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 Coolant VS Engine oil, Which 1 more significant?

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ktek
post Aug 13 2025, 12:45 AM

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QUOTE(fookhing @ Aug 12 2025, 01:57 PM)
Any people ever have leaking water from engines qnd various part after adding coolant? Is there truth that a system that had been using pipe water for too long will develop leaks after adding coolant? And the solution is to continue don't use coolant because it cause leaks?
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the small car i bought 2nd hand. ex owner proudly mention he using coway filter drinks. zero coolant
water will reduce every month or two. either boil off atau leaking.

QUOTE(littlefire @ Aug 12 2025, 02:33 PM)
No, the rust already built up before the coolant so is about any time to leak, even with or without coolant it will leak when the time comes. The best is to maintain coolant from day 1 and dont cheapskate.

Why some mechanic dont want to change, as a lot of owners think that after add coolant will solve the rust issue but in the end still got issue and blame the mechanic.
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replace due to acidic PH? official sc selalu insist to replace else void warranty.
ktek
post Aug 13 2025, 11:30 AM

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any different for water cooling system with radiator cap (majority i see 1.1bar)
or without radiator cap (no idea pressure spec. haynes book write 1,4bar)
ktek
post Aug 13 2025, 01:14 PM

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so ngam i was trying enjin oils until found a satisfy one last week.

various brand, various grade of full syn /semi syn even monograde make water temperature raise above 95'c then enjin die off.
altho can restart back, pedal become sluggish & whole bonnet macam oven.
ex-owner told me the water temp will stay between 75-85'c in aircond max mode during summer hot. i rasa it made radiator fan run high speed la.

now using 10w40, water temp stay below 100'c aircond off
never die off, never heat like oven. radiator fan run when needed only

 

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