These these engine seem to have issues with hoses to in general. Glad you found it, nothing worse chasing a problem that seemingly should occur.
Kaldek
2 AYC Bars
- Location
- Melbourne
- First Name
- Ed
- Drive
- 2000 Legnum VR4 Manual, Ford Territory family runabout, BMW K1300R.
I had some weird overheating on my FL. It would run fine and then overheat only after I came off a freeway run, and most recently did it just after I got off the freeway and hit the back roads going to see @TME_Steve at his workshop . It did not overheat under any other circumstances, regardless of weather.
Upon removing the thermostat from my car I discovered it was a non-genuine part. I replaced it with a Mitsubishi part. A video comparison of the thermostat from my car and the new OEM thermostat is below.
Upon removing the thermostat from my car I discovered it was a non-genuine part. I replaced it with a Mitsubishi part. A video comparison of the thermostat from my car and the new OEM thermostat is below.
- Location
- NSW
- First Name
- Steve
- Drive
- 2010 nt did pajero tow car / 2000 6spd gc8 wrx tarmac rally car / 2000 Manual Subaru Outback 2.5 just a car
Id be interested to see you test them with both in the water. And bring it up to temp more gradually. So hold it at 70 then 80 then 90 sorta thing. But yeah looks like the old one wasnt opening as far as early for sure.
Kaldek
2 AYC Bars
- Location
- Melbourne
- First Name
- Ed
- Drive
- 2000 Legnum VR4 Manual, Ford Territory family runabout, BMW K1300R.
@TME_Steve I've done the test. I place both thermostats in cold water and slowly brought them up to temperature.
The OEM thermostat opened earlier (at the correct temperature), opened faster, and was opened wider once at 100C. When heat was removed and cold water added to the pan the OEM thermostat reacted much quicker to the change in temperature.
The OEM thermostat opened earlier (at the correct temperature), opened faster, and was opened wider once at 100C. When heat was removed and cold water added to the pan the OEM thermostat reacted much quicker to the change in temperature.
Kaldek
2 AYC Bars
- Location
- Melbourne
- First Name
- Ed
- Drive
- 2000 Legnum VR4 Manual, Ford Territory family runabout, BMW K1300R.
OEM was fully open by about 95-97 according to my crappy probe. The FKR never opened as wide during the whole test but it was at its widest right at the end at 100C.
I'll upload the video to YouTube for you mate.
Off topic - I love how with my 100Mb/s upload speed I take a video, it appears on Google Photos a few minutes later and then I just click "Import from Google Photos" in my YouTube account without having to upload it again. Sweet as.
I think I'm having identical issues, perhaps you can confirm the symptoms... My VR-4 pushes out coolant out of the overflow - when driving gently it just looses up to 1/4 and then doesn't push out any more. Radiator just stays barely filled and engine does not overheat. On a trackday it can push out all the coolant in a matter of 10 minutes of flooring it. No sign of oil in the coolant, no white exhaust fumes, compression test just fine. Only weird thing is the carbon/soot residue in the coolant.
My VR-4 has the original water hoses it came with from the factory, I'm guessing they just get tired and start deteriorating, clogging up the water passages.
They separate and send rubber through water passage and block up water ports in block . Heads have to come off to fix issue I tried flushing no effect had leak and pressure testing heads checked. Went through a lot of bullshit before I went stuff it pull heads off found problem straight away. Was like a bicycle tube in pieces blocking it up.
