My 2006 Tacoma 2.7 is burning antifreze

[Steve B]

I go thru a at every 100 miles and I know it is leaking into the piston and is exhausted thru the engine. Also I can smell the antifreeze when the heater is on. Any ideas? The Toyota dealer is going to work on it in a week.

 

[tacojoel]

Head gasket, cracked head, or block.

 

[JayQQ97]

does the crankcase oil look like milkshake?

 

[Rock62]

Has the truck overheated in its past??? This is typically a leading cause of head gasket failures.

The only symptom that is odd, regarding head gasket failure, is the anti-freeze smell with the heater on. Have you checked the coolant hoses that supply the heater core for leaks? Can you get into a position to inspect the heater core?

How do you know the ant-freeze is "leaking into the piston and is exhausted thru the engine."? What have you done for diagnostics?

I only ask these questions so you don't inadvertently lead Toyota to a head gasket repair when the problem could be elsewhere.

Suggest to just relate the symptoms to Toyota. Allow them to diagnose the cause and quote on a cure.

 

[tacojoel]

Just pressurize the coolant system, then wait, and watch.