Re: IML: 413 block leak

There may be a crack between the two freeze plug openings that opens up as the block expands when it heats up. There could also have been a gas bubble in the block when it was cast, compromising the thickness of the water jacket that has now rusted through. Those two scenarios could be repaired with an arc-welder. If the coolant is only leaking to the outside of the engine, depending on the rate, vigilance in keeping the coolant level up along with careful attention to any changes in the rate it's leaking, might be the most economical solution.

Roy

67 Crown FDHT

In a message dated 3/10/2005 6:27:47 PM Pacific Standard Time, s.l.scheuermann@xxxxxxxxxxxxxxxx writes:

The block leak is located between 2 freeze plugs on the driver's side. It looks as if a previous owner tried to replace one without removing the engine...its a bit bent. However both mechanics that have looked at it say the freeze plug is not the problem. Perhaps it is time for a 3rd opinion!

If it is cracked it really is not noticable as the second mechanic swears that it is not cracked and that the coolant is seeping thru pores in the block... The sealants that were tried were both internal to the cooling system. I seem to remember that one was called ceramic seal.