# collapsing rad hoses **URL:** \ **Category:** SON240sx Automotive\ **Created:** [July 12, 2010, 6:02am UTC](https://forums.speedlife.net/t/collapsing-rad-hoses/157725 "2010-07-12T06:02:44Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![joe\_S13-1991](https://avatars.discourse-cdn.com/v4/letter/j/8c91f0/32.png) [@joe\_S13-1991](https://forums.speedlife.net/u/joe_S13-1991)\ **Post date:** [July 12, 2010, 6:02am UTC](https://forums.speedlife.net/t/collapsing-rad-hoses/157725/1 "2010-07-12T06:02:44Z")
i have an s13 with a j-spec ka24de im having some problems with my rad hoses, they keep collapsing at first it was upper which i replaced with a spring inside but now its my lower hose that goes to the thermostat i made sure my line was clear from my coolant resovoir to the rad so its not that. any ideas what the problem would be ? please and thanks guys the help is greatly appreciated 🙂 ---
**Author:** ![KA24Power](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/ka24power/32/5595_2.png) [@KA24Power](https://forums.speedlife.net/u/KA24Power)\ **Post date:** [July 12, 2010, 8:41am UTC](https://forums.speedlife.net/t/collapsing-rad-hoses/157725/2 "2010-07-12T08:41:49Z")
Try a new rad cap ---
**Author:** ![joe\_S13-1991](https://avatars.discourse-cdn.com/v4/letter/j/8c91f0/32.png) [@joe\_S13-1991](https://forums.speedlife.net/u/joe_S13-1991)\ **Post date:** [July 12, 2010, 8:46am UTC](https://forums.speedlife.net/t/collapsing-rad-hoses/157725/3 "2010-07-12T08:46:39Z")
got a new one last month ---
**Author:** ![joe\_S13-1991](https://avatars.discourse-cdn.com/v4/letter/j/8c91f0/32.png) [@joe\_S13-1991](https://forums.speedlife.net/u/joe_S13-1991)\ **Post date:** [July 12, 2010, 12:22pm UTC](https://forums.speedlife.net/t/collapsing-rad-hoses/157725/4 "2010-07-12T12:22:09Z")
also found a greasy substance on the bottom of my rad cap what could leak into my rad to do that ? ---
**Author:** ![DJPyro](https://avatars.discourse-cdn.com/v4/letter/d/278dde/32.png) [@DJPyro](https://forums.speedlife.net/u/DJPyro)\ **Post date:** [July 12, 2010, 3:00pm UTC](https://forums.speedlife.net/t/collapsing-rad-hoses/157725/5 "2010-07-12T15:00:03Z")
Oil. Headgasket? Do an oil change and pay attention to the first little bit that comes out. Check your oil cap for milky residue. Do a leakdown test. ---
**Author:** ![R33](https://avatars.discourse-cdn.com/v4/letter/r/5f8ce5/32.png) [@R33](https://forums.speedlife.net/u/R33)\ **Post date:** [July 12, 2010, 9:17pm UTC](https://forums.speedlife.net/t/collapsing-rad-hoses/157725/6 "2010-07-12T21:17:50Z")
do a compression test on that jspec ka ---
**Author:** ![roast](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/roast/32/5498_2.png) [@roast](https://forums.speedlife.net/u/roast)\ **Post date:** [July 13, 2010, 12:24pm UTC](https://forums.speedlife.net/t/collapsing-rad-hoses/157725/7 "2010-07-13T12:24:44Z")
Replace the lower hose as well. ---
**Author:** ![DJPyro](https://avatars.discourse-cdn.com/v4/letter/d/278dde/32.png) [@DJPyro](https://forums.speedlife.net/u/DJPyro)\ **Post date:** [July 13, 2010, 2:33pm UTC](https://forums.speedlife.net/t/collapsing-rad-hoses/157725/8 "2010-07-13T14:33:46Z")
^ While that’s worth doing, a shitty rad hose won’t just collapse because it’s shitty. ---
**Author:** ![joe\_S13-1991](https://avatars.discourse-cdn.com/v4/letter/j/8c91f0/32.png) [@joe\_S13-1991](https://forums.speedlife.net/u/joe_S13-1991)\ **Post date:** [July 13, 2010, 2:36pm UTC](https://forums.speedlife.net/t/collapsing-rad-hoses/157725/9 "2010-07-13T14:36:20Z")
im lost i opened my rad cap and released the pressure in the lower hose that goes to the thermostat, then i drove it today and kept it more in the range of 2,500 - 3,000 rpm and it kept my stock temperature guage normal,as well my hose didnt collapse today :S but when i was keeping my rpms around 2000 my gauge would drop to the bottom, i think thats what caused the hose to collapse ? am i driving wrong ? ---
**Author:** ![Hector](https://avatars.discourse-cdn.com/v4/letter/h/43a26b/32.png) [@Hector](https://forums.speedlife.net/u/Hector)\ **Post date:** [July 28, 2010, 9:59am UTC](https://forums.speedlife.net/t/collapsing-rad-hoses/157725/10 "2010-07-28T09:59:32Z")
headgasket ---
**Author:** ![DirrtyDevo](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/dirrtydevo/32/5547_2.png) [@DirrtyDevo](https://forums.speedlife.net/u/DirrtyDevo)\ **Post date:** [July 28, 2010, 11:19am UTC](https://forums.speedlife.net/t/collapsing-rad-hoses/157725/11 "2010-07-28T11:19:41Z")
^^^ Sounds like a oil jacket is getting threw into your coolant jacket. I was finding more coolant in my oil than oil in the cooling system with my KA hg leak. Taste your oil, no joke just a drop on your tongue. If its sweet like coolant you’ve got head gasket issues. ---
**Author:** ![BCHLR240SX](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/bchlr240sx/32/5754_2.png) [@BCHLR240SX](https://forums.speedlife.net/u/BCHLR240SX)\ **Post date:** [July 30, 2010, 2:46pm UTC](https://forums.speedlife.net/t/collapsing-rad-hoses/157725/12 "2010-07-30T14:46:59Z")
Or you could just check your dipstick.