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Engine Tech Technical discussion related to all relevant engines such as KA, SR, RB, CA, 2JZ , L24/26/28, VG, VQ, and LSx series. |
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10-05-2023, 09:09 PM | #1 |
Join Date: Aug 2020
Location: Lancaster CA
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S13 KA24de daily driver Coolant and heater hose replacement How often?
I live in Southern California and was wondering how often I should replace both my coolant and heater hoses. The ones on my car now are around 7 to 8 yrs. Also, are ISR and HPS silicone hoses any good? Thanks for your replies.
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10-06-2023, 12:55 PM | #2 |
Leaky Injector
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i have ISR coolant hoses and have done about 500 miles on them with no issues. i don't see why they wouldn't last at least as long as new OEM ones. simple parts.
if your hoses are visibly cracking or leaking, then i would obviously say replace them. i would take them off and check the inside for any debris buildup if anything, but 7-8 years doesn't seem too long.
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10-06-2023, 08:44 PM | #3 |
Zilvia Member
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I've had HPS hoses on my car for about 3 years/25,000~ miles and they've been fine.
I will say the fitment isn't ideal: Upper hose rubs right against the stock intake tube And to fit the lower hose, I had to remove and cap off the small airbox/resonator that connects underneath the intake tube And the experience from my recent endeavors, I highly recommend changing out ALL the 30 year old rubber on these cars
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10-07-2023, 04:03 AM | #4 |
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Thank you both very much. You were very helpful. DEGUZZI are you running an after market fan with your radiator? I have a Mishimoto setup and it keeps draining my battery every 18 months.
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10-07-2023, 08:16 AM | #5 |
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I still have the clutch fan
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10-10-2023, 07:21 AM | #6 |
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I'm almost certain all the coolant hoses other than the radiator hoses I pulled off my '93 in 2018 at 320,000 miles were original, none of them had failed but none of them survived removal, haha.
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10-10-2023, 08:08 AM | #7 |
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I have a bone stock '92 that I putt around in from time to time, and every rubber component is original. Not that I'm proud of it, and I'd be lying if I said I don't have an assortment of hoses/clamps/fittings from previous engine partouts I've done lying in the trunk at all times, but I digress.
Point being, while not a prudent habit, the rubber components can be trusted for a long ass time, so long as there aren't any unnatural forces like abrasion acting on them. Silicone stuff probably lives forever, idk. |
10-10-2023, 01:08 PM | #8 |
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Silicone is interesting in coolant hose applications - it has a higher burst pressure but it's also very slightly porous and can lose coolant over time. I actually don't know how it would perform in terms of longevity in a street car versus rubber. Though I know Ford and GM used silicone radiator hoses in cop cars.
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