# Internal cleaning?

**URL:** <https://forums.speedlife.net/t/internal-cleaning/44667>\
**Category:** NYSpeed Automotive\
**Created:** [March 8, 2008, 6:38pm UTC](https://forums.speedlife.net/t/internal-cleaning/44667 "2008-03-08T18:38:10Z")\
**Posts on this page:** 1\
**Showing post:** 17

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**Author:** ![squid](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/squid/32/4984_2.png) [@squid](https://forums.speedlife.net/u/squid)\
**Post date:** [March 10, 2008, 9:09pm UTC](https://forums.speedlife.net/t/internal-cleaning/44667/17 "2008-03-10T21:09:42Z")

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CLR will work but I dunno about aluminum. Vinegar too, probably better for the Al. Home Depot used to sell a calcium/rust remover that was great. A lot stronger than CLR, but it was designated hazardous material and they don’t carry it any more. I looked at the label and the primary ingrediant was HCl acid. I bet if you went to a plumbing supply house they would have something similar to that. Again, not sure about the Al.

Oh and with the vinegar or CLR, the warmer the better, but not hot.

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