DIY repair · Toyota Land Cruiser 80 Series

Replace the 'PHH' (pesky heater hose)

DIFFICULTY 2 / 5TIME ≈ 1–2 hoursCOST About $20 in generic hose and clamps; bypass kits about $45

Symptoms

A coolant leak low on the driver's side of the engine, or an original-looking hose clamp on a high-mileage truck. Members warn a failure on the trail can leave you completely stranded, which is why many replace it before it fails.

The fix, step by step

  1. The PHH is a short hose, roughly 3 inches long, low on the block.
  2. It joins the hard pipe that runs from the heater valve, behind the EGR, to the block near cylinders 5 and 6, and is easiest to see from the driver's front wheel well.
  3. Drain some coolant, work the old hose off, fit the new one with good clamps, refill and bleed.
  4. Replace the nearby bypass hose, just above and forward of it, at the same time.

Tools & part numbers

  • Basic hand tools
  • hose pick
  • coolant
  • new hose (owners report using Gates heater hose) and clamps; aftermarket bypass kits are also available.

Where to buy the parts

Heater hose (1995 Land Cruiser 4.5L)RockAuto ↗Amazon ↗
Coolant / antifreeze for the top-up (1995 4.5L)RockAuto ↗Amazon ↗

Hunting a used or discontinued part? Search eBay Motors for Toyota Land Cruiser 80 Series parts →

Before you start

Rated for a competent home mechanic with a decent tool kit. Confirm torque figures, fluids and procedures against the factory service manual for your VIN, support the truck on stands rather than a jack, and work at your own risk (disclaimer). Some parts links are affiliate links, which pay us a small commission at no cost to you.

The Boxy Dispatch · monthly

One new guide, one featured rig, one recall worth knowing. Monthly, no spam.

Subscribe and get a free printable inspection checklist for any truck we cover.