# Overheating '91 Nissan 240SX **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [May 10, 2011, 5:10pm UTC](https://community.cartalk.com/t/overheating-91-nissan-240sx/64565 "2011-05-10T17:10:38Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![jozarb](https://avatars.discourse-cdn.com/v4/letter/j/d2c977/32.png) [@jozarb](https://community.cartalk.com/u/jozarb)\ **Post date:** [May 10, 2011, 5:10pm UTC](https://community.cartalk.com/t/overheating-91-nissan-240sx/64565/1 "2011-05-10T17:10:38Z")
My 1991 Nissan 240SX (only 85K miles!) has an intermittent overheating problem that began last November. Needle usually right in middle, but occasionally would quickly rise to danger zone. In Nov., I got new radiator and pump, as well as all new spark plugs. Was OK for about 3 months, then started overheating occasionally. In shop a day and a half while they tried to find the cause. Gave me a new thermostat. Then test showed there was a leak in head gasket. Instead of expensive repairs, I put 8-oz bottle of K-Seal in cooling system. Reviews all over the web gave me confidence it would seal all leaks. But within 5 minutes, it overheated. Tried again later, same result. ---
**Author:** ![the\_same\_mountainbike](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@the\_same\_mountainbike](https://community.cartalk.com/u/the_same_mountainbike)\ **Post date:** [May 10, 2011, 5:18pm UTC](https://community.cartalk.com/t/overheating-91-nissan-240sx/64565/2 "2011-05-10T17:18:28Z")
You already know the next step. Sincere best. ---
**Author:** ![chaissos](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/chaissos/32/2347_2.png) [@chaissos](https://community.cartalk.com/u/chaissos)\ **Post date:** [May 10, 2011, 6:46pm UTC](https://community.cartalk.com/t/overheating-91-nissan-240sx/64565/3 "2011-05-10T18:46:42Z")
TSMB: /concur.