Pay particular attention when mounting this turbo on the engine, as the seal between the turbo and the exhaust downpipe can be mounted in two different ways, and only one is correct.
As can be seen in the photos below, there is only one way to correctly seat the seal. If incorrectly seated, the exhaust gas inlet to the turbo exhaust is partly blocked and the turbo will not operate correctly.
Incorrect fitment could result in turbocharger failure.
If a replacement is not fitted there is a risk of possible further turbo breakdown.
Note: Also check there is no carbon build-up in the exhaust down pipe to prevent the possibility of further damage.
INSTRUCTIONS FOR REPLACING A TURBO
Experience has shown us that the cause of a turbo failure is to be found in the turbocharger’s direct environment. For this reason, it is essential to determine the cause of the failure and correct it before mounting a new turbo, in order to prevent a re-occurrence. If the problem is not correctly identified then, within a short space of time, the turbo is likely to fail again.
When mounting a turbo, the following instructions are essential. Furthermore, failure to comply with any of these instructions could invalidate the warranty.
- Do not replace the turbo until you know the reason for the deterioration or failure.
- Inspect the oil inlet and outlet pipes and clean if necessary.
- Inspect the suction pipes and engine exhaust gas manifold and clean if necessary. Any foreign body or narrowing of the pipe caused by an obstruction could cause damage.
- Do not apply any type of sealant to the oil inlet and outlet seals.
- Change the oil filter and replace oil using the correct grade as recommended by vehicle manufacturer’s specifications. Prime turbo with oil syringe before starting up engine.
It is very important to ensure that the turbo lubrication is correct since this is one of the principle causes of failure.
- Check that the oil return pipe is straight and that there are no blockages to ensure an adequate oil return.
- Replace the air filter and check that the hoses are in good condition.
- Please change all gaskets supplied with the turbo.
- Once the new turbo has been mounted, start-up the engine and leave it idling for a minute. Then check the operating pressure with the engine at full load. Leave the engine idling for a few seconds before switching it off (do not put the engine under any heavy acceleration just before switching off).
For your safety, you are advised not to touch the turbo whilst it is operating, nor immediately afterwards, given the fact that the turbo could be at a very high temperature.
REPLACEMENT OF THE RENAULT 1.9DCI TURBO
In the majority of cases, the turbo mounted on the Renault 1.9Dci engine fails as a result of the entry of a foreign object which then impacts against the turbo inlet turbine.
Whenever the turbo is replaced, the air filter should also always be replaced and the inlet pipes, bushings and clamps should be inspected for foreign objects or any remains of the damaged turbo turbine.
It is also extremely important to replace the oil decanter coming from the engine gas vent, since there is a considerable risk of some foreign object getting into the turbo along this route.
The Renault reference for the decanter is 8200707066
If these instructions are not followed, there is a serious risk of a further turbo breakdown.