What is my next move?
Vehicle: 1999 Boxster; 28K miles; original engine; no IMS replacement
Symptoms: No start; Turn key and hear clicking noise at starter. Starter motor does not turn. Dashboard lights dim with key at start position. Car running fine previously. Diagnosis (so far):
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Originally Posted by tt9714
(Post 15605040)
crankshaft rotates only +/- 5 degrees with all plugs out
What is the next step for diagnosis? |
Engine locked by itself. Removed starter for inspection.
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Originally Posted by tt9714
(Post 15605040)
Vehicle: 1999 Boxster; 28K miles; original engine; no IMS replacement...
What is the next step for diagnosis?
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Crank Position Sensor failure?
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Originally Posted by tt9714
(Post 15605040)
Vehicle: 1999 Boxster; 28K miles; original engine; no IMS replacement
Symptoms: No start; Turn key and hear clicking noise at starter. Starter motor does not turn. Dashboard lights dim with key at start position. Car running fine previously. Diagnosis (so far):
If the engine is truly locked then you need to verify the starter is not stuck engaged. If it is not then don't bother draining the oil or removing the pan or inspecting the bores. If engine is locked up and there is not an external explanation for this: Stuck starter, a transmission not in neutral, the engine has to come out of the car and the engine torn down to determine what caused the engine to lock up. A broken cam chain, a snapped cam, something internal and something major and something expensive to address has gone wrong. If the engine is not locked, that reads like power to the starter solenoid is not good and the clicking is the starter solenoid moving back and forth but not making it far enough to activate the starter. If you are sure about the battery being good -- and they can "look" good but when called upon to produce the electrical power necessary to start an engine show their true condition -- then I would suspect the power/ground connections between the battery and the starter and the chassis are suspect. |
Originally Posted by tt9714
(Post 15605040)
Vehicle: 1999 Boxster; 28K miles; original engine; no IMS replacement
Symptoms: No start; Turn key and hear clicking noise at starter. Starter motor does not turn. Dashboard lights dim with key at start position. Car running fine previously. Diagnosis (so far):
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Did you have the warm start issue before? By this I mean the car would have difficulty cranking after the engine was warm? The starter/generator wiring harness on early 986s were too small and a thicker upgraded harness is now available.
https://rennlist.com/forums/997-foru...when-warm.html From the 997 forum but applicable to 986 |
lights dim and starter clicking sounds like a bad battery to me. how many volts is the battery producing?
it wouldn't explain why you can't rotate the engine. I'll defer to more knowledgeable minds on that one |
My opinion is you have something broken inside the engine--a rod or rod bearing? Or a timing chain? Or a IMS bearing failure.
Time to pull the engine and investigate ant then decide whether to fix/replace the engine. One of those situations where it really helps to be an adventurous DYI'er. Sorry, sorta been there, done that. The pain in the wallet still is giving me trouble--or is that a back ache? |
Thanks everyone for your feedback and comments.
UPDATE TODAY:
I assume first step is transmission removal to inspect clutch and IMS area? |
I would drop the pan and see what treasures await you! And please include pics.
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My guess is a stuck valve. |
Originally Posted by tt9714
(Post 15607843)
Thanks everyone for your feedback and comments.
UPDATE TODAY:
I assume first step is transmission removal to inspect clutch and IMS area? If the engine can't be rotated there is something horribly amiss inside the engine. You are not going to find and fix this with the engine is the car. |
How the hell could a car go from 'running great, parked it' to 'seized motor'? That's insane.
28k miles on a 20 year old car? That's also insane. Nowhere near enough exercise... |
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