part #51300.

Water Pump Removal/New Water Pump

The last thing I did today was to remove the water pump.  I plan to replace the water pump with a new one because fortunately, new aftermarket water pumps are available for the E1 engine from Gates, part #42324.

The water pump on my truck, which is cast iron and I believe the original OEM water pump, only has one large outlet for the lower radiator hose. This set-up requires an in-line fitting to connect this plumbing to a long, smaller hose running from the top of the heater core.

However, the Gates pump, which is a later design perhaps for the J13 engine, has an integrated second, smaller outlet, to connect the heater hose.  The Gates pump has the threading for the outlet, but does not come with a hose fitting, so I procured one (Moroso part #65390) and used an 18mm socket to thread it into the pump.  The correct fitting for this pump and the hose is a 1/2″ barbed hose fitting with a 3/8″ Male NPT fitting.

Here’s a shot of the nice new Gates water pump ready to be installed.

I removed the old water pump from the engine. The water pump is attached to the block by three long bolts. I used a 1/2″ socket to remove those bolts.

With the three bolts removed, the water pump pulled off easily.

Inside the block there was some coolant, but it didn’t look like too much rust, mud, or other crud, which is a good sign.

Here is a side-by-side comparison of the two water pumps that highlights the location of the second water outlet on the new one.

Old school chrome oil filler cap

Today the new valve cover oil filler cap I ordered from Nissan arrived in the mailbox.  The one on the truck is very plain and I wanted to get one of the cool chrome ones I’ve seen that have the classic Japanese characters.

So I did some research to find the right part.  The part number for the E-1 engine oil filler originally was 15265-30800 but Nissan lists that part as NLA (no longer available).  So I know a lot of these parts crossover from similar Datsun vehicles of the time.  I had a hunch that the 1500 roadster may share the oil filler cap with the 320 truck.  Luckily, several years ago I ordered a similar old chrome cap for the roadster I’m restoring, which is a 1968 2000, and I happen to know that that cap also fits the 1600 roadsters (same part number).  I couldn’t find a part number for the 1500 filler cap, but I dug up the cap I bought for my 2000 from my roadster parts stash and lo and behold it fit the E-1 valve cover nicely.  Sweet.

So I ordered a new one from Nissan and it arrived today.  The part number is 15255-B3430.  List price is $12.60 but I got it from nissanparts.cc, which is the online parts department for Bruce Titus Nissan in Olympia, WA, for $9.78 plus shipping.  
Should be a nice touch of JDM nostalgia on the valve cover.

Fuel pump?

Part of my plan is to replace the fuel pump.  Unfortunately, the 320’s E-1 engine fuel pump is no longer available from Nissan and as far as I can tell, not really available in the aftermarket anymore either.  I did some research and found that the J-series fuel pumps should fit the E-series motor in the 320s, but haven’t been able to chase down one of those yet either.  I’m pretty sure the fuel pump on my engine now is a J-series engine pump.

I’d really rather stick with a mechanical fuel pump if at all possible.  Rebuilding is an option, but I haven’t had any luck finding a rebuild kit.  They are probably out there.

Mike Klotz, in a couple of posts on the Ratsun forums, discovered that the four cylinder Datsun L-series engine, found in 510s and the later 521 trucks has the exact same footprint as the 320 and 520 fuel pump.  Since those vehicles are much more common than the 320 trucks the aftermarket parts support should be considerably higher.  However, the L-series fuel pump is not a direct swap for the J-series, as the arm on the L-pump is much longer than the J-pump.  Mike’s idea was to transplant the arm from the J-pump over to the new L-pump and install the new one.  It should work and is something I plan to attempt if I can’t find a new J-series pump.

Here’s the fuel pump on my truck.  It is a Nikki brand pump but I don’t believe it is the original OEM pump that came on the truck based on its appearance, but a later-style J-series engine fuel pump.

New Cooling System Parts

This morning I ordered some new radiator hoses and other cooling system parts for the truck.  I got a new radiator cap while I was at it.  I ordered some thermostats and gaskets.  All of those parts were listed for a Datsun 520 but should fit the 320.  I was pleasantly surprised to find a water pump and fan drive explicitly listed for the 320 at RockAuto and ordered those also.

Here are the part numbers, including the model of Datsun truck that those parts were listed under.  I ordered most of it from rockauto but did get a couple of parts from Amazon where the total cost including shipping (which was free from Amazon) was lower.

Part Name Part Number Price (each)
Upper Radiator Hose Goodyear 60998 (520) $4.68 Wholesaler Closeout from Rockauto
Lower Radiator Hose Goodyear 60794 (520) $16.06 from Amazon
Radiator Cap Gates 31527 (520) $8.12 from Amazon
Thermostat Beck/Arnley 143-0685 (520) $6.66 from Rockauto
Thermostat Housing Gasket Beck/Arnley 039-0036 (520) $.22 Wholesaler Closeout from Rockauto
Water Pump Gates 42324 (320) $20.79 from Rockauto
Fan Belt Goodyear 15356 (320) $3.38 from Rockauto

Clutch Hydraulics parts

Today I also ordered the parts to replace the clutch master and slave cylinders.

Here’s a summary of the parts I ordered along with what model Datsun truck they were listed for.

Part Name Part Number Price (each)
Master Cylinder Beck/Arnley 072-1084 (521) $39.06 from Amazon
Slave Cylinder B/A 072-1241 (521) $23.42 from Amazon

Brake Parts

Today I ordered a bunch of parts to replace the hydraulics and do a full brake job on all four corners.  The 320 trucks have drum brakes, front and rear.  I didn’t try Nissan, other than for the brake adjusters, which are NLA (no longer available), and couldn’t find the 320 listed in many parts books.  However, the parts for a 1965 Datsun 520 truck and/or a 1969 521 truck fit.  It is my understanding that the 1960s trucks shared a lot of parts and the fittings are all SAE until the 620 trucks, which are metric.

I actually bought a Haynes manual for a 1968-1973 Datsun 510 and PL521 truck and confirmed that the specs and dimensions of the 521 brake components are identical to those of the 320. The drums are the same size as are the shoes and the master cylinder seems to have the same bore.

Here’s a summary of the parts I ordered along with what model Datsun truck they were listed for.

Part Name Part Number Price (each)
Master Cylinder Beck/Arnley 072-2660 (521) $28.95 from Amazon
Front Wheel Cylinders (2) B/A 072-1936 (521) $21.66 from Amazon
Rear Wheel Cylinders (2) B/A 072-2561 (521) $22.25 from Amazon
Brake Drums (4) B/A 080-0307 (520) $8.40 from Amazon on Closeout
Front Brake Shoes B/A 081-0150 (520) $25.64 from Amazon
Rear Brake Shoes B/A 081-0168 (520) $6.63 from Amazon on Closeout
Brake Adjusters LEFT side (2) B/A 085-0024 (520) $3.41 from RockAuto on Closeout
Brake Adjusters RIGHT side (2) B/A 085-0032 (520) $8.73 from RockAuto on Closeout
Front Brake Hoses (2) B/A 073-1188 (520) $15.04 from Amazon
Rear Brake Hose B/A 073-0259 (520) $16.63 from Amazon
Front Brake Hardware Kit B/A 084-1121 (521) $9.64 from Amazon
Rear Brake Hardware Kit Centric 118.42002 (320) $8.70 from RockAuto

I looked up the parts on both RockAuto.com and Amazon.com to get the best price, including shipping, which can be pretty expensive on heavier parts like these. Amazon offers free shipping on orders over $25 which is why I ended up buying many parts from them.

In addition to the Beck Arnley drums I ordered, I verified from the Centric catalog that Centric part #122.42005 is a fit for the 1964-65 320 trucks and also is listed for the 521 trucks, and even for the 720 trucks produced through mid-year 1981.