Inlet manifold issue

[R32crew]

Hi guys…

About 14/15 months ago my CT200h was making a knocking / juddering noice whilst driving on low RPM’s.

After investigation it was coming from the inlet manifold.

I was told a good clean will solve the issue.

So I took off the manifold it was full of water dirt oil etc.

After a good clean it’s been fine for the last 15 odd months but now the same noise is back.

Should I get it off & clean it again or should I replace it this time.

Has anyone come across the same issue & had theirs cleaned twice ?

Cheers.

[diabolik]

Oh noes. Sounds like the dreaded head gasket issue coming to our UK land aswell.

Let's start with what's the mileage and is it worse on cold morning starts?

[R32crew]

5 hours ago, diabolik said:

Oh noes. Sounds like the dreaded head gasket issue coming to our UK land aswell.

Let's start with what's the mileage and is it worse on cold morning starts?

Hi mate.

Milage is 140k but it’s regularly serviced & well looked after.

The sound is just there whilst it’s on petrol mode hot & cold.

And it’s deffo not the head gasket there’s no mixing of oil & water plus like I mentioned 14/15 months ago when I cleaned the inlet it was fine.

Its 100% the same inlet noise 

[R32crew]

And the noise isn’t there on cold start 

It will only make the noise between 1500 & 2000 RPM’s 

Before & past them RPM’s no noise at all

[ColinBarber]

On 1/10/2022 at 12:53 PM, R32crew said:

Should I get it off & clean it again or should I replace it this time

Clean it and the EGR / pipes. The manifold itself doesn't need to be replaced if it can be fully cleaned. Possibly replace the PCV valve too.

There are a good set of videos here:

https://priuschat.com/threads/nutz-about-bolts-prius-maintenance-videos.162289/

 

[R32crew]

10 hours ago, ColinBarber said:

Clean it and the EGR / pipes. The manifold itself doesn't need to be replaced if it can be fully cleaned. Possibly replace the PCV valve too.

There are a good set of videos here:

https://priuschat.com/threads/nutz-about-bolts-prius-maintenance-videos.162289/

 

Ok 

thanks mate 

will give it a try 

cheers 

[northernstar]

 

My F-Sport does this knocking sound in the winter when it’s not been used for a week or so. Sounds like a bag of spanners when it starts up. Quite disconcerting.

[R32crew]

On 1/18/2022 at 9:50 PM, northernstar said:

 

My F-Sport does this knocking sound in the winter when it’s not been used for a week or so. Sounds like a bag of spanners when it starts up. Quite disconcerting.

Yes mate mine did that before the first clean out 

At first I thought it was engine knock thank god it wasn’t 

Get your inlet manifold plus the EGR cleaned should solve the issue