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10-02-2022, 04:51 AM | #1 |
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Coolant Loss + Head Cover
Hello I'm new to this forum and I'm from Korea
My English might be bad but I'll try my best I'm new to this car and I think there's some problem with mine. it has just over 60K miles and after a week since I bought it coolant level low warning popped up so I bought a coolant and topped it off (it needed 2 Liters to full) and that was just a week ago and I checked my coolant level It went down to LOW level and it seems there is NO LEAK at all.. previous owner installed straight pipe exhaust so I can't tell by smell. and there is NO symptoms of burning coolant (white smoke, exhaust smells like sweet thingy) and engine oil level is not increasing. engine bay looks clean and no visual of coolant leaks in and out. previous owner said the valve cover gasket had been done a month or two. but not the head gaskets. I could fill another and drive off but it loses very quick. should I go to a mechanic and check it out? -------------------------------------------------------------- and for the head cover is that normal? there's a brown layer inside of a head cover. looks sketchy |
10-02-2022, 10:06 PM | #2 |
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Drives: 2011 M3 Coupe
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Maybe the coolant had been changed just before you picked up the car and the service people did not bleed the air out of the system? The air will slowly bleed out with regular use and leave you low. So you adding some and it going low again could be due to residual air still left in the system? I would keep an eye on it and if I had to add more I would then consider there to be an issue. If there are no leaks visible in the engine bay or on the floor, I think you're good👍🏼 That buildup in the valve covers is normal on med-high mileage motors. I have 24X,XXX miles and mine are gross too.
PS:Your English is great! Hats off to you for knowing multiple languages as well as writing in an unfamiliar language.
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10-03-2022, 02:00 AM | #3 |
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Welcome onboard Lowcam!
As Scrippy say, a leak "should" be visible. 2 liters seems a lot for bleeding though, and now you need to fill again... the only weird place (other than engine) I know of where coolant could dissapear is into the gearbox (if DCT) should the fluid/coolant heat exchanger of some strange reason be broken. Veeery long shot though. |
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10-03-2022, 05:13 AM | #4 | |
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previous owner said I should change coolant soon. so I assume that he didn't do coolant job. if there was air inside of cooling line then I'm worried about overheat. I redlined the car several times I'll add some more water(cuz I added only anti-freeze liquid) and check later on.. I hope it's not burning or mixed with oil inside the engine!!! and I didn't knew those buildups are normal! haha thanks for the advice! |
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10-03-2022, 05:20 AM | #5 | |
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Thank you! yes... leaks are not visible anywhere. under the car, where I parked, inside the engine bay! no white stains and so on... It's not at the very bottom but it's almost at LOW mark in the reservoir. it eat up more than 2 liter and I'm sooooo worried! and yes mine's a DCT! and if the heat exchanger is damaged, could it be visible leaks under the car? or the coolant can mixed with trans oil? I'm lost here T-T |
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10-03-2022, 10:55 AM | #6 | |
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The typical places for leaks is the tiny hose from the reservoir to the thermostat housing, or the tstat to engine sealing. I had a significant leak in the latter after replacing Tstat, coolant ending up in the engine V between the banks (possible to see with without removing the plenum). After 2 liter I like to believe it should show on the floor though, finding its way throught the V and down rear of the engine. Oil and coolant temperature OK? (there is a "secret" meny for coolant temp if you don't have a scanner). |
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10-03-2022, 11:39 PM | #7 | |
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still no visible leaks after parking 3 days oil temp seems fine it stays under 100C only gets slightly above 100C after hard driving I'll check coolant temp via secret menu thanks for all these info, tips! |
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10-04-2022, 10:21 AM | #8 |
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It typically leaks only when the engine is running, but yeah should still be some dripping also after parking. Did you check the engine V? With a flash light and a sneaky eye you get a fairly good view.
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10-04-2022, 11:34 PM | #9 | ||
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it doesn't go over 80C even if I drive it hard :/ and no visible leaks there too! |
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10-05-2022, 11:35 AM | #10 | |
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Cheers Edit: and engine/oil seem cool and nice after half hour driving. Last edited by Helmsman; 10-05-2022 at 01:00 PM.. |
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10-06-2022, 07:24 AM | #11 | ||
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I looked around more at the forum and I found that normal condition should get around 76C~82C all the time I've seen lowest temp around 64~68 when driving it never go up 76~78 while moving 70~74 was average when driving and it goes straight up to 88~90 when standing still! I think my TSTAT is stuck at half way open would that be normal too? I'll keep post what's going on! |
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10-06-2022, 11:57 AM | #12 | |
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10-07-2022, 10:25 PM | #13 | ||
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I thought the smell was coming from decatted exhaust but mechanic told me immediately there's alot of smell of burning coolant XD and yeah TSTAT were stuck half open but there was no stock for cooling tube at the moment so I'm going to replace all of them when they have it arrived. I'll have it repaired soon and post if that trans cooling tube fixed my problems! have a nice day |
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10-08-2022, 02:55 PM | #14 | |
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