Leaky ol' tub
#41
#42
Installed an aftermarket valve (Four seasons 74858) this morning, using my modified connector.
Added teflon tape to the threads and removed a section from the heater hose to allow splicing in the new valve.
Easier to fit than OEM valve, more room etc.
here's a few pics of the result:
dry run assembly
head end of the repair/mod
Heater connection end view:
Plenty of room for the new valve and mechanism.
Larry
Added teflon tape to the threads and removed a section from the heater hose to allow splicing in the new valve.
Easier to fit than OEM valve, more room etc.
here's a few pics of the result:
dry run assembly
head end of the repair/mod
Heater connection end view:
Plenty of room for the new valve and mechanism.
Larry
#43
Join Date: Feb 2014
Location: Crossroads of America
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#44
Bit of a bonus - I just took her out for a test drive and my A/C temps are a good 10 degrees f colder than they have been for the what seems like the last two years, at least this and last year!
That old valve has been on the fritz for some time by the look of it, pretty amazing result though, I was really surprised when I saw the temperature gauge!☺
That old valve has been on the fritz for some time by the look of it, pretty amazing result though, I was really surprised when I saw the temperature gauge!☺
#45
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Cheers,
Don
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93SB (05-22-2019)
#46
#47
update on the leak
Well I'm afraid the source of the leak wasn't the water valve after all ...
Still, glad I replaced the valve anyway as my A/C is now performing at peak efficiency.
The leak source was, in fact, the water rail gaskets - or should I say the lack of water rail gaskets.... Much to update, but until the whole job is complete and the old bus is rolling again I'll delay further details. For now, I'll just say that PO's or their "mechanics" that install water rails without gaskets, just using silicone ....well, you can guess what I'd like to do to them.
Amazing that it lasted this long like that (7 years at least) ....however, this week, there were issues directly related to that silicone 'gasket' install that caused major clumps of hair to be pulled out while screaming profanities ..
more to come
Larry
Still, glad I replaced the valve anyway as my A/C is now performing at peak efficiency.
The leak source was, in fact, the water rail gaskets - or should I say the lack of water rail gaskets.... Much to update, but until the whole job is complete and the old bus is rolling again I'll delay further details. For now, I'll just say that PO's or their "mechanics" that install water rails without gaskets, just using silicone ....well, you can guess what I'd like to do to them.
Amazing that it lasted this long like that (7 years at least) ....however, this week, there were issues directly related to that silicone 'gasket' install that caused major clumps of hair to be pulled out while screaming profanities ..
more to come
Larry
Last edited by Lawrence; 05-30-2019 at 11:00 AM.
#48
#49
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Cinny65 (06-16-2019)
#50
Join Date: Feb 2014
Location: Crossroads of America
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My brothers Larry and Jerry,
Do not despair!
As I have repeatedly tried to encourage you, disconnecting the intake manifold and pulling it away from the cylinder head for access to the left side of the engine is not nearly as difficult as you think. I've done it many times on AJ6s and AJ16s and it truly is the easiest way to gain access to all those leaky seals, the starter, etc. Below are links to some relevant photo albums - sorry the large images are still down but the thumbnails and descriptions will give you an idea of how beneficial it is to just pull the manifold.
Air Intake Plumbing - Part 1 of 2
Air Intake Plumbing - Part 2 of 2
Throttle Body & EGR Port
Intake Manifold Disconnection
Coolant Hoses & Water Rail
Heater Water Control Valve
Common Left Side Oil Leaks
Cheers,
Don
Do not despair!
As I have repeatedly tried to encourage you, disconnecting the intake manifold and pulling it away from the cylinder head for access to the left side of the engine is not nearly as difficult as you think. I've done it many times on AJ6s and AJ16s and it truly is the easiest way to gain access to all those leaky seals, the starter, etc. Below are links to some relevant photo albums - sorry the large images are still down but the thumbnails and descriptions will give you an idea of how beneficial it is to just pull the manifold.
Air Intake Plumbing - Part 1 of 2
Air Intake Plumbing - Part 2 of 2
Throttle Body & EGR Port
Intake Manifold Disconnection
Coolant Hoses & Water Rail
Heater Water Control Valve
Common Left Side Oil Leaks
Cheers,
Don
Last edited by Don B; 05-30-2019 at 10:32 PM.
#51
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Cinny65 (06-16-2019)
#52
Don, I looked at your "coolant hoses and water rail" link and was surprised to see that you didn't mention part number EAC9745, the water rail gasket(s)?
illustrated here:
https://www.jaguarclassicparts.com/u...hose-4-0-litre
Did you install it with RTV only?
Larry
illustrated here:
https://www.jaguarclassicparts.com/u...hose-4-0-litre
Did you install it with RTV only?
Larry
Last edited by Lawrence; 05-31-2019 at 10:01 AM.
#53
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Don, I looked at your "coolant hoses and water rail" link and was surprised to see that you didn't mention part number EAC9745, the water rail gasket(s)?
illustrated here:
https://www.jaguarclassicparts.com/u...hose-4-0-litre
Did you install it with RTV only?
Larry
illustrated here:
https://www.jaguarclassicparts.com/u...hose-4-0-litre
Did you install it with RTV only?
Larry
There were also no gaskets on the oil filter housing, but I used gaskets when reinstalling it because I got a good deal on the gaskets as part of a box of NOS parts I found somewhere.
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93SB (06-02-2019)
#54
Don, I'm sure the omission of water rail gaskets (whether a late-model factory cost-cutting move or later work) was not the best idea.
As your 93 just had silicone and my 94 also, perhaps it was a factory delete. The gaskets will certainly not be omitted on reassembly.
I blame the lack of gasket material on the subsequent problems I encountered.
Larry
As your 93 just had silicone and my 94 also, perhaps it was a factory delete. The gaskets will certainly not be omitted on reassembly.
I blame the lack of gasket material on the subsequent problems I encountered.
Larry
#55
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I've never had any trouble with Permatex Ultra Grey RTV silicone where manufacturers used sealant in lieu of a physical gasket, and once I sealed our '93 it never leaked again. Right now, I have the engine out of a 2007 Mercedes SLK350, and like many modern engines the upper oil sump, cam covers and many other sealing points use liquid sealant instead of physical gaskets. As far as I can tell, Mercedes now uses gaskets only at high pressure junctures or where it would be difficult to clean silicone from the mating surfaces while replacing a component, such as the water pump.
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93SB (06-02-2019)
#56
Don -
The sealant did work for at least seven years on my car, possibly even from new (if the gaskets were a delete) - however, the parts catalogue shows gaskets at the water rail throughout the VIN range and even for the X300 models.
The gipe did seal the water rail from leaking, yes, but it did not isolate or seal the lower water rail bolts from the coolant completely, as evidenced by the severely rusted threads. One bolt was so heavily corroded that it seized solid in the block and sheared off as soon as I tried to remove it. I learned later that this is not the only case where this happened and apparently lucky that only ONE bolt snapped.
I don't think the coolant could have seeped to those bolts quite as easily if gasket material had been used on the rail in the first place.
Larry
The sealant did work for at least seven years on my car, possibly even from new (if the gaskets were a delete) - however, the parts catalogue shows gaskets at the water rail throughout the VIN range and even for the X300 models.
The gipe did seal the water rail from leaking, yes, but it did not isolate or seal the lower water rail bolts from the coolant completely, as evidenced by the severely rusted threads. One bolt was so heavily corroded that it seized solid in the block and sheared off as soon as I tried to remove it. I learned later that this is not the only case where this happened and apparently lucky that only ONE bolt snapped.
I don't think the coolant could have seeped to those bolts quite as easily if gasket material had been used on the rail in the first place.
Larry
#57
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Sealant is normally fine for cooling system joints as long as the surfaces are properly cleaned and dried and the sealant properly applied. I think I remember that Haynes specifies sealant for the thermostat housing and water pump.
Last edited by Don B; 05-31-2019 at 10:04 PM.
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93SB (06-02-2019)
#58
If it breaks,at least here is a good place to do it.
OK folks,last Sunday,my friend Larry from Victoria came by in the early afternoon,while we were sitting around in the middle of the street having our neighborhood BBQ.
We chatted for a bit,then he was off to see another friend up island.Larry said he might swing by later on in the day.
Well, after a great BBQ,and many beers in the hot sun,Larry did swing by,with a massive coolant leak!
We got the car into the back yard,got her up on stands and had a look.Water was coming out FAST!
Me being 3 sheets to the wind with the sun going down,am not going to have a go at this until tomorrow after work.
So, arrangements were made,Larry would come by next day and have a go at the problem.When I got home,there I found a very dejected Larry,and his buddy trying to wrestle with a broken bolt.
SOOOOO,I hauled out my welding machine,and made 20 or so attempts to weld a nut onto the broken stub,got it moving,but no go.
We as a tired group then removed the manifold,made more arrangements,and I would procure more tools and get them home the next day.
Larry's car up on the patio,with My Jag looking on
After two hours of fighting,welding,and an acetylene torch,I got the bolt out
We chatted for a bit,then he was off to see another friend up island.Larry said he might swing by later on in the day.
Well, after a great BBQ,and many beers in the hot sun,Larry did swing by,with a massive coolant leak!
We got the car into the back yard,got her up on stands and had a look.Water was coming out FAST!
Me being 3 sheets to the wind with the sun going down,am not going to have a go at this until tomorrow after work.
So, arrangements were made,Larry would come by next day and have a go at the problem.When I got home,there I found a very dejected Larry,and his buddy trying to wrestle with a broken bolt.
SOOOOO,I hauled out my welding machine,and made 20 or so attempts to weld a nut onto the broken stub,got it moving,but no go.
We as a tired group then removed the manifold,made more arrangements,and I would procure more tools and get them home the next day.
Larry's car up on the patio,with My Jag looking on
After two hours of fighting,welding,and an acetylene torch,I got the bolt out
#59
Wait,there's more
So we are left with a mangled flange,never mind the threads.It all had to be redone.
I proceeded to hand draw-file both flange surfaces back to flat and true,and fit the water rail to the block in a precise fashion.
Drilling and tapping tools at the ready
Block draw;filed,now the rail....
Gaskets cut from correct gasket materiel
Tap going in...
High quality inserts!
Inserts going in,lots of room to work.
I proceeded to hand draw-file both flange surfaces back to flat and true,and fit the water rail to the block in a precise fashion.
Drilling and tapping tools at the ready
Block draw;filed,now the rail....
Gaskets cut from correct gasket materiel
Tap going in...
High quality inserts!
Inserts going in,lots of room to work.
#60
Now wer'e cooking
OK,now we have something we can work with.New threads,well fitted water rail,thin smear of sealer on the gaskets and wer'e done.WRONG!
It has to have a new water rail BI$CH hose,cause i have one here already,and Larry popped round on the Thursday with some other hoses in better shape than the ones currently in place.
Water rail in place,properly!
Larry arrives to check progress
Fresh hoses,cleaned spigots,going back together
Me,mechanic for 35 years,focused!
Putting the Jag back together
It has to have a new water rail BI$CH hose,cause i have one here already,and Larry popped round on the Thursday with some other hoses in better shape than the ones currently in place.
Water rail in place,properly!
Larry arrives to check progress
Fresh hoses,cleaned spigots,going back together
Me,mechanic for 35 years,focused!
Putting the Jag back together