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geekhack Community => Off Topic => Topic started by: tp4tissue on Mon, 02 December 2024, 12:00:49

Title: Warming up the Kha
Post by: tp4tissue on Mon, 02 December 2024, 12:00:49
Why is there no definitive stance on this? Warm up or no warm up?

It seems a large oversight given the sheer magnitude of humanity's dependence on Car use ?

How is it that something this basic is still wrapped in mythos and quackery.

(https://i.imgur.com/ZFDC6cx.gif)
Title: Re: Warming up the Kha
Post by: ivanh98 on Mon, 02 December 2024, 15:10:02
use car with preheat or remote start for warmup. i am fortunate to have such access
Title: Re: Warming up the Kha
Post by: tp4tissue on Tue, 03 December 2024, 17:56:44
The curfuddle is lack of definitive guidance by the manufacturer, you'd think they'd know.
Title: Re: Warming up the Kha
Post by: Leslieann on Wed, 04 December 2024, 03:36:51
I hate remote start.
Startup is the most likely time for something to go wrong and you're not there to catch it.

As for no warm up...
Yes manufacturers encourage no warm up, that's because of smog*, it has nothing to do with the car being okay with it. They do deal with it better than older engines (usually!), but it's still not actually good for it. Same with these CVT transmissions (constantly variable transmission), they're self destructing as you drive and rarely going over 100k miles. Regardless of what the manual says, change the fluid every 20k miles instead of 80k or lifetime and it will probably outlast the car, though I still wouldn't buy one.


* I know it's hard to imagine but manufacturers are quite okay with you replacing your car more often.
Title: Re: Warming up the Kha
Post by: tp4tissue on Wed, 04 December 2024, 08:42:22
Tp4 spoke with a motor oil warehouse manager recently, he basically echoed the same thing as LLann, he said 30k maximum before oil change, don't buy the expensive oil, it's the exact same thing as the cheapest oil, the middle-oil is just there because consumers think it might be better than the cheapest, when it's exactly the same thing + a <0.5% additive which more/less does nothing.
Title: Re: Warming up the Kha
Post by: TomahawkLabs on Wed, 04 December 2024, 10:35:42
As someone with an engine that lives and dies by its oiling (Subaru EJ255), I start my car and drive it very low RPM (sub 3k) until my oil is completely warmed up, then I drive it like a sports car. That is the only reason I can think of to let your car warm up.
Title: Re: Warming up the Kha
Post by: Leslieann on Wed, 04 December 2024, 20:35:57
Quote from: tp4tissue on Wed, 04 December 2024, 08:42:22
Tp4 spoke with a motor oil warehouse manager recently, he basically echoed the same thing as LLann, he said 30k maximum before oil change, don't buy the expensive oil, it's the exact same thing as the cheapest oil, the middle-oil is just there because consumers think it might be better than the cheapest, when it's exactly the same thing + a <0.5% additive which more/less does nothing.

Just to specify, 30k miles for CVT transmission, change your engine far more often.

Oh! and CHECK YOUR ENGINE OIL.
These cars that get 7-8k miles between oil changes are blowing up left and right not because they're bad but because no one checks their oil anymore. Toyota allows 1quart to burn off  every 1k miles, Hyundai allows 3 quarts every 1k miles before declaring an engine bad. Considering your pan only holds about 5 quarts and needs about 3 minimum to actually lubricate the engine, you can see the problem.
Title: Re: Warming up the Kha
Post by: Leslieann on Wed, 04 December 2024, 20:38:08
Quote from: TomahawkLabs on Wed, 04 December 2024, 10:35:42
As someone with an engine that lives and dies by its oiling (Subaru EJ255), I start my car and drive it very low RPM (sub 3k) until my oil is completely warmed up, then I drive it like a sports car. That is the only reason I can think of to let your car warm up.
You need to warm it up just so the head gasket and cooling system doesn't explode. (https://cdn.geekhack.org/Smileys/solosmileys/laugh.gif)
Title: Re: Warming up the Kha
Post by: TomahawkLabs on Thu, 05 December 2024, 08:05:07
Quote
You need to warm it up just so the head gasket and cooling system doesn't explode.
Show Image
(https://cdn.geekhack.org/Smileys/solosmileys/laugh.gif)


*knock on wood* I just did the timing belt and spark plugs. Not to mention replacing the steering rack, trans/motor mounts. Purrs like a kitty. I would hate to have to explain to my wife why it costs what it costs to rebuild an engine lol.
Title: Re: Warming up the Kha
Post by: Leslieann on Thu, 05 December 2024, 16:41:33
Quote from: TomahawkLabs on Thu, 05 December 2024, 08:05:07
Quote
You need to warm it up just so the head gasket and cooling system doesn't explode.
Show Image
(https://cdn.geekhack.org/Smileys/solosmileys/laugh.gif)


*knock on wood* I just did the timing belt and spark plugs. Not to mention replacing the steering rack, trans/motor mounts. Purrs like a kitty. I would hate to have to explain to my wife why it costs what it costs to rebuild an engine lol.

While good, that won't stop it.
Watch the tailpipe for steam, watch your cooling system catch tank for oil (dark brown) and watch your oil for coolant (milky). Catch it early enough and you "just" need new head gaskets and some miscellaneous parts. Not cheap but far cheaper than an engine rebuild. Oh, and if one goes, do both. I had one go, I fixed it and 6 months later (before I could get to it) the other let go, spun a rod bearing and destroyed the engine.

Turbo engines have MUCH better gaskets.
Title: Re: Warming up the Kha
Post by: TomahawkLabs on Thu, 05 December 2024, 16:57:03
Quote from: Leslieann on Thu, 05 December 2024, 16:41:33
Quote from: TomahawkLabs on Thu, 05 December 2024, 08:05:07
Quote
You need to warm it up just so the head gasket and cooling system doesn't explode.
Show Image
(https://cdn.geekhack.org/Smileys/solosmileys/laugh.gif)


*knock on wood* I just did the timing belt and spark plugs. Not to mention replacing the steering rack, trans/motor mounts. Purrs like a kitty. I would hate to have to explain to my wife why it costs what it costs to rebuild an engine lol.

While good, that won't stop it.
Watch the tailpipe for steam, watch your cooling system catch tank for oil (dark brown) and watch your oil for coolant (milky). Catch it early enough and you "just" need new head gaskets and some miscellaneous parts. Not cheap but far cheaper than an engine rebuild. Oh, and if one goes, do both. I had one go, I fixed it and 6 months later (before I could get to it) the other let go, spun a rod bearing and destroyed the engine.

Turbo engines have MUCH better gaskets.

2008 Legacy GT Spec.B. My favorite car that I hope I never have to get rid of.