Renault Laguna II - Phase 1 - Engines - Turbo Diesel Engine Problems - Page 3 - Renault Forums :: Independent Renault forum

LinkBack Thread Tools Display Modes
post #11 of 100 (permalink) Old 12th August 2005
A former user
Posts: n/a
I have a petrol Laguna and I have read all the stuff on the Parkers Forum which should be taking with a degree of sensibility as mentioned above.

The problem with Turbo 's ( on all cars ) is that they are a neccesary evil used by manufacturers in Diesel Engines to provide the ooommmpphh that most of us think we need to get around these days.

Turbo 's however operate at very high speed and temperature and therefore the containmination in the airflow by the way of carbon deposits or worse still debris will lead to a major failure.

Noisy Turbo means one of these things below although a damaged Turbo would also normally mean reduce performance and increased oil useage from the engine.

1.Damaged turbocharger
Determine reason for failure - repair or replace turbo

2. Air pipe into turbo restricted
Replace pipe

3. Air pipe from filter to turbo leaking
Check hoses for splits and tighten hose clips

4. Air pipe from turbo to inlet manifold leaking
Check hoses and intercooler for leaks and replace

5. Carbon build-up in turbo bearing housing
Change engine oil and filter-overhaul or replace turbo

6. Blockage in exhaust system
Replace silencers or catalytic converter

7. Exhaust gas leaking from manifold
Replace gasket or manifold - check bolts for tightness

I have no doubt that problems exist and untill Renault make a statement about the design and pull their finger out the rumours will grow and grow..

If buying a second hand Lag II turbo diesel ( 1.9 or to a lesser extent the 2.2 ) it has been said that the intercooler tends to bulge if their is a problem with the turbo . Maybe someone could post a picture of their intercooler to assist.
Sponsored Links
post #12 of 100 (permalink) Old 13th August 2005
Junior Member
Join Date: Jul 2005
Posts: 29
Nominated 0 Times in 0 Posts
TOTW/F/M Award(s): 0
Thanks: 0
Thanked 3 Times in 1 Post
Laguna II Owner - you forgot one:-

8. Faulty EGR valve or control circuitry. Results in engine running too hot, and causing the turbo to overheat. (Credit to Antmat on Parkers for this one).
badams is offline  
post #13 of 100 (permalink) Old 13th August 2005
A former user
Posts: n/a
Bloody good point Badams I didn't fully explain that one at all ( **** it )

I am afraid the credit must go to Honest John who first reported this following feedback from the trade...

"On 1.9DCIs EGR valve should open to allow carbon dioxide, which acts as a cooling gas) into the combustion chambers when the engine is under load (>30% boost). This allows the combustion chamber temperature to drop and thus the temperature of the exhaust gases. If it sticks in the closed position the exhaust gas temperature will rise causing a) the turbo bearings to fail and b) engine oil into the induction system. This will cause the engine to go on running until it has consumed all its oil and then it will go bang.Problems with EGR valves in Renault dCi engines are often the cause of rough running when the valve is stuck in the open position as well. In several cases turbos have blown but the EGR valve has not been replaced. Inevitably the new turbo unit will not last long. "

Honest John
post #14 of 100 (permalink) Old 13th August 2005 Thread Starter
Diamond member
Bigstu's Avatar
Join Date: Jul 2005
Posts: 194
Nominated 0 Times in 0 Posts
TOTW/F/M Award(s): 0
Thanks: 0
Thanked 4 Times in 4 Posts
So a regular inspection of the EGR Valve is necessary. I’ve spoken to a Renault service engineer regarding the turbo noise and it's not supposed to make any. When the engine runs around 1400 RPM cold I get that howling noise, it can be clearly heard but when warm is quietens down a little. IV checked piping which seem ok. The modded intercooler looks ok to, when looking at it from the front with the grill off, the left side is just slightly higher than the other side but I think that may be due to the rad uneven. Could this be an airleak or bearings.
1 other thing is that if the EGR valve got stuck and the engine got hot, would the temp gauge rise above normal. Mine sits below the mid range.

Currently in Bigstu's garage:
Laguna II 2.2 DCI
Bigstu is offline  
post #15 of 100 (permalink) Old 24th August 2005
Diamond member
Mickdoc's Avatar
Join Date: Aug 2005
Posts: 209
Nominated 0 Times in 0 Posts
TOTW/F/M Award(s): 0
Thanks: 0
Thanked 0 Times in 0 Posts
Intercooler & Renault Customer Services

I have been following most of these issues in Parkers and recognise the names.

My 02 Laguna 1.9 Dci Initiale Sports Tourer has the same symptoms. I bought it at BCA Nottingham where it had been entered by Renault UK 5/8/05 - Mileage 56,671 full RSH Last serviced 55,068 and 1st MOT at Renault Dealer in Nottingham on 27/06/05.
Now reading 56,899.
Injector warning came on a couple of days ago and I then thought I would check the intercooler (See picture)[/IMG] Someone in a previous thread asked what they look like!
Contacted RCS - They did not want to know, stated it was out of warranty (17/7/05) would offer no goodwill payment.
Stated there was no issue with the intercoolers! Would not tell me what is in the Warranty History of the car or whether any issues have arisen with the Turbo etc.

It is booked in for a replacement intercooler at a local Renault Dealership tomorrow Circa 270 inc.

References have been made to the 2.2 Dci engine and I have had 4 previous Renault diesels which, with regards to the engines have been exrtremely reliable, my last Espace 99T plate, had done 180k - consequently I thought most of the gripes were from a limited number of complainants and not indicative of the marque.

My previous Laguna (2.2 Dci) 53K had the injector faults which Renault could not identify despite having had it in for 10 days fortunately under Warranty - I now wonder whether the intercooler had gone on that! Wonder how the new owner is getting on with it.
Attached Thumbnails
Click image for larger version

Name:	PICT0115.JPeG
Views:	662
Size:	95.7 KB
ID:	70  
Currently in Mickdoc's garage:
2006 Renault Scenic 1.5dCi privilege

Last edited by Mickdoc; 25th August 2005 at 05:55 PM. Reason: Trying to insert picture
Mickdoc is offline  

diesel , engine , engines , laguna , phase , problems , renault , turbo

Quick Reply

Register Now

In order to be able to post messages on the Renault Forums :: Independent Renault forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may not post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome