Thread: Why So Slow at Warming Up?

Hehe true, but the Maxima is still faster then my car haha

Did you add water wetter to your system? That could cause very slow warmup in winter weather.

i guess im with everyone else here too, as with the rr b15, i start it up, and go maybe 5-6 blocks and its warmed up already lol.

my parents cars on the other hand, 05 corrolla, 06 mazda 6 and toyota sienna take ages to warm up it seems.

maybe its a rr thing

Nope, I bought a can, but I've been avoiding using it, I've been driving without radiator fans and water temp has still been under 200*F so no need for it yet hehe.



Weird because the RR has the least amount of friction, less friction = less heat haha.

Wonder if it's the head design?

My DET takes forever to heat up... The KA24E in my truck heats up fast. I think alot of that is due to the iron block which holds heat better.

Wow. good call. I wondered why my B13 took a little longer to warm up. I've been using water wetter ever since I got the car and I love the stuff, never thought it could affect warm up time. U learn something new everyday, eh?

Yep, some people add a full bottle of Water Wetter to their B13 or B14. This is great in the summer but awwful in the winter!!
Our cars can only handle 1/2 bottle of Water Wetter in the system for Winter heat.

I also made this same mistake and FROZE during winter driving. Removed all of my coolant and refilled with the 60/40 antifreeze mixture & only 1/2 bottle of water wetter. Now, the car runs cool in summer and I have heat in the winter.

Vad, When you purchased the thermostat, did you get the lower degree thermostat? I made that mistake too. I had to eventully replace the cooler thermostat with a standard OEM thermostat (IIRC 170deg).

My car really won't heat up while driving. Not with the temps in the 30's anyway. If I let it sit and idle for a while it'll heat up, but if I drive for a while it'll cool back down lol. Been that way for years with a few different thermostats.

Different Problem.
Your recirculating vent is probably stuck open. If you close it, you should get heat.
But if your recirculating lever is broken (like most are), simply remove the locking pin from the rod connection (under the dash above the gas pedal), push the flap door closed manually & Tape it down with DUCK TAPE to hold it closed.

If that dont work, then you probably have a blocked-up Heater Core. This requires a trip to the junkyard and removal of your dash to replace. Sometime, getting a Professional System Coolant Flush will free it up but not likely with the green Prestone antifreeze buildup as it gets very hard inside the core and is difficult to breakdown. If you ever changed a water pump, you may have noticed the hard stuff built-up inside along the fins... Its much easier & cheaper to replace the heater core with another one, clean out the new core by running water thru it (with your garden hose turned all the way up & spray nozzle on Jet setting), reinstalling and refilling the coolant system with a 60/40 mix of the non-corrosive antifreeze of your choice (Yellow stuff: Peak, Zerex G-05, etc). Your radiator & water pump will also benefit & also will last much longer from the Green Preston the antifreeze change..

Recirculating lever is fine. I don't think the core is stopped up either since it does actually warm up when sitting. BTW I'm talking about actual engine temp not whether or not the heater works. With that being said obviously the heater works fine when the engine is warm lol.

When driving my car at regular speeds, with the fan off, and temps in the 30's my temp gauge stays at the bottom.