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Topic: water hose through head of 2.9 ultima (Read 344 times) |
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timbo1967
Newbie
new cosworth owner
Posts: 16
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water hose through head of 2.9 ultima
« on: Aug 17th, 2005, 7:25pm » |
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i need advice on how to replace the water hose that runs from the top of the thermostat through the head and onto the top of the water pump ? i have stripped down the inlets and taken off the aircon pump to gain access, it is leaking water so i have to change it. please help !!!!!!!!
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Eric_R
Administrator
Cosworth Owner 1998 - 2006 & site co-founder
Posts: 1792
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Re: water hose through head of 2.9 ultima
« Reply #1 on: Aug 19th, 2005, 11:18am » |
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Timbo,
Yes - this is a bit of a nightmare. 
When Cosworth raised the power of the old Cologne engine from 147 to 207bhp by slapping on two double OHC cylinder heads they obviously had to remove a lot more heat. They did this by channelling the water flow through the heads via a new housing between the V, and used a bypass type thermostat down the side of the block behind the AC compressor. In order to connect the two they used the deadspace on the n/s cylinder bank to put the coolant hose - and there's very little space. 
Other owners can see what you're up against by looking at the bottom of http://www.fordscorpio.co.uk/idleprob.htm
Can you get to the hose clip with the cylinder head in place? If so you might be able to pull the hose out of the gap, and use vaseline on the new hose and push it through the gap. Removing the cylinder head would cost about £500 for a new gasket set, so it would be worth removing the water pump housing and pulling the pipe through slightly to get more room.
You might be able cut through the hoseclip with a dremel tool, but then there may be problems pulling the hose out - and you must not allow the dremel to cut into the hose flange or it will leak forever - however, replacing the water pump housing itself would still be a lot cheaper than a n/s cylinder head removal.
While you're there and the inlets are off, examine the heater pipe and the housing carefully for any real corrosion and if you see any I strongly recommend you change anything that shows rusting, using new parts. And use the correct Ford part for the hose - this is job you only want to do once 
HTH
PS - When you've done the job can you let us know what method you used?
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timbo1967
Newbie
new cosworth owner
Posts: 16
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Re: water hose through head of 2.9 ultima
« Reply #2 on: Aug 19th, 2005, 9:28pm » |
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hi there i have now replaced the hose from ford, with all the gaskets and extras needed £57.07 including vat, not bad had to take of octopus, fuel rail, ac pump. while i was there i replaced the ac belt, o rings air penium gaskets, all in all not a bad job, a bit tricky to get the hose on at the top but with a little patience and a bit of fairy liquid it slipped on. just 1 problem tho now it is all together my car is running very rough ? i numbered the injection leads when i took them off, but could you tell me if ther is a fool proof way of putting them back on in order ?. i might of disturbed the loom on top of the engine between the V, do you think it might be that also ?, plz help
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Dave
Senior Member
Tourmallard 24v (ex-owner)
Posts: 1984
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Re: water hose through head of 2.9 ultima
« Reply #3 on: Aug 19th, 2005, 9:32pm » |
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Timbo,
if you have disconnected the battery while doing this work the ECU needs to re-learn its settings. The car needs to be driven a few miles but should settle down.
Did you replace the injector seals at the same time?
Cheers
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timbo1967
Newbie
new cosworth owner
Posts: 16
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Re: water hose through head of 2.9 ultima
« Reply #4 on: Aug 19th, 2005, 9:38pm » |
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thanx dave, no i didnt disconnect the battery, and yes i replaced all 6 injection seals. timbo
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timbo1967
Newbie
new cosworth owner
Posts: 16
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Re: water hose through head of 2.9 ultima
« Reply #5 on: Aug 19th, 2005, 9:52pm » |
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any ideas anyone 
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martin_rowe
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I love YaBB 1G - SP1!
Posts: 879
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Re: water hose through head of 2.9 ultima
« Reply #6 on: Aug 20th, 2005, 8:49am » |
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check the vacuum hoses, particularly the 'T' piece in the middle, check also the egr pipes, 'O' rings on plenum can leak also if not aligned correctly.,try squirting a little diesel engine cold start or carb cleaner round the inlet to check for leaks.
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timbo1967
Newbie
new cosworth owner
Posts: 16
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Re: water hose through head of 2.9 ultima
« Reply #7 on: Aug 20th, 2005, 12:00pm » |
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SORTED............ this is very important ! when i replaced everything i accidently lent on the air intake cover which inturn dislodged the rubber air hose just a little !!!!!!! enough tho to make the car not a car, all sorted now tho and thanx for everyones help, many regards Timbo1967.
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