Dumb question about...
 

Dumb question about engine bay cleaning

14 Posts
11 Users
1 Reactions
637 Views
 IHN
Posts: 19468
Full Member
Topic starter
 

I'm cleaning up the twenty year old campervan to sell it, so I thought I'd give the engine bay a bit of a spruce up whilst I'm at it. I'm not talking about polishing spark plugs and getting all the bolt heads to align perfectly, I'm talking about removing the worst of twenty years' worth of oily grime.

Is it just a case of spray everything liberally with degreaser, leave for a bit, hose off? The battery is in a separate compartment so I can quite easily avoid hosing that.

 
Posted : 21/07/2025 5:12 pm
Posts: 10
Free Member
 

You would really need to work the degreaser in with a stiff brush, spraying it on, letting it dwell then rinsing off won't do much.  Just be sensible about protecting electrical components and don't use a strong jet of water

 
Posted : 21/07/2025 5:17 pm
Posts: 8909
Full Member
 

Spray on degreaser, agitate with a paint brush, use more degreaser if needed and very carefully hose off. Maybe use the  rose/plant watering spray pattern.

 
Posted : 21/07/2025 5:37 pm
 IHN
Posts: 19468
Full Member
Topic starter
 

Smashing, thank you

 
Posted : 21/07/2025 7:28 pm
Posts: 2463
Full Member
 

If everything’s working ok I’d leave it. It would let a prospective purchaser see whether there are any oil leaks. I might be suspicious of a too clean engine bay and also there is a risk of the degreaser and water actually creating problems.

 
Posted : 21/07/2025 7:42 pm
Posts: 45245
Free Member
 

+1 on leave a manky engine, to show you are not hiding a leak. 

I would clean paintwork etc to make it look better(ish).

 
Posted : 21/07/2025 8:02 pm
Posts: 5140
Free Member
 

Have you got access to a steam cleaner?

 
Posted : 21/07/2025 8:49 pm
Posts: 3489
Free Member
 

Watch what this guy does - it's pretty much what Fossy says.

 

 
Posted : 21/07/2025 9:58 pm
Posts: 12178
Free Member
 

If i opened a 20 year old bonnet i would want to see a manky engine bay... Because its 20 years old.

I would probably walk away if it was clean... Because its 20 years old so what are you hiding.

 
Posted : 22/07/2025 6:33 am
Posts: 2073
Full Member
 

I’m with Josh - nothing screams oil leak coverup like a freshly cleaned engine bay 

exception to that would be an enthusiast owned car that’s obviously been cosseted by a fastidious owner over many years, but that would be obvious from so many other aspects. A jet washed engine bay wouldn’t achieve that 

 

 
Posted : 22/07/2025 7:21 am
Posts: 34143
Full Member
 

Posted by: wheelsonfire1

If everything’s working ok I’d leave it.

Leave it alone, If I'm buying a 20 year old mechanical thing I want to see where it leaks and what it leaks, because I expect I'll be doing some maintenance. Personally I'm always a bit suss about vehicles that old that look like they've been overly cleaned - unless it's a y'know, show/concourse/summer fun thing. 

 
Posted : 22/07/2025 7:40 am
Posts: 17803
Full Member
 

Posted by: wheelsonfire1

If everything’s working ok I’d leave it. It would let a prospective purchaser see whether there are any oil leaks. I might be suspicious of a too clean engine bay and also there is a risk of the degreaser and water actually creating problems.

I concur.

 

 
Posted : 22/07/2025 7:53 am
Posts: 8909
Full Member
 

Doesn't have to be spotless. Mine was very tidy for a 22 year old car. Just occasionally went over the internal body panels/bonnet and the main areas you could see. I've done similar with my "new to me van". Some mucky bits down by the intercooler intake.  Doesn't take much to give it a wipe over to keep the dust down. I've generally kept a clean engine bay on all my cars. Just don't go near electricals, or just wipe with a cloth. 

 
Posted : 22/07/2025 9:58 am
 IHN
Posts: 19468
Full Member
Topic starter
 

The intention is absolutely not to get it spotless, we're very much talking 'a bit of a wipe down' to just get the worst off.

I get the point about looking like I've got something to hide but, to be honest, a bit of a clean can only help anyone looking to spot leaks as at the moment it's all that mucky you wouldn't spot any bits that looked any muckier/oilier than anywhere else.

 

 
Posted : 22/07/2025 10:11 am