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my 2003 laguna initial 1.9dci is making a loud hissing sound when i put my foot down, and black smoke from the exhaust, and a slight power loss, and coking around the exhaust
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Sounds like you've got problems then...
What is the mileage?
Does it have a FSH?
Is the intercooler bulging or swollen in any way?
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leechuter
I'm with Xileno on this; split intercoolers are a Lag II speciality.
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You need to know what state the intercooler is in as if it is swollen then that's the symptom rather than the cause of your problem. A swollen intercooler is often due to the EGR valve sticking closed, causing both the combustion chamber temp to increase and also the the air into the intercooler. I think later one had metal straps to prevent the swelling, not sure about yours though.
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there is a metal pipe and then it goes onto a rubber pipe then into the intercooler where is the egr valve? it has done 80kmiles with fsh
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This link should help. Not exactly the same engine as the 1.9 dCi in the Laguna but near enough.
www.meganeownersclub.co.uk/tips.php#egr
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Thank you all for your help i have had the intercooler and pipes cleaned all seems to be working well but i still get a hissing do i need to get a new egr valve or is it easy to just clean the old one and do i need to put any oil on it after or anything like that?
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leechuter
the intercooler and pipes cleaned but I still get a hissing
Cleaned??? What would be the point of that?
As Xileno was pointing out; these early intercoolers were unreinforced and prone to bulging and then cracking. [AFAIK nothing to do with the well-known EGR fault - just inadequately specified.]
If you've still got a hissing sound; then it's unlikely to be the EGR valve as that is built into the manifolds and operates virtually silently. It's far more likely to be a split in the intercooler that opens under pressure.
The intercooler is sandwiched between the air-con condenser and the main radiator. A quick look should show if it's top and bottom face are distended from the straight and horizontal.
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