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Topic: EGR rubber pipes (Read 1779 times) |
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leewar
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EGR rubber pipes
« on: Jun 12th, 2011, 5:54pm » |
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Would there be any possible reason for the two pipes just to blow/come off. Pressure being a possibility? Lee
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scorpio_man
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Re: EGR rubber pipes
« Reply #1 on: Jun 12th, 2011, 7:27pm » |
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Hi there
you might have the start of the cat blocking the exhaust.
hth
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leewar
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Re: EGR rubber pipes
« Reply #2 on: Jun 14th, 2011, 12:10am » |
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Scorpio man, I had a sneaky feeling someone was going to say that, but then again hoped it wasn't that  The pipe blew off again today, well more like melted and split and the heat of the air blowing out of the egr pipe was baking hot. This all seems to have started after I found a three inch long crack in the top of the manifold and I sealed it with exhaust paste Lee
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Tompion
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1997 2.3 Ultima estate.
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Re: EGR rubber pipes
« Reply #3 on: Jun 15th, 2011, 1:15am » |
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Lee
I had to replace the pipes on mine a while ago, initially one split & I cut the end off but it split again after a while, although it was still soft it had become fragile.
If yours have got like that & are leaking then they are likely to get hotter because the exhaust gas will flow through the pipe instead of just registering the pressure changes which in turn I would imagine could result in them melting.
I had some suitable size rubber pressure fuel pipe that I fitted instead – not had any problems so far with that.
Dave
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Simmo
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Re: EGR rubber pipes
« Reply #4 on: Jun 15th, 2011, 7:19am » |
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'Young' Lee  , Have a look at This page which may help.
You'll see that I picked this out from a Search so you might wish to read through the other posts below it as they have a great deal of info.  Mike
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leewar
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Re: EGR rubber pipes
« Reply #5 on: Jun 15th, 2011, 10:20pm » |
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What I have found is that the pipes are coated inside with a white residue.
Dave, I replaced them with the ones form my other car and it shot them to pieces as well. I'm leaning to scorpio-mans suggestion that the cat is blocked, hence my other post about holding back, lack of power. Lee
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leewar
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Re: EGR rubber pipes
« Reply #6 on: Jun 15th, 2011, 10:44pm » |
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Mike, Thanks for the links, interesting stuff which brings me to a read done by pegasus at the last meet. Three codes came up:
1) P0141- Downstream heated oxygen sensor heater circuit failure Bank 1
2) P0402-EGR flow excessive at idle
3) P1406- Differential pressure feedback electronic sensor circuit downstream hose.
No2 means stuck open?
No3 hose fail
No1 
Has the EGR failed or is failing. Could explain the holding back/lack of power Lee
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Tompion
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1997 2.3 Ultima estate.
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Re: EGR rubber pipes
« Reply #7 on: Jun 15th, 2011, 11:55pm » |
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There shouldn’t really be any flow through the EGR at tickover.
You should be able to pull the vacuum pipe of the top of the EGR at tickover without it affecting the engine & you shouldn’t be able to detect any air/gas going in/out of the top of the EGR. Nor should you be able to detect air going into the vacuum pipe – if you can then there may be a problem with the EVR although it says here there will be some air passing:
http://www.fordscorpio.co.uk/egrsensors.htm
What happens is when the EVR is closed air is drawn in through its filter, as the EVR is commanded to open it gradually closes the passage to the filter & opens the one to the EGR.
With the engine off you should be able to lift the valve easily if you suck on the pipe at the top of the EGR & hear it drop with a clunk when you stop. If the diaphragms’ split you’ll probably get a lung full of exhaust so best done with an engine that hasn’t been run recently.
Even if the EGR valve does drop with a clunk it could still be leaking, you could try temporarily blanking off the pipe from the exhaust manifold with a coin where it enters the EGR to see if it improves the holding back/lack of power.
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Jonnycab
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Re: EGR rubber pipes
« Reply #8 on: Jun 16th, 2011, 4:29am » |
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on Jun 14th, 2011, 12:10am, lleewar wrote:| This all seems to have started after I found a three inch long crack in the top of the manifold and I sealed it with exhaust paste Lee |
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Exhaust (Gun-Gum) paste isn't strong enough to seal a crack in the exhaust manifold. It needs to be welded/brazed or replaced 
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leewar
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Re: EGR rubber pipes
« Reply #9 on: Jun 16th, 2011, 12:34pm » |
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Dave, did your suck test and got the valve clunk with, I might add, no exhaust taste at all even after it had been run!
With engine running, pulled of egr pipe and no change as you say.
What is P0141?
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Simmo
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Re: EGR rubber pipes
« Reply #10 on: Jun 16th, 2011, 1:44pm » |
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Lee. P0141 is downstream oxygen sensor fault.The full list is Here. Mike.
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leewar
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Re: EGR rubber pipes
« Reply #11 on: Jun 16th, 2011, 1:54pm » |
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Thanks Mike, That's where I got the info from. I just don't know what is is or means Lee
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Simmo
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Re: EGR rubber pipes
« Reply #12 on: Jun 16th, 2011, 2:31pm » |
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Ok. Have you read This one then?. There are other 'buttons' on the left of the page which may also help.
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leewar
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Re: EGR rubber pipes
« Reply #13 on: Jun 16th, 2011, 3:51pm » |
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Thanks Mike, I have changed the front sensor and still I have running problems. Looks like it's a cat change job for me unless there is something else I am missing Lee
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Tompion
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1997 2.3 Ultima estate.
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Re: EGR rubber pipes
« Reply #14 on: Jun 16th, 2011, 4:04pm » |
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on Jun 16th, 2011, 12:34pm, lleewar wrote:Dave, did your suck test and got the valve clunk with, I might add, no exhaust taste at all even after it had been run!
With engine running, pulled of egr pipe and no change as you say.
What is P0141?
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No taste after engine running - you shouldn't be able to draw much air out, just what's above the diaphragm.
I suppose if the cat is blocked the pressure may be able to lift the EGR – but whether it could do that before the rubber pipes come off I don’t know.
You could get someone to listen while you drive by, I think the hissing you sometimes get from a blocked cat isn’t always apparent to the driver.
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leewar
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Re: EGR rubber pipes
« Reply #15 on: Jun 16th, 2011, 4:53pm » |
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Dave, I expected some exhaust in the lungs after sucking the valve up, so I assume the diapraghm hasn't split as I had driven the car just before testing.
Maybe I should replace the pipes and see if they blow off again, hence cat replacement. Lee
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leewar
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Re: EGR rubber pipes
« Reply #16 on: Jun 16th, 2011, 4:54pm » |
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Is there a seal between the cat and the manifold?
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Tompion
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1997 2.3 Ultima estate.
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Re: EGR rubber pipes
« Reply #17 on: Jun 16th, 2011, 6:05pm » |
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Yes I think it may be Mica, it sits in a shallow recess in the cat.
For the 2.3 the manifold gaskets are:
Scorpio 95, (+)"GB", DOHC 2.3 (145PS),4 Door Saloon, RHD
-Gasket (Cat-Manifold)
Part Number: 7046482
Scorpio (+)"GB" DOHC 2.3 (145PS) 4 Door Saloon RHD
Exhaust Manifold Gasket
Part Number: 7087454
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leewar
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Re: EGR rubber pipes
« Reply #18 on: Jun 16th, 2011, 9:34pm » |
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Thanks for the info Dave. Great for someone who has a 2.3 but mines a 2.0. Your now going to say they are the same aren't you
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gozz
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Re: EGR rubber pipes
« Reply #19 on: Jun 16th, 2011, 9:39pm » |
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I reckon they are Lee.
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