12 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH3.6L cam chain failure on banks 1-3: Causes?
Leading reported evidence
Repair can be made
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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Discussions that contain suggestions
1
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
If all debris is accounted for, a successful repair can be made.
Leading evidence: 'Repair can be made' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Repair can be made' (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.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
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1
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Suggestion · Original poster
Also, any guestimates on how much I should expect to pay to get the valves replaced since they are more than likely bent?
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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Suggestion
And if you rebuild one you need to do both so the engine will run optimally.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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Suggestion
If it was running poorly, I'd look for a spark plug that was only hand-tight, but that doesn't sound like the case.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
12 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
1 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
I'm hoping I can verify what caused it to break before I have it fixed, but before I do, I want to confirm why it failed so that it won't happen again once I have it all repaired.
All,
Curious if you guys can help me out. I have an engine that I'm hoping can be fixed. I'm hoping I can verify what caused it to break before I have it fixed, but before I do, I want to confirm why it failed so that it won't happen again once I have it all repaired.
I bought the car from someone who said while they were driving the car, it just randomly shut off. No sounds or anything. When I tried to start the engine, you could tell based on how easy of a time the starter had that there was low/no compression.
I took the engine out and took off the cam cover. The cam chain was broken on banks 1-3. I found the broken timing chain links in the oil pan. No other metal shavings in the pan. Oil looked fine, too.
I was doing some research and found two possible causes:
-The timing chain link could've failed. (
http://flat6innovations.com/index.ph...es-illustrated
)
-The scavenge pumps clogged up.
Any other possible causes I should look out for? Do I need to worry about anything thing else? Debris? I'm hoping it doesn't need a whole rebuild.
Also, any guestimates on how much I should expect to pay to get the valves replaced since they are more than likely bent? The engine is already out of the car.
Thanks in advance for the help!
You'll need to completely tear down this motor and clean it out very well.
The chain itself could have broken, or maybe the tensioner pads were worn out, some garbage in the scavenger pump also like you said could have caused the snapped chain.
I think you have to play it safe and assume you won't know what the initial cause is, only that you will need to check everything very carefully before a rebuild.
Very common failure these days.. 2002-03 3.6 engines are the worst for this..
I have proprietary master linked timing chains to address this without disassembly of the entire engine. Debris is generally contained within the cylinder head at the chain box area. If all debris is accounted for, a successful repair can be made. I have done this dozens of times.
The OEM Renold chains are poor quality, they stretch and lose rollers. I have a patent pending tool developed to measurechain stretch to help avoid this failure that's just as symptomless as an IMSB failure, but can cause even more damage.
Heres this week's broken timing chain... It was an IWIS chain from a 996TT, these are also failing at a high rate.
Do you sell the chains for the DIYer? After investing in the ims solution, low temp thermostat and oil pump drive, Id be interested in eliminating one more failure mode..
Thanks!
I don't sell any parts, we use them for procedures.
Not sure if these will ever be available, no distributors want to jump on board to sell them, and pay me to share the procedure.
Back left side of the engine bay is the water pump, and "chirping" is the sound that a composite impeller makes when it scrapes aluminum...
Could also be an exhaust leak whistling.
If it was running poorly, I'd look for a spark plug that was only hand-tight, but that doesn't sound like the case.
This is a source reference. Confirm exact model applicability in the original material.
