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Matt, Mechanical Engineer
Category: Toyota
Satisfied Customers: 20808
Experience:  BEng hons Mech engineering, in auto industry 22 years
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i have a toyota lucida ,ive just fitted brand new head,head

Customer Question

Hi i have a toyota lucida ,ive just fitted brand new head,head gasket,waterpump,radiator ,now the promblem is i can hear water running through the heater matrix on acceleration...besides this car runs fine ,no overheating and interior heater works as it should ,ive tried bleeding and flushing system and its fine for 20 mins and then the sound of gushing water comes back......should i probably change matrix ?
Submitted: 1 year ago.
Category: Toyota
Expert:  Shantal-Mod replied 1 year ago.
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Expert:  Matt replied 1 year ago.

the moving water sounds may not be coolant moving about, its well worth checking the condition of the scuttle panel drain pipes

if you look under the car there's a couple of rubber pipes either side of the transmisson tunnel - try using a thin metal rod to remove and clogs
Customer: replied 1 year ago.

toyota lucidas dont have a scuttle panel to drain off water ,furthermore the sound completely goes when heater switch is positioned to cold

Expert:  Matt replied 1 year ago.

thanks for the extra information

in that case I'd agree that air must be being drawn into the system

Check all the rubber hoses for any signs of leaking and tighten up clips as required and before replacing the mattrix I'd try a bottle of this

as its very good at sealing small leaks without clogging the galleries up
Customer: replied 1 year ago.

thanx will try some first thing in morning ,will let u know in evening how it goes.

Expert:  Matt replied 1 year ago.
Expert:  Matt replied 1 year ago.
do you still need help with this?
Customer: replied 1 year ago.

tried k.seal n now after a long drive i loose heating when car is left idling which it didnt do b4.

Expert:  Matt replied 1 year ago.

OK are you still losign coolant?
Customer: replied 1 year ago.

no like i said new head,headgasket,radiator,water pump,and expantion tank bottle and coolant never moves and temp gauge sits where it should even when i drive it at 90 mph on motorway the car doesnt overheat at and after that drive i can open water bottle immediately and no bubbles in water either.

Expert:  Matt replied 1 year ago.

OK in that case the matrix must be drawing in air and have 1 or 2 tiny holes

Sorry to say it sounds like the matrix will have to be replaced

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