Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[Marks DTM Calib]

Lol....see those perforations in the internals.....its those that link the two together via the box......

On the case of the headgasket, I would want to see a coolant pressure test with the plenum and inlet stripped out in order to see further what issues might be there.

Remember that the coolant system should be presurised.

[Timbuk]

Lol....see those perforations in the internals.....its those that link the two together via the box......

On the case of the headgasket, I would want to see a coolant pressure test with the plenum and inlet stripped out in order to see further what issues might be there.

Remember that the coolant system should be presurised.

Normal pressure as far as im concerned

[Marks DTM Calib]

Sounding less like head gasket by the minute.....

Here is a pic of the head with the various ways colour coded:



Blue- water
Red - high pressue oil
Brown - oil return

So the question is....what is leaking where!

[Marks DTM Calib]

Re-reading the original symptoms....it sounds even less like HG.....and far more like standard exhaust output from an efficient burn with a large exhaust setup and ceramic cats.

It it was a failure of the water to bore seals (fire rings) then the coolant would be very excessively pressurised with something letting go (i.e. the pressure relief valve on the coolant tank cap)

[Timbuk]

Re-reading the original symptoms....it sounds even less like HG.....and far more like standard exhaust output from an efficient burn with a large exhaust setup and ceramic cats.

It it was a failure of the water to bore seals (fire rings) then the coolant would be very excessively pressurised with something letting go (i.e. the pressure relief valve on the coolant tank cap)  

Agreed, and it hasn't

[HerefordElite]

Lol....see those perforations in the internals.....its those that link the two together via the box......

On the case of the headgasket, I would want to see a coolant pressure test with the plenum and inlet stripped out in order to see further what issues might be there.

Remember that the coolant system should be presurised.

but this is a rear silencer not a middle box with baffles etc :-?

i thought these work by absorbing some sound through the perforations into insulation? :-/

can't see how the gas route can be forced through any baffles as the pipe is deffo straight through :-?

ps sorry for the thread hijack

[Andy B]

.....
but this is a rear silencer not a middle box with baffles etc :-?

i thought these work by absorbing some sound through the perforations into insulation? :-/

can't see how the gas route can be forced through any baffles as the pipe is deffo straight through :-?

ps sorry for the thread hijack

If the internals of an Omega's centre exhaust boxes are the same as a Senator's then they're straight through too. I cut open an OE exhaust & copied it.

[bobk]

Re-reading the original symptoms....it sounds even less like HG.....and far more like standard exhaust output from an efficient burn with a large exhaust setup and ceramic cats.

It it was a failure of the water to bore seals (fire rings) then the coolant would be very excessively pressurised with something letting go (i.e. the pressure relief valve on the coolant tank cap)

On the journey to work (about 6 Miles) the further I went the more vapor out the back especially after a short stop.  This was more than normal even for a cold morning. Temp gauge didn't get hot on the 2 journeys I've made, then the car was parked up, so I don't know if its been run long enough to get short of water and pressurize the system to the point the cap valve would vent. Your thoughts please.

[Timbuk]

Can do a pressure test?

[bobk]

Can do a pressure test?

Tried to get garage to do a pressure test, but booked up to next week

[bobk]

Think Ive got to the bottom of it, Looking very much like it's the head.
I took the top off down to the oil cooler, looked wet around the thermostat (see photo) hoped it wasn't the head after all.




Then I took the plugs out, back pot offside, all others look dry



think this seals it.  What do you think?

[JamesV6CDX]

Are you sure that water didn't go into the V when you removed the plenum coolant hoses?  :-/

[bobk]

Plugs were only removed after the plenum and manifolds had been removed.

[bobk]

Plugs were only removed after the plenum and manifolds had been removed.

Sorry didn't read it properly first time, water was drawn from the system via the bottom hose so pipes to the plenum were empty.  Have other photos that look like its been getting wet for some time.

[Marks DTM Calib]

You say its not geting hot.....in which case that points to the stat which would also cause it to run rich when warm and might help explain some of your vapour.

What you found in the valley points to a weeping oil cooler plate or stat seal....still no evidence of head trouble