I have a 2010 rs and Need one of these asap, sadly. My engine rods and pistols are bent. Not sure it's repairable.
Have commented on your other thread, should be cheaper and better to repair your engine, it can be a lottery buying a second hand performance engine imo.
Thanks mate. Just replied. If you know any engines in and around the Midlands let me know as I'm in birmingham.
I was on the motorway hit a patch of water. Engine revved a little. I got the error p0234 turbo overboost. "Check injection". Fast forward a month, Car had been misfiring a bit. I was on the dual carriage way last Thursday maybe doing about 45 in 3rd gear. All of a sudden I heard this knocking noise. Didn't loose any power or such. Took it to a local garage the same day he thought it was the lifters or Pistons but the noise was that loud and seem to calm down after a oil and filter change. The oil looked clean too. I mi went to the garage and they had removed the head, rolled the car and showed me the Pistons weren't lining up at the top so assumed it was a bent/broken rod? im not sure if it's worth fixing or replacing the engine.
I'd imagine it'll be cheaper to fix since its already in bits. Take it you're running an injen or ITG induction kit?
Car is standard mate. Nothing's been changed on it. If I fix. What are the chances it happening again? Maybe the damage isn't that bad and just the rod need changing? Or am I being optimistic.
Still don't understand how it bent the rod, if your cranks ok then it should be ok to repair but you need to find out how it happen so it don't happen again, where in bham are you and can you still start the engine? I woulnt mind having a look and giving a second opinion, I've worked on older performance engines, newer engines are a pain in the ass
The cars near the baggies ground. I was driving around from thursday till Monday with the car. It just had that annoying knocking noise. Car starts fine. Drives fine which is a bit baffling really. Where abouts are you wmrs?
I'm in yardley mate near the new tesco, does sound strange tbh a bent rod will cause the engine to be missing and letting unburnt fuel to pass the exhaust valves
The engine is missing. But drives fine I didn't see an increase in fuel usage. But the Pistons werent levelling up at the top. Also it was missing before i got tapping noise.
By the sounds of it you will have sucked water through the air filter and into the cylinder/cylinders and that's what has bent the rod. By how much were the piston tops out?
What wouldve caused that boardy? I didn't drive through any floods. Pistons are out by a few mil meters
Just with you saying you hit water, if it was hot that deep then maybe not? Was it just the one piston that was lower than the other 3
I was thinking a mini hydrolock too when water was mentioned, but then Sparta said it's standard. Where's the intake on a mk3 How much water did you drive through? Did loads splash up when you went through it? What actually happened as I'd read your thread before about the overboost error, but I don't remember reading anything about water in that?
There was a little water on the motorway. Car slight aquaplaned and revved up then the error came one. There was no noise for a month.
Not sure where the intake is located? Drive a r26 myself. I think you could get a overboost error from ingesting water, think it could cause the compressor to stall a bit as it passes through the turbo then over spool as it recovers? It's going to mess with boost pressure regardless!
You would have to suck up a fair amount of water to bend the rod and the mk3 rs has the filter at the top right near the windscreen with a pick up below it, don't see how It can suck up water to be fair unless you went through an actual flood, diagnosing a bent rod can be tricky, I don't know if our pistons are concaved and build up of carbon or pits can cause wrong readings too, best thing mate is if you can meet up and I can have a quick look plus I'm not far from fred@btm he's the best person in bham to speak to
I've just been told that the car Deffo needs a new engine as the Pistons started carving in. The car in in west Bromwich. IF anything you would need to come there. I'm just trying to source an engine now. Im not sure if the error was the start of things. The error, the misfire then the rods/ Pistons. I'll get some pictures
My mate bent a rod in a merc sprinter driving through a puddle trying to soak people on the pavement, yes he's a tit! Pitting or a build of of carbon on the piston crown is not going to give you a discrepancy of a couple of mil at tdc. Providing you use a dti on a clean section of the piston and it's in the same place on all 4 then this is more than ample. But if the crown of the piston is burning away this points fuelling. pre detonation from under fuelling etc
Here's the Pistons.. 1-4 left to right. Piston 2 looks the most damaged the same cyclinder that was misfiring. Co-incidence? Im going to replace the engine but how do I stop this happening again?
If your replacing the engine it shouldn't happen again if it was an intrinsic fault with your engine, thats why i originally suggested replacing your engine if you couldnt find a cause. I cant really tell from the pic but are they all slightly distorted? I can see 2 + 3 are definately bent and i thought there may be a slight bend in no 4?
As boardy said, what do the crowns of the pistons look like? any sign of detonation? When it "revved up" on the motorway did you hit the limiter or anything, not over revved it when changing down?
Also if your taking pictures of the piston crowns have you got a picture of the inside of the big end shells?
The crowns appear fine. When it revved on the motorway it can't have gone more than 4k rpm. It was only a small puddle, the car aquaplaned rather than splashed if you get me.
Sounds very strange what has happened to your car. Really feel for you. Have a look at engine dynamics they do forged engine rebuilds. I think that is the route I would go down if I were you.
Thanks mate. I think that would cost a lot more than getting an engine? The crown was starting to rub in the cyclinder.
Depends if you can get hold of one. Are you going try get Renault to stump up something towards a new one?
I speak directly to Renault uk and explain what has happened. I'm guessing they would want a Renault dealer to look at it though before contributing anything.
yes using a DTI will give accurate results but most garages use a rod to measure piston travel where you can get a few mm difference either way I'd recommend a new engine, got a feeling crank will be scrap
