Mayuri Krab
Active Member
- Joined
- Sep 17, 2018
- Messages
- 186
- Reaction score
- 128
- Points
- 43
- Age
- 37
- Location
- Perth, WA
- Members Ride
- VF series 2 SSV Redline, Mitsubishi 380 ES
Hi guys
As the title suggest, my upper coolant hose gets deformed when the engine is cold, not completely collapsed but you could definitely feel like there's a flat squashed section when you run your hand around it.
Thought it was caused by the usual vacuum related issue, but the difference I notice was that there doesn't seem to be any vacuum bulit up in the system when cold unlike the youtube videos I have seen.
Where as in the videos the collapsed hose bounced back to shape (& you could hear a suction sound) after opening the radiator cap & there was a drop in coolant level in the radiator. Mine did no such thing and instead seem to "default" to that slightly squashed shape as the system cools and pressure drops. There also doesn't seem to be any no drop in coolant level in the radiator.
Never the less I've followed some diy fix guides & changed a new radiator cap & cleaned the small hose that goes to the coolant reservoir tank (had a bit of yellow gunk on reservoir side, but not blocked, no gunk in radiator, water flew through fine & I blew it out ok too).
No change from the above, top hose still goes back to that slighlty squashed shape when cold.
Otherwise car seems normal, no overheating, no apparent loss of coolant & most importantly the expansion tank seem to be doing it's job of expelling & sucking in coolant (dipstick shows one extra notch when hot & then one notch less when completely cold).
Other observations: when hot, the hose is "normal round" and can definitly feel it holding shape/pressure, top & bottom hoses feels similar temperature (rules out dodgy thermostat I guess).
But it seems the "default no pressued" shape of my top hose is a slightly squashed one?
Only thing else is I'm not sure how long it's been like this (car has over 80k kms) as that deformed section is usually hidden under the stock air intake and I have only noticed it recently when I was removing the airbox to change the low beam blub.
Is this just a case of dodgy GM/Holden part? Or maybe the old cap was fault & had vaccum issues for a while and overtime deformed the hose to that shape?
Would this just be a simple case of change the top hose and refill the system?
Any other potential causes?
Thanks.
As the title suggest, my upper coolant hose gets deformed when the engine is cold, not completely collapsed but you could definitely feel like there's a flat squashed section when you run your hand around it.
Thought it was caused by the usual vacuum related issue, but the difference I notice was that there doesn't seem to be any vacuum bulit up in the system when cold unlike the youtube videos I have seen.
Where as in the videos the collapsed hose bounced back to shape (& you could hear a suction sound) after opening the radiator cap & there was a drop in coolant level in the radiator. Mine did no such thing and instead seem to "default" to that slightly squashed shape as the system cools and pressure drops. There also doesn't seem to be any no drop in coolant level in the radiator.
Never the less I've followed some diy fix guides & changed a new radiator cap & cleaned the small hose that goes to the coolant reservoir tank (had a bit of yellow gunk on reservoir side, but not blocked, no gunk in radiator, water flew through fine & I blew it out ok too).
No change from the above, top hose still goes back to that slighlty squashed shape when cold.
Otherwise car seems normal, no overheating, no apparent loss of coolant & most importantly the expansion tank seem to be doing it's job of expelling & sucking in coolant (dipstick shows one extra notch when hot & then one notch less when completely cold).
Other observations: when hot, the hose is "normal round" and can definitly feel it holding shape/pressure, top & bottom hoses feels similar temperature (rules out dodgy thermostat I guess).
But it seems the "default no pressued" shape of my top hose is a slightly squashed one?
Only thing else is I'm not sure how long it's been like this (car has over 80k kms) as that deformed section is usually hidden under the stock air intake and I have only noticed it recently when I was removing the airbox to change the low beam blub.
Is this just a case of dodgy GM/Holden part? Or maybe the old cap was fault & had vaccum issues for a while and overtime deformed the hose to that shape?
Would this just be a simple case of change the top hose and refill the system?
Any other potential causes?
Thanks.
