Water Pump - Toyota Land Cruiser 70 & 80 Series HDJ81, HZJ81, PZJ7x, HZJ7x - w/1PZ, 1HZ, 1HDT & 1HDFT engines - 16100-19235 Japan

Water Pump - Toyota Land Cruiser 70 & 80 Series HDJ81, HZJ81, PZJ70, PZJ77, HZJ70, HZJ73, HZJ77 & other models - with the 1PZ, 1HZ, 1HDT or 1HDFT engines.

This is a very high quality water pump with a metal impeller (the factory pump uses a plastic impeller).

Pro Tips: We recommend that you replace your water pump with each timing component (belt kit) replacement. The factory recommended interval for the belt and tensioner is 5 years/100,000Kms. In my experience with these engines, water pump reliability starts to drop off considerably in the 140,000 Km range - some last longer, some don't even last that long.

A note about water pump installation and water pump belts:
• Using the proper Japanese belts and using the factory specified belt tension is critical for proper water pump lifespan.
• The number 1 reason why these types of water pumps fail prematurely is from excessive belt tension.
* Do not over tension the belts. If your belts are noisy, squealing, or whatever, the belts should be replaced with new Japanese belts rather than using excessive tension to get them to stop being noisy. And do not use belt dressing to quieten belts, that stuff is basically "snake oil".

Water pump life is affected by factors such as coolant concentration and quality, belt tension, operating environment and engine hours. Replacing the pump at the same time you're doing the timing belt and components saves on duplicated labour as well. Use the Toyota factory service specifications when adjusting belt tension. 

Coolant concentration in the cooling system should be at no less than 50% coolant, and 50% distilled water. We suggest using a 60/40 concentration since when an engine is flushed with clear water to remove the old coolant, otherwise water that is left behind from flushing may reduce the effective concentration to below 50/50.

Coolant not only prevents overheating, it also provides lubrication for the water pump and has corrosion inhibitors in it to reduce internal engine corrosion and electrolysis as well as premature gasket failures (where gaskets are exposed to coolant -such as the cylinder head gasket).

Also, replace your rad cap at the same time... it's cheap insurance against overheating. You would not believe the number of original rad caps I have seen that are still on Land Cruisers from the 1970s and 1980s... that have long since stopped operating properly. An old, weak rad cap is the number 1 most common cause of overheating.

Toyota pn:
16100-19235

NPW - Japan

2022 01 13
2025 06 11 minor updates, added notes about belts and belt tension
8413.30
1,850
1610019235

water pump 1hz, water pump 1hd-t 1hd-ft 1hd-fte