Engine Wash

Engines and Engine Systems
Post Reply
User avatar
izakjbrt
Senior Member
Senior Member
Posts: 319
Joined: 14 Apr 2018 19:02
Full Name: Izak Joubert
Nickname: Izak
Home Town: Pretoria
Current 4x4: 2007 Patrol 4,8 GRX (PA-trol)
2012 Patrol 4.8 GRX (MA-trol)
Home Language: Afrikaans
Has thanked: 157 times
Been thanked: 57 times

Engine Wash

Post by izakjbrt »

Morning all, not so much a patrol engine question, but rather how to get my patrol engine to a clean/prestine condition. After playing in the mud this past weekend, the car looks like the room of my youngest, even inside, mud everywhere (lucky for seat covers). Interior and exterior wise, I can wash most things and be fairly certain that it'll still work afterwards. Except the engine.

I have heard way to many horror stories about engine washes and I've experienced a few (the last steam clean screwed up my pioneer radio completely).

So how do you wash the engine on a 4.8 so that it starts again afterwards (I assume I don't just blast it with the Karcher?
2007 Nissan Patrol 4.8 grx

graham1
Patrolman
Patrolman
Posts: 522
Joined: 15 Jun 2015 17:46
Full Name: graham robertson
Nickname: graham1
Home Town: Harties
Current 4x4: 2004 Patrol 4.8; 1999 Patrol 4.2D
Home Language: English
Has thanked: 8 times
Been thanked: 76 times

Re: Engine Wash

Post by graham1 »

izakjbrt wrote:
19 Jan 2021 10:05

I have heard way to many horror stories about engine washes and I've experienced a few (the last steam clean screwed up my pioneer radio completely).
Ive also heard way too many, and because of this, I have never washed any engines before. They can rather stay dirty and work.
The most ive done before is use a wet rag and wipe where ever I can reach with it, but ya, I was very bored that day.

User avatar
Oetie
Senior Member
Senior Member
Posts: 283
Joined: 13 Jan 2014 15:21
Full Name: Leon Fouche
Nickname: Oetie
Home Town: Rooihuiskraal, Centurion
Current 4x4: 2009 TD42T Patrol
Home Language: Afrikaans
Has thanked: 288 times
Been thanked: 97 times

Re: Engine Wash

Post by Oetie »

I am open for advise and correction from the more experienced people, but what i have done to date (mostly diesel engines' apart from my daughter's Getz) is to spray the engine with clean green or some kind of degreaser that my wife buys at a soap shop, and then rinse with the hose pipe with the orange garden thingy-majic at the front controlling the strength of the water stream, not as a full force stream but more a spray while the engine is running.
One life, live it to the fullest!!
ORRA - L65
HAM - ZS6LEF

Tlou - 2009 Patrol TD42T

User avatar
Rhett
Patrolman
Patrolman
Posts: 553
Joined: 26 Jan 2016 14:48
Full Name: Rhett van der Stelt
Nickname: Rhett
Home Town: Heidelberg
Current 4x4: 2004 Nissan Patrol 4.8 GRX
1980 Toyota Land Cruiser HJ47
Home Language: English
Location: Heidelberg
Has thanked: 177 times
Been thanked: 79 times

Re: Engine Wash

Post by Rhett »

This is definitely an "attempt at own risk" thing. Wash only when needed...

I clean my engines with the high pressure washer, however I turn pressure down low, so a garden hose with a shower rose on the end will work too. Avoid spraying directly on areas like dipsticks, seals, distributor (if you still have an old school rotor one), ECU.. and on the firewall where water could penetrate into the cabin through the grommets. Also avoid the insulation on the bonnet if the car is aging, the extra weight of the absorbed water is what ends up making the stuff sag and fall apart.

I also let the engine run before hand and get up to operating temps. My theory is that the heat will evaporate water out of crevices and catch points quicker.
Don't worry about cracks and such from change of temperatures if the engine is hot. You shouldn't be putting near enough volume of cold water on.

If you're worried about electronics, put a checkers packet over things like the fuse box, ECU and other aftermarket items which wouldn't have correct insulation.

Lastly, I leave the bonnet open, and in direct sun to dry as much as possible.

So far, touch wood, I have never had any issues. Just play it safe.
Rhett
https://www.youtube.com/channel/UC9e98c ... XUyixKJavQ

Nissan Patrol 4.8 GRX
Toyota Land Cruiser HJ45

User avatar
Peter Connan
Moderator
Posts: 6415
Joined: 10 Sep 2010 07:21
Full Name: Peter Connan
Nickname: Piet
Home Town: Kempton Park
Current 4x4: 1996 Patrol 4.5SGL
Home Language: Afrikaans
Location: Kempton Park
Has thanked: 776 times
Been thanked: 714 times

Re: Engine Wash

Post by Peter Connan »

I was taught to keep the engine running while doing the cleaning, and used to pressure-wash my petrol engines like this without ever experiencing any issues apart from the fact that it washed the labels off the batteries. Leave them running afterwards until they look dry.

Must say, that's one of the nice things about the TD.
Mag ons ons kenniskry met lekkerkry aanhoukry.

User avatar
Dungbeetle
Senior Member
Senior Member
Posts: 179
Joined: 28 Jun 2009 08:46
Full Name: Rudolf
Nickname: Dungbeetle
Home Town: Ellisras
Current 4x4: 2000 Patrol 4.2GL Wagon old and wise at 851 000 km
2014 Patrol 3.0GL CRD reaching puberty at 113 000 km
Home Language: Afr
Has thanked: 25 times
Been thanked: 38 times

Re: Engine Wash

Post by Dungbeetle »

To me an engine must be kept clean on the inside via proper service intervals. There absolutely no gain to keep the outside clean...

So I just don't do it. .

And I will probably commit murder if I catch someone with a pressure washer under my bonnet
2000 Patrol GL 4.2D - Still strong after
Eight Hundred and fifty and counting THOUSAND KILOMEEEEEEEEEEEEEETERRRRRRRRRRRRRRRRSSSSSSSSSSSSS

User avatar
Tinus lotz
Moderator
Posts: 8254
Joined: 29 Aug 2010 13:07
Full Name: Tinus lotz
Nickname: Tinus lotz
Home Town: Centurion
Current 4x4: Nissan patrol 4.8 GRX 2005

Toyota 2.7 legend 35 LWB 4X4
Home Language: Afrikaans
Has thanked: 764 times
Been thanked: 490 times

Re: Engine Wash

Post by Tinus lotz »

Take egine cleaner and a 50mm paint brush.if you get a stobbon area apply again . Then wash again ..repeat until clean wash soap of properly it eats suff if you leave it

Pieter B
Patrolman
Patrolman
Posts: 696
Joined: 29 Sep 2014 12:40
Full Name: Pieter Botha
Nickname: Pieter
Home Town: Alberton
Current 4x4: '05 Patrol 4.8 GRX
Home Language: Afrikaans
Has thanked: 5 times
Been thanked: 83 times

Re: Engine Wash

Post by Pieter B »

I took the big plastic cover off once to give it a clean. A week after the wash I picked up a missfire. It turned out I got some water into 2 of the plugholes. Needless to say that I sommer did a plug change at that point as you have to dismantle the whole engine to get to the offending plugs. After that I never took the cover off again and have not had the problem again

Post Reply

Return to “09. Engines”

Who is online

Users browsing this forum: No registered users and 5 guests