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Premium Member
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Discussion Starter · #1 ·
Hi All,

My engine bay is looking a bit gruppy and the manifold has a few rust looking patches. I was going to just take the jet washer to it but thought I should ask about first before doing any damage.

So how do you clean your's?
 

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Premium Member
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12,688 Posts
I would not jet wash it, or if you do be very very careful. Water in electrics don't mix. Use a detailng brush with some APC. Old rags etc, then wipe over the platic covers etc with a trim restorer or similar.
 

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Premium Member
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15,527 Posts
I covered up all the electrics with some bags/cling film the used meguiars degreaser and agitated all the crap off with small brushes. once i was happy i blasted it all off with my pressure washer. i then removed the bags etc and dried everything with microfibre cloths and had the engine running to aid drying. I applied autoglyms bumper care to all plastics. I did have a thread in the cleaning section with pics but for some reason the pics have been removed, hope this helps.;)
 

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Civinfo Wind Up Merchant
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2,472 Posts
Open Bonnet > Jetwash > Close Bonnet :p

If you're careful not to 'blast' near electronic components you'll be fine, stay a distance away so the overall force is less aswell


If you want to go mad you can get all your plastic cleaners etc and do a thorough job, but it's a rarity anyone see's under my bonnet; so i dont waste my time :worms:
 

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Premium Member
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Discussion Starter · #5 ·
Cheers guys to cold to mess around cleaning it at the moment but will definatley give it a whirl when it gets a bit warmer.
 

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Premium Member
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15,644 Posts
Pressure washing under the bonnet
Cover the electrics with cling film to a warm engine to aid evaporation
Use a degreaser with a detailing brush
Then carefully give short bursts of the pressure washer to small areas at a time.. Don't flood it..Then keep the engine running a while and use an old MF towel to dry
Then spray/wipe with a Product like Aero 303 to reseal the parts cleaned
Stand back and admire
Here was my Civic Engine, + & minus its cover:

 

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Premium Member
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It's probably worth mentioning in addition to Robbo's excellent guide, that you might want to just check and re-grease any linkages after degreasing the engine bay.

I use Robbo's method and have never had a problem using the jet wash. Just let it dry before trying to start and cover your electrics.

I also have some commercial engine bay shine, a detailing friend of mine gave it to me so I'm not sure what it is but Aero 303 should be fine also.
 

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Premium Member
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15,644 Posts
It's probably worth mentioning in addition to Robbo's excellent guide, that you might want to just check and re-grease any linkages after degreasing the engine bay.

I use Robbo's method and have never had a problem using the jet wash. Just let it dry before trying to start and cover your electrics.

I also have some commercial engine bay shine, a detailing friend of mine gave it to me so I'm not sure what it is but Aero 303 should be fine also.
Here you go:
303 Products Aerospace Protectant (16oz) - Shinearama
 

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I would have thought most of the electrical connections have weather seals to prevent water/ moisture getting in? Am I wrong? :confused:

Apart from the battery and earth straps obviously.
 

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Premium Member
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You're partially right. If you train the pressure washer on electrical parts like the alternator, no amount of weather proofing is going to protect it..Be cautious and don't blast merrily away and you'll be fine!!
 

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#MrGrumpy
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13,117 Posts
I would have thought most of the electrical connections have weather seals to prevent water/ moisture getting in? Am I wrong? :confused:

Apart from the battery and earth straps obviously.
Considering that I've burned myself on a pressure washer before (whilst being a tit, admittedly), I would be surprised if the moisture seals would offer much protection!
 

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Moisture seals on your connectors will give protection from general overspray, but from a direct jet from close range they wont give much protection at all. They are designed to keep out water in situations where they get splashed or perhaps rained on, but not from high pressure water jets.

I think if you are careful you probably won't do any harm jet washing your engine, though judging on the cleanliness of the inside and outside of my car, I doubt my engine bay is going to get a look in any time soon :p
 

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Cockup Specialist
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12,885 Posts
Thanks for the advice..gonna have to tackle this when things warm up.
Never knew the best way to go about it though.
 

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FESTOOLIGAN
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4,166 Posts
Apc or degreaser, a brush, some mf and a plastic dressing is all you need. No need of water in engine bay.

I treated mine with surfex and a valet pro brush
With an mf wiped the degreaser
Seal the metal surfaces with collinite 845 and bonnet inside
All the plastics dressed with Wolfs Nano Trim
Bonnet soundproofing carpet cleaned with apc











 
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