coolant boil over help

[willz52]

yea lol we usually park up and go for a walk.

last year got stuck in the parade when we were tryna get out and that wasn't pretty.

[pl0x]

 willz52 said:

yea lol we usually park up and go for a walk.

last year got stuck in the parade when we were tryna get out and that wasn't pretty.

lmao i heard about that i think

[willz52]

just update on car.

for reference to others. ended up having a massive split in intercooler pipe going to turbo which was causing my boost problem for ages and therefor blowing headgasket for being left so long.

picking car up in 2 hours, got cam done, red top repainted and new piping and everything should be mint as now.

will post up pics once get it back!

hope this helps others if it happens to them

[Guest]

TK tests are not conclusive, you need to do a leak down test with the engine hot or presserise each cylinder at tdc with compressed air and watch the water rise or fall at the header tank. could also be thermostat but not likely.

[Guest boostcut]

 EVILRS said:

TK tests are not conclusive, you need to do a leak down test with the engine hot or presserise each cylinder at tdc with compressed air and watch the water rise or fall at the header tank. could also be thermostat but not likely.

id take a tk head check as being conclusive.... as it chemically tests for combustion gasses present in the cooling system.... there is physically no other reason for combustion gasses to be in the cooling system other than head gsaket / cracked head or blown turbo centre( extemely rare)

[Guest]

 boostcut']

[quote name='EVILRS said:

TK tests are not conclusive, you need to do a leak down test with the engine hot or presserise each cylinder at tdc with compressed air and watch the water rise or fall at the header tank. could also be thermostat but not likely.

/quote]

id take a tk head check as being conclusive.... as it chemically tests for combustion gasses present in the cooling system.... there is physically no other reason for combustion gasses to be in the cooling system other than head gsaket / cracked head or blown turbo centre( extemely rare)

TK checks need so much exhaust gas that most mechanic's don't need to it to tell a headgasket has failed and leaking into cooling system as it's obvious !

I use the leakdown test when hot check gaskets (comp air into cylinders) best test I have found that is accurate during the last 20 odd years

Oh yeah most common cause of Subaru headgasket failure and over heating is due to blockage of heater core

[Guest boostcut]

i think the reason ive steered away from leakdown tests is because you can only put upto 120psi into the cylinder where as a running engine can have around 300psi of combustion pressure. but aslong as you properly diagnose the problem and fix it the first time any way is fine...

[Guest]

 boostcut said:

i think the reason ive steered away from leakdown tests is because you can only put upto 120psi into the cylinder where as a running engine can have around 300psi of combustion pressure. but aslong as you properly diagnose the problem and fix it the first time any way is fine...

We are taking petrol engines not diesel ;D

Yes dynamic compression higher than comp test but not by that much (180psi at idle max)

And it's only there for a m/s where 120psi shop pressure is a constant

[Guest boostcut]

do you have a leak down machine or just a hollowed out sparkplug and a air coupling on the other end?

[Guest]

have Both and they are as good as one another at highlighting HGF (head gasket failure)

[Guest boostcut]

oh ok i work a shitty little garage in tauranga and my "boss" dont even own a crescent and i have 1 apprentice and a retard floor sweeper to look after who are a hand full. i think at this stage il still go with the tk head chek for theese dicks rather than try and tell them how to set a motor up at tdc and not cross thread the plug hole

[Guest]

Sweet, main thing is accurate diagnosis

[Guest boostcut]

yeah thats wat im after... alredy had the apprentice do a head gasket on a l300 yesterday and it seized the cam because of no moly on the cam during assy. and smahed the rocker gear off the top of the motor and is going to cost bout a grand to fix..mint. guess who will be drinking bourbon while watching him tomorrow

[Guest]

OUCH

4D56 Engine ?

[Guest]

i removed the blow off valve to make the piping that goes to it as short as possible.

For a week or so after then it blew a little water when hot. Looks wack cos of the steam rising from your vents.

Its stopped and all is good now.

[Guest boostcut]

yeah it is and it was a brand spankers head from kiwi cylindr heads too. the old one had a crack in ex port and was leaking water