wet sanding the z4/ detailing engine

Thanks cueball that was a really informative read through - I had no idea it was so technical! Impressed again. . . nice one.

Worth it for those fantastic results.

:driving: :thumbsup:
 
ok a little updated haven't done any more on the wet sanding, but as this is a detailing post thought i would pop it in here.
So the Mrs was at work this weekend so I had the day to play on the zed. I'd already removed some of engine bay parts to gain better access to the hard to reach areas, so i got under the car and cleaned / degreased the gearbox and sump, this will be repeated twice before I painted and detail the box and sump / lower part of the block ect, if the weather is dry tomorrow i will be doing more cleaning under the car :D

before: (didnt get any pics of the degreasing stage)
85EE-22EA453664AF-154-00000007B53E14DE_zps40765591.jpg

After:
9BFE-309FB127E8BE-154-00000007D8BA731C_zps79487c26.jpg
9ADA-288DADA1FC9F-154-00000007E3219FE6_zpsb22dd99e.jpgstill got a lot more to do :|

a general one of the engine bay/ of the car:
B5BC-1973702341CA-154-00000007F21D03D0_zpsafde76e4.jpg
B776-57CEE7FCCB3C-154-0000000C0555E103_zpse747c301.jpg
AFAF-FEC87488D09E-154-000000080A002E23_zpsfefe9c75.jpg
8F37-853AF3FA6F8B-154-0000000A0D012600_zps88c9f727.jpg
9E53-7E0F6AD894B6-154-0000000C20B1164F_zps98f8c553.jpg

Thanks for looking :thumbsup:
 
Amazing job :D what products are you using and how the hell do you get under the Z ,mine is only 90 mm off the ground

sent by galaxy S4 on tapatalk
 
the cueball said:
charmlea said:
hi mitch, what a mint job, carnt wait to actually see it close up one day, give me a bell if your passing cambridge, bring your papper and polishing cloths !!!! what do you rekon to these claybars that every one goes on about? and what one would you recomend?

Mick [ cambridge]

for someone starting out, I would recommend the clay bar from Bilt Hamber. You get a lot of clay for your money, plus you can safely use it with water - no need for other costs like "special" clay lube.

What I would also say is, and this is to help with the claying, and potential damage from it, is to add in 2 chemical decontamination stages... firstly a dedicated tar remover (if needed) and secondly a dedicated fall out/iron remover.

These chemical stages are quicker, easier and safer for your paintwork.

:thumbsup:

paulgs1000 said:
Mitch,
what's all this measurement about!

The measurement is for the clearcoat of the car.

Most cars have colour paint, with a clear coat on top, and that is the bit that gets polished/wet sanded.

However, you only have a certain thickness of clear.

The clear can be hard, or soft, it can be thicker in some places than others, it can be sticky... but when it's gone, you have to repaint the car.

So excessive polishing/sanding can lead to either no clear coat (burn through) or lower it so much that it fails and starts to fall off the car.

You should measure the clear before any work to a) know the levels, and b) spot any non standard paint work.

You should also measure the clear when deciding on what polish to use - helps you know removal rates i.e is your polish too aggresive, do you have soft or hard clear coat.

and you should measure it when wet sanding after each grade/pass for the same reasons above.

:thumbsup:
Hi,
great job, thinking of doing mine, it's the same colour, can you recommend a paint thickness tester ??, seen some on Ebay ranging from ~€10 up to ~€100 do I have to pay big bucks to get one that works properly ?

Thanks
 
si-forks said:
Amazing job :D what products are you using and how the hell do you get under the Z ,mine is only 90 mm off the ground

sent by galaxy S4 on tapatalk


Thanks, im using megs apc and autofinesse citrus power to degrease, with various brushes, and hi temp paint, to finish it off, lol the car was on a jack and axle stands but was removed when i was taking the pics.
 
fixit man said:
the cueball said:
charmlea said:
hi mitch, what a mint job, carnt wait to actually see it close up one day, give me a bell if your passing cambridge, bring your papper and polishing cloths !!!! what do you rekon to these claybars that every one goes on about? and what one would you recomend?

Mick [ cambridge]

for someone starting out, I would recommend the clay bar from Bilt Hamber. You get a lot of clay for your money, plus you can safely use it with water - no need for other costs like "special" clay lube.

What I would also say is, and this is to help with the claying, and potential damage from it, is to add in 2 chemical decontamination stages... firstly a dedicated tar remover (if needed) and secondly a dedicated fall out/iron remover.

These chemical stages are quicker, easier and safer for your paintwork.

:thumbsup:

paulgs1000 said:
Mitch,
what's all this measurement about!

The measurement is for the clearcoat of the car.

Most cars have colour paint, with a clear coat on top, and that is the bit that gets polished/wet sanded.

However, you only have a certain thickness of clear.

The clear can be hard, or soft, it can be thicker in some places than others, it can be sticky... but when it's gone, you have to repaint the car.

So excessive polishing/sanding can lead to either no clear coat (burn through) or lower it so much that it fails and starts to fall off the car.

You should measure the clear before any work to a) know the levels, and b) spot any non standard paint work.

You should also measure the clear when deciding on what polish to use - helps you know removal rates i.e is your polish too aggresive, do you have soft or hard clear coat.

and you should measure it when wet sanding after each grade/pass for the same reasons above.

:thumbsup:
Hi,
great job, thinking of doing mine, it's the same colour, can you recommend a paint thickness tester ??, seen some on Ebay ranging from ~€10 up to ~€100 do I have to pay big bucks to get one that works properly ?

Thanks

Thanks for the comment, defo wouldnt go for a cheap one, i would look at the £150-£200 mark for a good one what you can get good measurements from :thumbsup:
 
No, the egr valve does not accelerate the heat up of the cats, but it is a measure to reduce emissions, just as the air pump is (especially reduce emissions when the engine is cold).
But afaik the m54 doesn't have a EGR valve (although some extreme valve timing can provide a similar effect I think)
 
GuidoK said:
No, the egr valve does not accelerate the heat up of the cats, but it is a measure to reduce emissions, just as the air pump is (especially reduce emissions when the engine is cold).
But afaik the m54 doesn't have a EGR valve (although some extreme valve timing can provide a similar effect I think)
Ahh you live and learn :lol:
 
Got some more done on the zed today, been a good weekend on the zed, here are some more pics,

gave the power steering rack a clean today, degreased it, and then gave it a light rub down with fine wet and dry, finished it off in some hi temp black paint,
980D-7AB58BEF15EF-148-000000083CE0BEAC_zps855a0f1e.jpg
9B50-BB634B5FF751-148-0000000849B05E1A_zps4bb44154.jpg
90EB-EE8D00B3A834-148-000000086BE7D67D_zpse897ead5.jpg

i have still got to give the gear box another paint as not happy with the finish but still happy with the results that are coming out.
got the mirror out today aswell to look at what i have done so here are more pics: :D
956A-394694B43100-148-00000008C64BA2B3_zps92f4ff5f.jpg
8571-FC8B3A63F436-148-0000000876389344_zps258a5e1e.jpg
8ABC-7709791B0926-148-000000089A2C6EB5_zpsfc9f31c5.jpg
8D97-71719143364A-148-0000000885F36D79_zpsb2b98ec1.jpg
BD40-E744EEC0295A-148-00000008A3809842_zps078a3a77.jpg

Thanks for looking again :D
 
This looks amazing!. :thumbsup:

So you sand down with the highest wet and dry grade, then clay bar, then polish?

Would you be able to clarify the steps involved (sorry if I have missed those) I would love to give this a go.


AZ4MW - Where in Suffolk are you from?
 
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