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Old 09-23-2022, 06:34 PM #16
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And whatever you do, do not spray water on top of the engine. It will find its way inside the spark plug tubes and can cause rough idling/misfires. Even though the tubes have a rubber gasket/seal up top.. they don't seal very well for copious amounts of water as you'd have when rising off. YMMV

Water everywhere else is ok (except alternator).
How does one clean the valley between the valve covers?
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Old 09-23-2022, 07:34 PM #17
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How does one clean the valley between the valve covers?
Carefully? LOL

Not sure.. mine didn't need any special cleaning really. Did wipe down stuff before I installed my S/C , but it really wasn't covered in any grime to speak off (just mostly dust).
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Old 09-23-2022, 08:29 PM #18
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I have used simple green for decades with NO adverse effects.
270 k miles and it still cleans up nice.
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Old 09-23-2022, 09:26 PM #19
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I have used simple green for decades with NO adverse effects.

270 k miles and it still cleans up nice.
I might try the Simple Green Pro HD. Says it's safe for metals, including Aluminum.

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Old 09-23-2022, 11:23 PM #20
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I admit, I never knew about Simple Green affecting aluminum... but I guess I just never got around to cleaning bare aluminum with it.

Good to know about that though. I've used SG for pretty much everything else in my life, lol.
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Old 09-26-2022, 02:47 PM #21
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I admit, I never knew about Simple Green affecting aluminum... but I guess I just never got around to cleaning bare aluminum with it.

Good to know about that though. I've used SG for pretty much everything else in my life, lol.
The aluminum damage happens if you soak it for a long time or leave it on metal without washing it off. I've cleaned many engines with it without any aluminum damage - but just make sure you do a good job rinsing.

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