Hello all, I unfortunately I just found out the hard way that Purple Power is not good for cleaning aluminium parts, so I thought I should post my experience for those who don't already know this.
Long story short, I just finished doing a couple minor repairs and upgrades to my K24A2 swapped sleeper Civic (added OEM oil cooler, changed VTC solenoid O ring, changed thermostat) and ended up getting oil on the subframe, timing cover, block, aluminium oil pan, etc. While I was at the auto parts store, I picked up a bottle of Purple Power to clean my mess up since I have used it years ago with good results. With the engine barely lukewarm, I sprayed down the right side of the engine in the areas I make a mess of and let it soak for a couple minutes before thoroughly rinsing it off with my garden hose.
Once the water dried, I noticed that there was a white residue on the timing cover and oil pan. Thinking I just didn't rinse it thoroughly the first time, I rinsed it again for several more minutes but the residue was still there. After a quick Google search, it looks like Purple Power is known to corrode aluminium. I will try to get pictures of the corrosion tomorrow. Fortunately in my case the corrosion seems fairly minor and is mostly not in particularly visible areas, so it doesn't bother me much. I did, however, spend about 20 minutes rinsing off EVERYTHING in the engine compartment from every angle possible after finding out what Purple Power does to aluminium just in case of overspray, splashing, etc. Probably overkill, but better safe than sorry.
The odd thing is I have used Purple Power on aluminium parts in the past and never had this happen, but I haven't used it in years because I found another product that seems to work just as well for a fraction of the cost and is very safe on aluminium, but my local dollar store has been out of stock for a while. Perhaps the difference is that the engine was slightly warm this time, but it was nowhere near hot. I'd estimate it was probably around 100 degrees if that. I'm thinking they may have changed their formula since I never had this happen before and it smells different than I remember it smelling before, but that's just speculation.
Anyways, I hope this information helps prevent someone from having a very bad day. In my case the results fortunately weren't so bad, but I can't even imagine the kind of damage spraying down the whole engine compartment could have caused as much aluminium is used on cars these days. I'd love to hear any thoughts and similar experiences.
Long story short, I just finished doing a couple minor repairs and upgrades to my K24A2 swapped sleeper Civic (added OEM oil cooler, changed VTC solenoid O ring, changed thermostat) and ended up getting oil on the subframe, timing cover, block, aluminium oil pan, etc. While I was at the auto parts store, I picked up a bottle of Purple Power to clean my mess up since I have used it years ago with good results. With the engine barely lukewarm, I sprayed down the right side of the engine in the areas I make a mess of and let it soak for a couple minutes before thoroughly rinsing it off with my garden hose.
Once the water dried, I noticed that there was a white residue on the timing cover and oil pan. Thinking I just didn't rinse it thoroughly the first time, I rinsed it again for several more minutes but the residue was still there. After a quick Google search, it looks like Purple Power is known to corrode aluminium. I will try to get pictures of the corrosion tomorrow. Fortunately in my case the corrosion seems fairly minor and is mostly not in particularly visible areas, so it doesn't bother me much. I did, however, spend about 20 minutes rinsing off EVERYTHING in the engine compartment from every angle possible after finding out what Purple Power does to aluminium just in case of overspray, splashing, etc. Probably overkill, but better safe than sorry.
The odd thing is I have used Purple Power on aluminium parts in the past and never had this happen, but I haven't used it in years because I found another product that seems to work just as well for a fraction of the cost and is very safe on aluminium, but my local dollar store has been out of stock for a while. Perhaps the difference is that the engine was slightly warm this time, but it was nowhere near hot. I'd estimate it was probably around 100 degrees if that. I'm thinking they may have changed their formula since I never had this happen before and it smells different than I remember it smelling before, but that's just speculation.
Anyways, I hope this information helps prevent someone from having a very bad day. In my case the results fortunately weren't so bad, but I can't even imagine the kind of damage spraying down the whole engine compartment could have caused as much aluminium is used on cars these days. I'd love to hear any thoughts and similar experiences.