coolant dye

waddy1200 · Mar 21, 2015

Hi all, well I still cant find my water leak although ive seen coolant on the sump. Now ive gone and bought some uv dye. My question is if ive got a slipped liner would the dye mark the spark plugs and show up on them don't think the liner is slipped but im checking everything I can while im under the bonnet. oh its a 2001 4.0 thor. Cheers guys

wammers · Mar 21, 2015

No need for dye to check for leak into cylinders. Just remove the plugs cylinder with a leak will have a clean plug.

waddy1200 · Mar 21, 2015

cheers wammers im suspecting its the valley gasket but want to make sure on everything not wanting to spend a load of money on parts to find out it was something stupid its only loosing about 200ml in a week and a half but that's 200ml too much for me. sometimes wish id bought a diesel as I can get really cheap diesel.

wammers · Mar 21, 2015

waddy1200 said:
cheers wammers im suspecting its the valley gasket but want to make sure on everything not wanting to spend a load of money on parts to find out it was something stupid its only loosing about 200ml in a week and a half but that's 200ml too much for me. sometimes wish id bought a diesel as I can get really cheap diesel.

Can't see you have a problem with leak into cylinder from what you have said. If you did and coolant was getting into a cylinder, where coolant can go one way, combustion gas can certainly go the other. You would be getting an over pressurised cooling system. Find someone with a static test rig then you need a lamp and mirror to check for leaks with system pumped up.

waddy1200 · Mar 21, 2015

going to clean the old oil and crap off the sump and surrounding areas. system is only pressurised when it is hot when its cold there isn't any pressure at all. Do most garages have a static rig wammers.

biketeacherdave · Mar 21, 2015

iv been chasing leaks for weeks using uv dye its great stuff.

if its on your sump try tracing it upwards the uv light that comes with the dye will show it up no problem.

i seem to have porous hoses

waddy1200 · Mar 21, 2015

Well its either use the dye or replace every single component on the cooling system which works out rather expensive not just for the parts but more like the shopping trip to meadowhall for my wife so I could get away with spending that much money on my car

waddy1200 · Mar 21, 2015

The other thing I noticed yesterday was the bottom of the rad and the pipe from the thermostat to the rad were cold the top of the rad and all the other pipes were nice and hot

wammers · Mar 21, 2015

waddy1200 said:
The other thing I noticed yesterday was the bottom of the rad and the pipe from the thermostat to the rad were cold the top of the rad and all the other pipes were nice and hot

Think you need to take a look at that.

waddy1200 · Mar 21, 2015

yeah going to put a new rad on it wammers cos it isn't right just found coolant on the side of the centre console as well looks like its o rings time

wammers · Mar 21, 2015

waddy1200 said:
yeah going to put a new rad on it wammers cos it isn't right just found coolant on the side of the centre console as well looks like its o rings time

Rad blocked possible, but more likely thermostat stuck shut or not opening properly.

waddy1200 · Mar 22, 2015

well ive had the dye in the coolant and found my leak its coming from the left bank front cylinder head gasket. while im doing the head gaskets is there anything else I should consider doing while im in there?

biketeacherdave · Mar 22, 2015

waddy1200 said:
The other thing I noticed yesterday was the bottom of the rad and the pipe from the thermostat to the rad were cold the top of the rad and all the other pipes were nice and hot

Well unless its overheating then that's normal on the v8 due to the bypass octopus crap thing. If it starts to get hot the stat opens then water fill flow allowing the bottom of the rad to get hot daft I know but that's how it works on the v8.

A common mod is to drill a 3mm hole in the stat to allow a small amount of cooling /flow all the time not a bad thing and also helps with air locks.

coolant dye

waddy1200

Active Member

wammers

No longer with us, RIP

waddy1200

Active Member

wammers

No longer with us, RIP

waddy1200

Active Member

biketeacherdave

Well-Known Member

waddy1200

Active Member

waddy1200

Active Member

wammers

No longer with us, RIP

waddy1200

Active Member

wammers

No longer with us, RIP

waddy1200

Active Member

biketeacherdave

Well-Known Member

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