Radiator overflow boiling over and heater not generating heat

Asked by Oct 20, 2016 at 01:29 PM about the 2006 Lexus GS 300 RWD

Question type: Maintenance & Repair

The CAr is not overheating, but after commuite it was boiling over and the heater is not generating heat. Replaced radiator cap.. yet still no heat through heater. Not sure if it will over boil yet?

1 Answer

89,035

I suspect a blown headgasket and the combustion gasses are accumulating in the heater core forcing the coolant out of the core itself thus causing an air pocket and you boiling condition. A block check test will tell the tale.

Your Answer

Add photo

Related Questions

Search Lexus GS 300 Questions

Lexus GS 300 Experts

#1 Tom Demyan
Tom Demyan
Reputation 350
#2 juniorsheld
juniorsheld
Reputation 200
#3 kbro
kbro
Reputation 160
View All

Related Models For Sale

Used Lexus GS 350
124 Great Deals out of 4,203 listings starting at $6,500
Used Lexus ES 350
262 Great Deals out of 14,608 listings starting at $4,786
Used Lexus GS 430
5 Great Deals out of 99 listings starting at $3,800
Used Lexus IS 250
200 Great Deals out of 5,282 listings starting at $5,499
Used Lexus LS 460
93 Great Deals out of 2,671 listings starting at $8,995
Used Lexus LS 430
50 Great Deals out of 919 listings starting at $2,500
Used Lexus IS 300
14 Great Deals out of 2,188 listings starting at $2,995
Used Honda Accord
699 Great Deals out of 83,202 listings starting at $500
Used Lexus IS 350
70 Great Deals out of 1,514 listings starting at $6,800
Used Acura TL
270 Great Deals out of 7,125 listings starting at $1,999
Used Toyota Camry
852 Great Deals out of 90,788 listings starting at $1,200
Used INFINITI G35
90 Great Deals out of 3,313 listings starting at $1,200
Used BMW 3 Series
1,071 Great Deals out of 34,811 listings starting at $900
Used Nissan Maxima
278 Great Deals out of 26,070 listings starting at $2,300

Used Cars For Sale

2006 Lexus GS 300 RWD For Sale
12 Great Deals out of 208 listings starting at $5,800