How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Tim's Auto Repair Your Own Question
Tim's Auto Repair
Tim's Auto Repair, Mechanic
Category: Car
Satisfied Customers: 16029
Experience:  Have owned a repair shop for 25 yrs.
Type Your Car Question Here...
Tim's Auto Repair is online now
A new question is answered every 9 seconds

2002 Olds Alero: 3400 V6 that..blowing..head gaskets..water pump

This answer was rated:

I have a 2002 Olds Alero with 3400 V6 that is blowing water out the overflow when the temperature reaches about normal. This overheats when driving. We have replaced the head gaskets, shaved the heads, replaced the water pump and thermostat. Any ideas?


have you replaced the radiator/reservoir cap?

Customer: replied 7 years ago.
Yes, the cap has been replaced. Also, there is not water in oil or oil in water.
have you bled the colling system?
Customer: replied 7 years ago.
Yes, the cooling system has been bled and cleared of air pockets. boils out the water before it overheats....right?explain
Customer: replied 7 years ago.
The water begins bubbling out, like there is pressure inside, but the temperature has to get just a little above normal before it will start bubbling.


replace the radiator/reservoir cap again.....if it is building up enough pressure to do this..the problem is still in the heads...maybe the machine shop has missed a small crack..sorry,,but if it isn't the will need to come apart again


Customer: replied 7 years ago.
We have tried another set of heads that did the same thing, but we did not have them worked before putting them on the car. Could 2 sets of heads do the same thing?


yes..all it takes is getting hot one time.....take your first heads and get them checked,and shaved ..install new head gaskets and it should be ok


Tim's Auto Repair and 8 other Car Specialists are ready to help you
Customer: replied 7 years ago.
Just wanted to let you know, I think we have finally solved this problem by replacing the reservoir. We attempted to have the coolant system pressure-checked and the mechanic could not get a good pressure. After replacing the reservoir and bleeding the air from the system, it seems to be working correctly now. Thank you for your help.


thanks for using justanswer