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After getting my car back a couple of days I noticed a noise (like a bracket is loose) when at 2000 RPM at a standstill, or aprox 4000 RPM when driving. Took it back to the garage and they think its a piston knocking, but I think/hope hes full of bull S##t
.can anyone help?= crumbly bits falling back into the engine- requiring a new short-block / engine.... I heard an mk3 drive past me the other day.. and could hear the engine was knocking on that as well... common fault paul ?& blocking the Cat in the centre pipe. They have removed what was left of the Honey Combe from the manifold cat & replaced the centre cat. The Knocking noise started shortly after, hens why I think something is loose on the exhaust system. Only when I stab the throttle? At the moment I am monitoring the oil levels to see how much oil is burning, too see if there maybe an internal oil leak.??& repair manual, looking at it Ive come across a Knock Sensor which states, the knock sensor is fitted to the cylinder block to detect engine knocking. This sensor contains a piezoelectric element which generates a voltage when it becomes deformed. This occurs when the cylinder block vibrates due to knocking. If the engine knocking occurs, ignition timing is retarded to suppress it. The sensor is for pinking/det. I know alot of these cars failed in the same way as yours....Usually goosed the engine 
Chris wrote:Not same Knock.
'02 facelift revision. I don't think we've seen a failed post-revision engine yet, and all of the 1ZZ-FE engines we're installing in race cars at the moment are either late, or rebuilt using late short blocks.Rogue wrote:If you can get it across to Rogue HQ I'll give it a quick listen and let you know what it's most likely to be.
Cadde wrote:I have a MR2 MK3, 2002 model just had a pre cat frailer about a week ago.
- the theory is that pre-cat failure causes dust / debris from the cat to be drawn into the other cylinders, causing damage to the cylinder bore and high oil consumption.- engine failures following pre-cat failure are caused by oil being burnt / lost and then the engine seizing when the oil is too low / gone. Cadde wrote:No too much engine noise, only intermittent noise like something is loose when accelerating.
Any advice for a novice on what to check?
Could be that a part of the new exhaust section is touching a part of the bodywork / chassis - I'd check that all the rubber dampers for the exhaust are fitted properly. / rocking the exhaust by hand when cold, and see if you can replicate the nose - and track it down from there. Could be that a part of the new exhaust section is touching a part of the bodywork / chassis - I'd check that all the rubber dampers for the exhaust are fitted properly. / rocking the exhaust by hand when cold, and see if you can replicate the nose - and track it down from there.[/quote]Captain Vimes wrote:Does it sound like this:-
http://smg.photobucket.com/albums/v288/ ... Broken.flv
... wasn't an engine swap the next step ?Cadde wrote:Hmm.
I'd try knocking
Failing that, if you're close to Patrick's place, I'd take it for him to have a quick check on.
I did try that, knocking the exhaust so think Patrick's my last hope
I'd not drive the car unless critical and get it straight to Patrick's for a professional opinion.