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Author Topic: Head gasket 3.2 v6  (Read 15893 times)

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Raeturbo

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Re: Head gasket 3.2 v6
« Reply #15 on: 11 June 2018, 23:01:17 »

Speak as I’ve found......, seems to be pretty good this forum, and I’m very grateful for all the replies,
been a member Autobahnstormers for many years now and that’s a real good un too, as I’m sure many in here know only too well. I will be weighing up the options and see what I decide.

As a few no doubt have been in this predicament their selves after spending out and having to either
Fork out or let it go for peanuts, I’m sure you will understand my dilemma.
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Doctor Gollum

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Re: Head gasket 3.2 v6
« Reply #16 on: 12 June 2018, 00:00:32 »

If you like it, and have some time in it then get it fixed...

A full service and a set of tyres doubles the values of most Omegas, and that's before you add fuel...

If it's a complete shitter, and about a month from its last mot then bin it...

Simples ;)
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Raeturbo

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Re: Head gasket 3.2 v6
« Reply #17 on: 12 June 2018, 00:16:23 »

Agreed but it’s had two new engine mountains, new discs and pads all round, new tyres all round, two new wishbones, new thermostat and cam belt kit, all new filters, plugs, new ignition packs each side, lpg service, two oil and filter changes, new Ariel, and radio, long mot,  blah blah, what I forgot,
I really wanted it right, but there we are.
« Last Edit: 12 June 2018, 00:18:40 by Raeturbo »
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Doctor Gollum

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Re: Head gasket 3.2 v6
« Reply #18 on: 12 June 2018, 00:26:54 »

Then fix it ::)

That's to say take Rob up on his offer ;)

I know he has a couple of engines on the shelf which will suit your needs ;)
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Migv6 le Frog Fan

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Re: Head gasket 3.2 v6
« Reply #19 on: 12 June 2018, 07:51:10 »

Or properly investigate the problem with your own engine. At least do a compression test. Seems crazy to swap engines without properly diagnosing what is wrong with the original.
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TheBoy

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Re: Head gasket 3.2 v6
« Reply #20 on: 12 June 2018, 10:05:32 »

I'd pressure test or sniff test first, then go from there.
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zirk

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Re: Head gasket 3.2 v6
« Reply #21 on: 12 June 2018, 18:41:59 »

Whilst I agree with the Oil Cooler and Pressure / Sniff test as being first call, I do know from experience that a rapid coolant being dumped when up to normal temp can kill these engines within a few mins.
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Re: Head gasket 3.2 v6
« Reply #22 on: 12 June 2018, 19:24:01 »

Or properly investigate the problem with your own engine. At least do a compression test. Seems crazy to swap engines without properly diagnosing what is wrong with the original.
The thing is Albs, that you could waste a weekend and a couple of hundred quid swapping the head gaskets (not likely to be the real issue on this engine notwithstanding) only to find that it's still donald because the crank has spun a bearing or worse...

Swapping the engine can be done in an afternoon for the same parts cost as a pair of new head gaskets. Dead engine can then be stripped and rebuilt at leisure.  ;)

Ignoring the sarcastic comment about the radio still working if the thermostat has stuck shut or the water pump has failed, then coolant won't flow, and will get hot. If it can't expand within the system then it will build pressure and blow a hose. The top hose is almost always the one that goes as it's the largest diameter and can therefore stretch to a greater degree allowing a much higher burst pressure.

This could even have been caused by something as simple as a £5 expansion tank cap failing...
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Raeturbo

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Re: Head gasket 3.2 v6
« Reply #23 on: 14 June 2018, 09:53:14 »

No, Zirk is right, catastrophic head gasket failiure
Due to dumping all the water quickly whilst I was
Pulling hard uphill. Spun a bearing? No chance,
Engine is running very nicely once it starts if I leave
The cap very loose, the moment I rev it a little though
It bubbles violently, it’s gone, hopefully because
It happened so quickly maybe that’s all it is and
no warping or splits etc, radio will still work even
with thermostat gone but thankfully can’t get radio
one ha ha. But on serious note I don’t know if
I can justify spending any more hard earned on
her now :'(
« Last Edit: 14 June 2018, 09:56:55 by Raeturbo »
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Migv6 le Frog Fan

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Re: Head gasket 3.2 v6
« Reply #24 on: 14 June 2018, 11:26:12 »

I will believe its head gasket failure when I see pics of the failed gasket. Not trying to offend, just aware it has never been known on a 2.6/ 3.2 engine.
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Nick W

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Re: Head gasket 3.2 v6
« Reply #25 on: 14 June 2018, 13:11:01 »

I will believe its head gasket failure when I see pics of the failed gasket. Not trying to offend, just aware it has never been known on a 2.6/ 3.2 engine.


That makes it unlikely, not impossible. And the reported symptoms ARE those of a catastrophic HG failure.


Doing a leak down test would be my next step (actually several steps ago)  to actually diagnose the problem properly, rather than rely on OOF dogma.
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Alnico Blue

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Re: Head gasket 3.2 v6
« Reply #26 on: 14 June 2018, 13:22:16 »

I will believe its head gasket failure when I see pics of the failed gasket. Not trying to offend, just aware it has never been known on a 2.6/ 3.2 engine.


That makes it unlikely, not impossible. And the reported symptoms ARE those of a catastrophic HG failure.


Doing a leak down test would be my next step (actually several steps ago)  to actually diagnose the problem properly, rather than rely on OOF dogma.

Agreed ,  along with a couple of others here , 2.6 /3.2 HG failure is really unheard of ,not to say there has never been any though.  But  basic testing , as suggested, will make things much clearer rather than "guessing".
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Raeturbo

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Re: Head gasket 3.2 v6
« Reply #27 on: 14 June 2018, 20:35:43 »

While I appreciate all the help and comments
here, I must stress I have a fair bit of experience
of failures. This is chuffing out of the tank visibly
when reved and stinks of petrol, it’s failed.  It’s coming apart
pictures will be posted when we get there.
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JamesV6CDX

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Re: Head gasket 3.2 v6
« Reply #28 on: 21 June 2018, 21:17:00 »

Hi Folks,

Whilst I 100% agree we should put work in the way of the well known, excellent mechanics on the forum, please don't forget that I occasionally do free repairs for members,  and V6 Engine trouble is right up my street :y

I've agreed to sort this car out for Rae Free of Charge (apart from the cost of any parts).

The car has been trailered to me, and is on my drive.

I haven't done much more than the initial investigation work, so I'll keep it brief.

The car is a pig to start, and only goes eventially at WOT.

As soon as it starts, it does appear to idle OK on all six.

Immediately, with no delay, there is huge pressure in the cooling system.

The header tank overwhelmingly smells of petrol.

The Dipstick, looks like this:



This suggests the issue is not an oil cooler failure. (which manifests itself in oil in the coolant, not the other way around).


I then, began stripping parts out of the way to enable access for a compression test.

The engine to begin with looked like this. I noted upon opening the bonnet that it has LPG:





So, plenum off:






Off with the LPG Injectors




Off with the inlet manifold, with LPG vapour hoses attached:




Engine, without these parts attached, now looks like this:




Interestingly, the rear multi-ram actuator was not attached to the Plenum and floating loose. It also looks different to ones I have seen before:






Off with the main servo vaccum hose:





Oil Filler Cap:



2-4-6 cable tray:




This next part made me laugh out loud. 10 out of ten for effort :D



You see above that the coil pack is held down with a bracket of metal across the cam cover bolts, and a block of wood. My first thought, was, maybe the bolts that are supposed to hold it in, were stripped, or lost. (More on this later).

Here are the coil packs. They look in good enough nick, bit of damp has got to one of them but not harmed it.




1-3-5 Spark Plugs



2-4-6 Spark Plugs




Now, out with the compression tester:



And here are the readings:

Driver Side

Cyl1



Cly3



Cyl5





Passenger Side

Cyl2



Cly4



Cyl6




That's where I finished for part one.

The engine currently looks like this:




I'm doing this for Rae on the understanding that it will take me a little bit of time, as I'm currently doing two weeks physiotherapy and for both work and physical health reasons I can only dip in for a couple of hours at a time.


Interestingly, the block of wood on the nearside head, is because there are no bolt holes for the coil pack to bolt on to.

This means that the head is from an early, non DBW V6 engine, so it has had surgery before.

I also note upon a quick look that the 2-4-6 inlet cam is a "G" cam, meaning that camshaft is from a 3.0 and not a 3.2.

I'd be interested in the history leading up to that, but probably will never find out.

Also need to check the T vents are from a later model, as they do vary.

Updates to follow.

Kind regards,
James
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Migv6 le Frog Fan

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Re: Head gasket 3.2 v6
« Reply #29 on: 21 June 2018, 21:20:53 »

The plot thickens.  :-\
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