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#1 (permalink) |
Fresh Scooby
Join Date: Nov 2010
Location: Nairobi
Posts: 38
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I have a 2003 WRX STI that has done 50,000 Kms. Two weeks ago, I was cruising on the highway when my car lost power and started producing a ticking sound from the engine. I took it to the local Subaru garage and was told that I had rod knock. There was no damage to the engine block. The garage replaced the affected rod and put in a new piston assembly for the affected cylinder. They also put in a new crankshaft, bearings, piston rings, rocker cover gaskets, crank seal. They even put in a new water pump for good measure. They never clearly explained to me what caused the rod knock since as I was driving there was no warning light (Oil, Coolant Temp, CEL).
I got the car out after a week and drove moderately for one week. Yesterday morning I decided to go out for a drive and was doing about 140kph up a slight incline on 6th gear, at about 5000rpm when the car lost power and started emitting thick whitish smoke. Again the coolant temp was normal and there was no warning light. I immediately stopped and had it towed back to the same garage. This time, I had a blown piston (not the new one) which has damaged the engine block. Again the mechanic is not really clear on the problem and says that it may have been caused by low oil pressure. My STI is completely stock. I do not have an oil pressure gauge, only the turbo boost gauge. What caused the rod knock and later on, the blown piston after the repair? Could the garage have made an error that led to the blown piston (they're not accepting liability)? What needs to be done to solve the problem permanently? I do not have the money for a new engine. I'm in Nairobi, Kenya and the options on garages are really limited.I would appreciate the advice. |
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#2 (permalink) | |
Cool Scooby
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Re: Blown Piston after crankshaft and piston replacement
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#4 (permalink) |
Super Moderator
Join Date: Apr 2006
Location: Nottingham
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Re: Blown Piston after crankshaft and piston replacement
Rod nock, mmm, not sure what he means, im guessing bottom end nock.
sounds like what ever the origional fault was they didn't fix. bottom ends can let go for any number of reasons, but that soon after a build? def something wrong and sounds like there trying to fob you off. is there any legal action you can take? or get legal advice, did they supply the repair with a warrenty? if so i'd be claiming on that.
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#5 (permalink) |
Senior Scooby
Join Date: Jan 2010
Posts: 1,370
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Re: Blown Piston after crankshaft and piston replacement
Have to agree with tidgy. You must get some sort of warranty. I noticed that you are from Kenya. Are you getting the correct grade of fuel for you're car there?
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#6 (permalink) |
Fresh Scooby
Join Date: Nov 2010
Location: Nairobi
Posts: 38
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Re: Blown Piston after crankshaft and piston replacement
Yes, I am writing from Kenya and no, there are no clearly defined systems for warranty from garages but it is something I am pursuing. Shambles, I'm not sure about the correct grade of fuel that needs to be used on the STI but we do not have much choice here, I use unleaded premium, just like everybody else, including those with STIs and other performance cars.
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#7 (permalink) |
Cool Scooby
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Re: Blown Piston after crankshaft and piston replacement
the only other bit that cringed me a bit...is that you say it happen'd at about 5000rpm!thats only a week later after new rings etc where you not advised to keep you rpm to under 3000 for the first 500miles+??this is important as your running in new piston,rings,bearings etc mate..and you need a good oil for this period too!then changed after the running in period still preferably a good oil again..,components could have failed due to this mate..
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#8 (permalink) | |
Fresh Scooby
Join Date: Nov 2010
Location: Nairobi
Posts: 38
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Re: Blown Piston after crankshaft and piston replacement
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#9 (permalink) | |
Cool Scooby
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Re: Blown Piston after crankshaft and piston replacement
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#10 (permalink) |
Cool Scooby
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Re: Blown Piston after crankshaft and piston replacement
also mate if not all the piston rings were renewed then why not??if you do one piston you do them all on a car like that if your a professional theres no reason not to!the engine is in bits there doing the bottom end bearings,the pistons are free to pull out!you just would do them it makes sense to!
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#11 (permalink) | |
Fresh Scooby
Join Date: Nov 2010
Location: Nairobi
Posts: 38
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Re: Blown Piston after crankshaft and piston replacement
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#12 (permalink) | |
Fresh Scooby
Join Date: Nov 2010
Location: Nairobi
Posts: 38
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Re: Blown Piston after crankshaft and piston replacement
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#13 (permalink) | |
Cool Scooby
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Re: Blown Piston after crankshaft and piston replacement
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#14 (permalink) | |
Fresh Scooby
Join Date: Nov 2010
Location: Nairobi
Posts: 38
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Re: Blown Piston after crankshaft and piston replacement
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#15 (permalink) |
Cool Scooby
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Re: Blown Piston after crankshaft and piston replacement
check all the pistons mate but if they are fine then you just want to be changing the piston rings that are fitted to the pistons not the actual pistons unless they are damaged or some thing not right with them
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blown, crankshaft, piston, rod knock |
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