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Discussion summary
YOUR RESEARCHMy theory on coil packs cracking. Whadayathink?
Leading reported evidence
Install properly
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0
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1
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Read evidence and context
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Also make sure the connector boot is good and installed properly.
Leading evidence: 'Install properly' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Install properly' (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
I never understood why people replace their coils when they can be perminently sealed in so many ways, whether it is by spraying a flexable coating on them or installing a thin protective film on them or even coating them with a vinyl protectant.
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Suggestion
You can remove the packs with your bare hands even after the cars has been run all day long.
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Suggestion
however there are many types of plastics and I am sure that knowing what type of plastic is being used would help diagnos this thought.
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Suggestion
I never understood why people replace their coils when they can be perminently sealed in so many ways, whether it is by spraying a flexable coating on them or installing a thin protective film on them or even coating them with a vinyl protectant.
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15 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
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Generation: 20261026T105141Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Engine is hot, coils are hot.
Then, you pass over water puddles and cold water splashes in between the heat shields and onto the hot coil cracking the plastic.
The coil packs is really susceptible to water exposure due to being close to the ground unlike "V" and "inline" engines.
Discuss.
Yes, although I think the majority of coil pack damage is simply from the heating and cooling cycles. Porsche is not the only one. My mom's Jag and Mercedes both had the same problem. The newest version for the Cayenne (they all fail on the Cayenne's on a V) has some sort of silicone rather than plastic. I assume it's to help with expansion / contraction.
I am not an engineer....
however there are many types of plastics and I am sure that knowing what type of plastic is being used would help diagnos this thought. If the plastic is fragile (like polycarbonite) then perhaps but if it is more ductile (like some nylon base) then I dont think so. Many plastics are thermally more stable than metals and have lover TCE's (thermal coefficient of expansion).... SO perhaps the metal expands more than the plastic housing and there inlies the trouble if there is not enough room for it to expand... it CRACKS...might not show up when new because when the plastic is heat cycled/ and over time it might become more brittle....
my $0.02
I never understood why people replace their coils when they can be perminently sealed in so many ways, whether it is by spraying a flexable coating on them or installing a thin protective film on them or even coating them with a vinyl protectant. This is standrad practice for electrical cables and wires, distributers, etc, so why not the packs?
Apparently you missed the movie "The Graduate"
My hypothesis agrees with above comments...it is the interaction of materials with different CoE that breaks the polymer chains (cracks)
As far as the heat effect....the packs don't get very hot to begin with. You can remove the packs with your bare hands even after the cars has been run all day long. Also make sure the connector boot is good and installed properly.
Not on a coil pack but on the voltage regulator on the alternator. I broke one of the plugs off. It held very strongly for the little bit of surface I had to bond to.
Torque value on the retaining bolts of the coil packs is
only
84
IN
-Lbs or
7
ft-lbs. or 9.6 Nm
I would put a light coat of hi-temp thread lock to ensure they dont back off from vibration from all of you hi-rpm drivers
