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Discussion summary
YOUR RESEARCHThink my 3.6's engine has died :(
Leading reported evidence
Replace oil every 6,000m
Performed · outcome unconfirmed
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Performed · outcome unconfirmed · Original poster
The car has a full Porsche history and has done 80,000m and I've changed the oil every 6,000m
Leading evidence: 'Replace oil every 6,000m' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check crankshaft' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion
Check that connecting rod for straightness and check the crankshaft for cracks.
Replace valves and valve guides or do you typically have
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Suggestion
Is it simply replacing the valves and valve guides or do you typically have to do some machine work to salvage the cyl.
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Suggestion
It might run long enough to increase the multiple catastrophic internal damage of total self destruction.
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Chaps my engine is in big trouble.
I was driving at 3mph the other day and it started making this noise:
Porsche 911 (996) with broken timing chain. - YouTube
I've taken it to an indi specialist, who thinks that the bank 2 timing chain has snapped causing a damaged head, bent valves, possible block damage etc....
Its going to be removed next week and stripped, but I've been told it's likely to cost over �7,500 ($12,000).
I'm gutted as I've recently spent �4,000 ($6,000) on it with new suspension, IMS, RMS, Clutch and a X51 exhaust.
The car has a full Porsche history and has done 80,000m and I've changed the oil every 6,000m
I thought if the timing chain had snapped it would not run. What do you think?
It might run long enough to increase the multiple catastrophic internal damage of total self destruction. Engines are powerful, even if it only runs on bank 1, while destroying every engine component of bank 2. Sorry for your loss.
Could be a chain easily. The engine has 3 chains, one for each bank, driven from the IMS and one from the crank to the IMS.
If one of the main chains driving the cams breaks, the engine will run on 3 cylinders, as one side maintains valve timing.
I have master linked timing chains that allow for this work to be done preventatively, but also this allows a repair to be done without complete engine disassembly, which is the case with all other, noon master linked chains. You probably do have ben valves, but the pistons are probably ok. We see more and more timing chain failures today.
Don't even think about starting it up again, you are spreading collateral damage like the plague inside that engine by doing so.
Its easy to diagnose a broken chain, pull the green cam timing plugs and rotate the crankshaft pulley by hand. If the cams don't turn, the chain has failed, or the IMS has become separated.
If the pistons survived but the valves are bent, Is the head usually serviceable? Is it simply replacing the valves and valve guides or do you typically have to do some machine work to salvage the cyl. head?
Turned out my valve liner had slipped (poss overheating in the past) locked the valve, which broke the head, and damaged piston 5 and the liner. It will cost around �9,000 ($13,500) to re-build with a new head.
So I've managed to secure a low mileage 3.6 engine complete with ancillaries which has had the bores tested etc and is supplied with a warrantee which should get the old girl back on the road for a few thousand less. Also I get to keep the old engine to sell for parts. Can't wait to drive it again.
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Take it completly apart and sell what is good. The crankshaft, main bearing carrier and one cylinder head should be easily sellable. Heck if the intermediate shaft is still intact sell that too. Then there are all the accesories too.
Here's the damage.
Valve pushed into the head - ouch!
Damaged piston and broken sleeve.
On a positive note the new engine is having its IMS replaced and is being prepped for installation.
Did the valve seat fail? I can't tell from the pics, but this is the typical failure when this occurs.
The collateral damage probably hasn't stopped there.. Check that connecting rod for straightness and check the crankshaft for cracks.
On my engine they think a valve seat might have dropped and causes my broken valves, however disaster happen at the track with no warning whatsoever. The engine was running strong upto that point. Does valve seat just drop on these heads?
New engine is in and running like a dream.
I've started to put some of the old engine parts on ebay if anyones interested.
http://www.ebay.co.uk/sch/redbull916...1&_ipg=&_from=
