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Under bonnet black substance


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Hi everyone! 


Would anyone happen to know what this black tar like substance is under the bonnet of my 18 plate nismo?  

It's is on the passengers side right at the back.


Thanks in advance! 




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Mine wasn't quite that bad (mk1 370 nismo)- is it just a nismo thing?? however, after spending 1) a small fortune on cleaning products, and 2) several hours using said products on the exterior, its time to look at cleaning under the bonnet. I had a quick clean yesterday, but having just got home today-(the engine bay is still warm) i swiped my finger through the marks and they smeared just like when you use tar remover. not sure what it is tbh. i will try some tar remover on it and let you know.



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