do88 Silicone Coolant Hose Kit – BMW 135i / 1M / 335i (E8x / E9x, N54)

OVERVIEW

The rubber coolant hoses on N54 cars are now well past their best, and a cracked hose on a twin-turbo engine can quickly turn into an overheating problem. The do88 kit replaces the factory radiator, coolant pipe, water pump, thermostat, bleed, heater and automatic-transmission cooler hoses with reinforced silicone.

Each hose has three to five layers of reinforcement depending on diameter. The factory quick-connect fittings are reused: cut off the old crimp clamps and fit them to the new hoses with regular hose clamps. For cars without the auxiliary parking heater.

SPECS

• Silicone construction with 3 to 5 reinforcement layers depending on diameter
• Black finish
• Reuses the OE quick-connect fittings
• Replaces OE upper/lower radiator hoses (17127540127, 17127564480), coolant pipe hoses, bleed hoses, water pump hose (11537545665), thermostat hose (11537541992), heater hoses and automatic transmission cooler hoses

PARTS INCLUDED

• do88 silicone coolant hose kit (black)

TECH RESOURCES

• Required extras: the matching do88 hose clamp kit for kit 222 (sold separately) and BMW-approved coolant to refill and bleed. Not for cars with the auxiliary parking heater.
• Installation notes: drain the coolant, remove each OE hose, cut the original crimp clamps with a hacksaw to free the OE fittings, and mount them in the silicone hoses with regular hose clamps. Refill and bleed per BMW procedure.
• Price is for the item only; labor is not included.

PART NUMBER

• do88-kit222B — do88 Coolant Hoses, BMW 135i / 335i N54 (black)

VEHICLE APPLICATIONS