2004 corolla (1ZZ-FE) block heater

Scott Gibson wrote in article ...

I think you might want to put your tools down, put your hands in your pockets where they can do no harm, and back away from the car slowly.....

Then, call the dealer and make an appointment to have the block heater installed.......correctly. You will probably save time and money in the long run.

The "hole" for which you are looking is non-existent at this point.

You "create" the hole by removing a core plug or threaded plug.

The block heater heats the coolant, and you must install the block heater so the heating element is immersed in the coolant.

You usually do this by removing a plug that opens up into the water jacket in the block.

If your cooling system had an existing "hole" in it, all your coolant would run out......

If you are seeking a simpler installation, you might want to consider a radiator hose heater with which you simply cut open the radiator hose (after draining the system, of course), slip the heater in series with the hose then tighten two hose clamps.

Any sort of cooling system heater is going to require you to at least drain the system, refill and - in some cases - bleed the system.

Bob Paulin - R.A.C.E. Race Car Chassis Setup & Dial-in Services

From the instructions provided it indicated there was no plug or threaded or otherwise. The block heater is a cartidge with a spring clip. To the best of my knoledge it does not physicaly come in contact with the coolant. I say this because there is no way the spring clip could cause it to be water tight.

Also the technician from the dealer that I spoke with indicated there is hole exists in the block and is not covered.

Scott Gibson wrote in article ...

slowly.....

If it simply clamps externally to the side of the block, you might be better off with a hose heater that actually heats the coolant.