Thermostat housing leak - 2.9i V6

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Thermostat housing leak - 2.9i V6

Post by drcdb15 » Thu May 03, 2018 7:46 pm

I have a problem, as per the thread title. Does anyone know, is this likely to be just the gasket failed (which seems odd to me, why would it?) or is the housing itself prone to fatigue cracks and splits?

A secondary point is, getting gaskets or housings for the 2.8i seems very easy, whereas there is a distinct lack of information out there about the 2.9i - are they the same, perchance?

I really don't want to disturb the housing armed with a gasket, only to find the housing itself is shot and it takes months to find a replacement.

As always, thanks for your experience.


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Thermostat housing leak - 2.9i V6

Post by DARK STAR » Thu May 03, 2018 9:56 pm

Not had any trouble with the 2,9 (yet) but on my 2,8 the housing was cracked.
It had been stuck back together with mastic by the previous owner, this bodge actually held together for a while ...
Sorry, I don't know if they are the same but I may have both cars in the same place this weekend so I'll have a look.


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Thermostat housing leak - 2.9i V6

Post by scimjim » Thu May 03, 2018 10:39 pm

Very different IIRC.


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Thermostat housing leak - 2.9i V6

Post by drcdb15 » Thu May 03, 2018 10:54 pm

DARK STAR wrote:
Thu May 03, 2018 9:56 pm
Sorry, I don't know if they are the same but I may have both cars in the same place this weekend so I'll have a look.
Thanks for that, it would be very helpful. While you're under the bonnet, is there any chance you could see how different or the same are the water hoses for the two engines, please ? I'm still trying to find some way forward on getting silicone hoses for the 2.9, and it's established at least a mandrel set exists for the 2.8.

Thanks enormously.


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Thermostat housing leak - 2.9i V6

Post by peter freeman » Fri May 04, 2018 9:04 am

Here's one needs a new pipe but that should not be beyond repair. https://www.ebay.co.uk/itm/Ford-2-9-V6- ... OSwdjha4h5~. If you don't want it then let me know as I will buy it as a spare as they seem to be rare.



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Thermostat housing leak - 2.9i V6

Post by drcdb15 » Fri May 04, 2018 12:08 pm

peter freeman wrote:
Fri May 04, 2018 9:04 am
Here's one needs a new pipe but that should not be beyond repair. https://www.ebay.co.uk/itm/Ford-2-9-V6- ... OSwdjha4h5~. If you don't want it then let me know as I will buy it as a spare as they seem to be rare.
Thanks for the heads up Peter. At least that has given me a Ford part number, but I will pass on buying as it looks like a good advert for Evans waterless coolant ! :lol:


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Thermostat housing leak - 2.9i V6

Post by Roger Pennington » Fri May 04, 2018 12:37 pm

drcdb15 wrote:
Thu May 03, 2018 10:54 pm
While you're under the bonnet, is there any chance you could see how different or the same are the water hoses for the two engines, please ? I'm still trying to find some way forward on getting silicone hoses for the 2.9, and it's established at least a mandrel set exists for the 2.8.
A word of caution on that - I suspect most of DarkStar's radiator feed and return pipes will be different from Middlebridge ones as Chris' is a custom installation in a Coupe?


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Thermostat housing leak - 2.9i V6

Post by peter freeman » Fri May 04, 2018 1:33 pm

Well I have just bought it.



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Thermostat housing leak - 2.9i V6

Post by DARK STAR » Fri May 04, 2018 1:45 pm

Having taken into account Roger's comment :wink: I have researched the subject.
Here are all the images to show that almost nothing on a 2,9 is the same as a 2,8.
Incidentally there are two different versions of some 2,8 parts too, aren't Ford wonderful.
Attachments
ford 2,9 thermo.jpg
ford 2,9 thermo.jpg (183.97 KiB) Viewed 1616 times
ford 2,9 pump.jpg
ford 2,9 pump.jpg (95.43 KiB) Viewed 1616 times
ford 2,9 hoses.jpg
ford 2,9 hoses.jpg (132.1 KiB) Viewed 1616 times
ford 2,8 water pump.jpg
ford 2,8 water pump.jpg (164.39 KiB) Viewed 1616 times
ford 2,8 thermo rear.jpg
ford 2,8 thermo rear.jpg (129.99 KiB) Viewed 1616 times
ford 2,8 thermo front.jpg
ford 2,8 thermo front.jpg (121.48 KiB) Viewed 1616 times
ford 2,8 pump.jpg
ford 2,8 pump.jpg (120.3 KiB) Viewed 1616 times
ford 2,8 hoses.jpg
ford 2,8 hoses.jpg (225.66 KiB) Viewed 1616 times


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Thermostat housing leak - 2.9i V6

Post by peter freeman » Fri May 04, 2018 2:05 pm

The housing on my MB looks like the one I pointed to ( and have now bought ) on Ebay



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Thermostat housing leak - 2.9i V6

Post by DARK STAR » Fri May 04, 2018 2:28 pm

Ok, there are several versions of the 2,9 as well :bh


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Thermostat housing leak - 2.9i V6

Post by drcdb15 » Fri May 04, 2018 8:41 pm

DARK STAR wrote:
Fri May 04, 2018 1:45 pm
Here are all the images to show that almost nothing on a 2,9 is the same as a 2,8.
Incidentally there are two different versions of some 2,8 parts too, aren't Ford wonderful.
Actually from my research I think you'll find there are at least THREE versions of these engines, designated BOA, BOB and BOC or something similar as I recall. And I appreciate that the similar appearances may be superficial. Against that, Ford is unlikely to make a completely new different part when it is feasible to dip into the parts bin and use something exisiting. The issue then is to see which items are the same and which are not - which is the value of having both 2.8 and 2.9 literally side by side.

On a slightly different tangent...

Mods, apologies as I only searched in Middlebridge but I now see Simmit had a thread very similar to this about a year ago in General Technical discussion, "2.9efi Thermostat Housing" or similar - is it worth linking them?

Back to my own issue. Here are some pics of my housing today. Your starter for ten - where is the leak, is it:
A: a hose giving up the ghost?
B: the gasket gone west? or
C: the housing is splitting under the emotional pressure of being fitted to such a superlative motor car?
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014.JPG (149.54 KiB) Viewed 1592 times
015.JPG
015.JPG (149.03 KiB) Viewed 1592 times
018.JPG
018.JPG (173.33 KiB) Viewed 1592 times


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Thermostat housing leak - 2.9i V6

Post by scimjim » Fri May 04, 2018 10:05 pm

BOA & BOB are the Cosworth 24v versions.


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Thermostat housing leak - 2.9i V6

Post by mick_gaugh » Fri May 04, 2018 10:58 pm

Hi Gents

The 2.9 thermostat housing in VGC is indeed a rare beast nowadays but do occasionally come up on Ebay. I can also confirm that Burtons & Classsic Ford Parts ran out some time ago.

I have also spoken with George about the silicone hoses for the Middlebridge and he is going to visit the Company that has the full set of std' hoses as patterns. (this will take a few weeks as George will be sunning it from Sunday).

Hope this helps a little

Mick G



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Thermostat housing leak - 2.9i V6

Post by DARK STAR » Sat May 05, 2018 6:05 am

Just for interest, here is a brand new Middlebridge engine (mine in 1994)
Attachments
1994 engine transplant scimitar 4.jpg
1994 engine transplant scimitar 4.jpg (223.68 KiB) Viewed 1547 times
1994 engine transplant scimitar 3.jpg
1994 engine transplant scimitar 3.jpg (271.14 KiB) Viewed 1547 times


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