black bag under engine

[bossko]

Today I spotted some black plastic hanging off my 172 cup. If was hanging under the middle of the engine . I pulled it free, it was the size of a black bag. Foam covered by black plastic. It may have come from the engine guard. It was also covered in grease and oil. Not sure if it was put there by garage,I bought it off. Or I've just snagged it while driving, or it belongs under car to insulate. Any clues?

Thanks

 

[George182]

Pictures would help

 

[ThomasBrentnall]

Sounds like the undertray to me. Sits between the road and the sump effectively.

 

[bossko]

It was a sheet of grey foam covered in thin black plastic. Seems odd to place foam and plastic under a hot engine.

 

[DaveDreads]

It's some of the plastic covered foam that's attached to the inside of the sump tray,
believe it or not, it's there to soak up the oil that Renault know leaks from the sump gasket.

 

[bossko]

So can I leave it off. Or would you recommend having it replaced

 

[DaveDreads]

Chuck it in the bin, I threw my entire sump tray in the bin as have alot of others,
it doesn't provide any protection for the sump as the plastic's wafer thin,
it's only really there to catch oil leaks.

Personally I like to know when i've got a leak rather than the tray hiding it and it getting worse,
not that keeping the tray's wrong, it's just personal choice.

 

[bossko]

Funny old cars really. lol bits of plastic broke off under the bumper and it has a bit more flex on the bumper. the garage said it would cost 150 quid to replace the plastic covers under the engine as it came as complete kit. Grrr was trying to restore the car. But parts and bits are failing or falling off quicker than I can replace them. lol

Cheersw

 

[DaveDreads]

Good luck on a factory resto, the exhausts came pre-rusted from the factory and they piss oil as standard,
if you have both of those then you're pure OEM.

 

[bossko]

A 197 may be a better option.

 

[DaveDreads]

I doubt it. lol

172 cups, ph1 172's and Trophy's are they one's that people will want as classics in the future.

 

[bossko]

That was my original thoughts. Plus I love the cup. Got the belts and water pump done, new cool pack as well. But it keeps getting an engine light on. Which in turn seems to reduce the power. Feels sluggish and lumpy over 4k. Seems to hesitate. Last time it came on it was the emissions. Caused by ktec sports cat. Needs garage and diagnostics I think.

 

[DaveDreads]

It'll be a Lambda sensor.

 

[Dan@SJM]

Nah pre 4k would be lambda sensor. It could be a few things tbh.