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Staisman

11-05-2018 10:08 AM

Black coolant passages, what to cause ?

Got this block and it has black coating like in front side of coolant passage where is water pump sits. Was wondering what would cause this and how to clean. All other passages further in the block are look clean.

https://cimg1.ibsrv.net/gimg/my350z....940e0752da.jpg
https://cimg8.ibsrv.net/gimg/my350z....8ea8cf7737.jpg

Cracka350

11-13-2018 12:47 PM

That really doesn't appear to be an issue. And if the black came off, you'd just have flush your coolant anyway. Don't worry about it.

Staisman

11-13-2018 01:05 PM

Quote:

Originally Posted by Cracka350 (Post 10976635)

That really doesn't appear to be an issue. And if the black came off, you'd just have flush your coolant anyway. Don't worry about it.

Thanks for the replay, I was just wandering what would cause something like this and the strangest thing is it's only in the front.

Cracka350

11-14-2018 11:13 AM

Quote:

Originally Posted by Staisman (Post 10976636)

Thanks for the replay, I was just wandering what would cause something like this and the strangest thing is it's only in the front.

Yeah, unless the stuff comes off easily at the touch of your finger I wouldnt worry about it.

iideadeyeii

11-14-2018 01:00 PM

oxidation i think

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