help head gone ?

[dave95979]

hello long time no see

i was comming back from holliday when i got home i notist water comming out of my rad overflow bottle i filld up the water and i get air bubles if i look int the water fill up thing on the top of the engine

is it that my head or gasket has gone or could there be another reason for this
it is a ln130 2.4 h reg

please help i want it back on the road

[stormforce]

That does sound very much like the head is pressurising.I have a head on a truck i just bought in.The head is about 1 yr old.Its £190 delivered if needed.I will get the head off over the next couple of days and check it over anyway just to be on the safe side

[NiftyNev]

Flush the cooling system, change the thermostat and radiator cap, refill and bleed the air out. Make sure you have the heaters set to hot when refilling. Consider having the radiator checked, or at least try to determine if it is blocked in any way. If all that fails, check that the viscous fan is working. If you still get excess pressure and the expansion tank fills up and you have bubbles then the head could be cracked.

Nev

[Wolfracer]

Alternatively, wait for the engine to be cold. Like overnight cold.
Open bonnet, remove rad cap and start her up. Might be very lumpy to begin with as water is drawn into the cylinders.
rev the engine from the throttle cable in the engine bay and look at the coolant in the rad. If there is smoke (looks like steam), tiny "fizzy" bubbles that then lead to foam and eventually overflowing masses of foam and water, then I can pretty safely say the cooling system is being pressurised. If its from a cracked head is another matter to confirm, but in 99/100 cases I've read about it is the head, not the gasket....
Good luck and if it is the worst case scenario don't forget to "burp" the system afterwards - Free trapped air in cooling system. Mine decided to "belch" nearly 1k miles after having the head done spraying coolant all over the engine bay again.... Saying I $hit myself that the head had gone again was an understatement!

[dave95979]

thanx for all the advice

i think i will get a test to see if there are cumbustion gasses in the water

if there is i will remove the head and get that teststed if they can do it when it is off the engine

i dont know how they test them ?

and if i get a new head will my cams fit in it or will i have to get new ones?

thanx dave

[Wolfracer]

New heads come with a "new?" cam already set up. They use all the correct shims to set the openings optimally. Just bolt off, bolt on and Voila!
Roughtrax ones are exchange units, so you give them your old head and cam. I suppose if you had a more agressive custom cam and map, you could get a bare head and bolt yours on?

ETA
The head is brand new, I assume the cams are reconditioned....