Turboman
Mab An Gov
Head doesn't need skimming if it is straight. Cracks can be hard to spot, check really carefully, especially round and between valves. If in doubt, get the head pressure tested, may save dong the job again.
Head doesn't need skimming if it is straight. Cracks can be hard to spot, check really carefully, especially round and between valves. If in doubt, get the head pressure tested, may save dong the job again.
IamRobbie
Well-Known Member
swapped the head for a new one last night in about 4 hours, cleaned up the new head, swapped the injectors over and glow plugs ect and put the thermostat housing on, charged the battery last night and she fired up this morning, however i did hear a blowing noise from 2 injectors so they had to be taken out and put back in with new copper washers.
She still breathes heavy from the cyclone breather so I'm guessing its worn rings. I did have a feel of the bore when the head was off again and there is no scoring or anything like that.
Ill run it up to temp tomorrow to see if it loses any water but I'm still unsure as to where it actually goes even when its not been running. can't seen any leaks anywhere.
She still breathes heavy from the cyclone breather so I'm guessing its worn rings. I did have a feel of the bore when the head was off again and there is no scoring or anything like that.
Ill run it up to temp tomorrow to see if it loses any water but I'm still unsure as to where it actually goes even when its not been running. can't seen any leaks anywhere.
Turboman
Mab An Gov
Bore wear is rare on a Tdi, if it has been reasonably looked after. Have you checked to make sure the vacuum pump isn't pressurising the crankcase?
IamRobbie
Well-Known Member
ill have to google how to check that buddy. Im sure that it wasn't blowing before the head gasket or head change tho. i changed the head because i was losing water and it was seeming to breath heavy steam, possibly just oil vapour but its pushing oil through as i can see it drip out the breather cyclone.
Turboman
Mab An Gov
Pull the rubber pipe off it, and block the air inlet completely, if the crankcase pressure goes away, you have a split servo diaphragm or a leaky rubber pipe
Turboman
Mab An Gov
Pipe from the vacuum unit to the brake servo is the one I mean, doesn't come from crankcase.
Turboman
Mab An Gov
IamRobbie
Well-Known Member
haha sorry...
The rubber pipe that goes into the brake servo...
when i swapped the bulkhead (at the same time as replacing the head gasket) i accidentally pulled the rubber pipe off the brake servo. I pushed this back in but it hasn't gone fully in. could the air be getting in through there?
The rubber pipe that goes into the brake servo...
when i swapped the bulkhead (at the same time as replacing the head gasket) i accidentally pulled the rubber pipe off the brake servo. I pushed this back in but it hasn't gone fully in. could the air be getting in through there?
Turboman
Mab An Gov
Definitely! Any air leakage in that vacuum system will pressurise the crankcase.
IamRobbie
Well-Known Member
Gutted... Pushed that bung in a then hammered it with with the end of my phone, started the truck and it's not blowing the slightest....
I sat on the drive sorting my sockets and spanners out and I looked at my steering guard and noticed drips hanging off it... Drips of water hmmm. ..
Looked behind the electric fan and I'm sure that my rad is leaking and the waters going underneath it... It must be!!!
Changed the headgasket twice as it was losing water for the first time and puffing like mad the second... Best order a new rad next lol
I sat on the drive sorting my sockets and spanners out and I looked at my steering guard and noticed drips hanging off it... Drips of water hmmm. ..
Looked behind the electric fan and I'm sure that my rad is leaking and the waters going underneath it... It must be!!!
Changed the headgasket twice as it was losing water for the first time and puffing like mad the second... Best order a new rad next lol
Turboman
Mab An Gov
I don't think you need to re-torque those heads, and shouldn't Tdi heads be tightened by angles, not torques?
I don't think you need to re-torque those heads, and shouldn't Tdi heads be tightened by angles, not torques?
initial torque of 40nm, which is low then angles
dunno what the op is doing, apart from destroying his phone and engine
