What is the best method of cleaning a grimy dirty undercarriage?

>>17531455
Pressure washer then spray it with soapy foam then rinse it off?

Acid

>>17531460
This pretty much, a lot of pressure washers have have soap nozzles and mixtures you can put in as well that help.

>>17531460
>>17531533

What PSI? I have a 1500 PSI pressure washer, is that too low?

>>17531548
1500 is fine you really don't want anything above 2000 spraying on parts anyways as it can damage shit.

Stay further back than 6ins spraying on sensitive parts like brake lines.

>>17531560
thx anon. Should I spray a degreaser/prep chemical and let it soak before?

>>17531455

you just know that diff is full of mud

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How bad are drive through car washes?

>>17531602
Horrible if you have anything nice and don't want the paint scratched. Not so bad if its like OP's Pic.

>>17531602
They do nothing for undercarriage, for the most part, but for paint that's actually in good condition it's terrible depending on your colour/paint type.

White - who cares. Black - Swirl city baby.

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>>17531602

You're better off going to one of those pay n spray pressure car wash places, if you don't have a place to do it at home.

It sucks for me because I have a driveway, garage, hoses, etc. but I'm on well water, and it's very hard water. It usually dries off the vehicle before I can get to it, leaving shitty water spots and residue.

So I go to a pay n spray car wash, usually on a Friday or Saturday night around 7-8PM. There's never any lineups, and only a few people washing cars, so I can bring a bucket, brushes, and all my shit and just leisurely wash my car there.