Cleaning engine case
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Passatman
- Posts: 1040
- Joined: Mon Apr 08, 2002 1:01 am
Cleaning engine case
Can oven cleaner and carb cleaner be used to clean the t4 engine case.
- Can Drive Soon
- Posts: 851
- Joined: Fri May 13, 2005 1:08 pm
- Can Drive Soon
- Posts: 851
- Joined: Fri May 13, 2005 1:08 pm
Believe it or not aluminum is a very reactive metal. If aluminum is ground fine enough and some iron oxide is added and if enough heat is added there will be an alumnothermic reaction (aka Thermite). The aluminum rips the oxygen from the iron oxide molecule and this creates a ton of heat, once the reaction is done there will be almost pure iron a the bottom.


Another reaction is with mercury. If a little bit of mercury is out on a piece of alum. the aluminm will "rust".

Another reaction is with mercury. If a little bit of mercury is out on a piece of alum. the aluminm will "rust".

- Wally
- Posts: 4575
- Joined: Mon Oct 28, 2002 12:01 am
Make sure to remove the plugs, or at least the ones behind the flywheel (3). Most 'gunk' is behind those and you will not flush it out any other way, whatever the solvent.
T4T: 2,4ltr Type 4 Turbo engine, 10.58 1/4 mi in a streetlegal 1303
"Mine isn't turbo'd to make a slow engine fast, but to make a fast engine insane" - Chip Birks
"Mine isn't turbo'd to make a slow engine fast, but to make a fast engine insane" - Chip Birks
- Can Drive Soon
- Posts: 851
- Joined: Fri May 13, 2005 1:08 pm
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LancelotIV
- Posts: 12
- Joined: Fri May 06, 2005 11:09 am
It's Jamaica maaan. . . they've got tons of real estate down there to abuseCan Drive Soon wrote:You let all that crap go into the ground when you wash your engines?
- raygreenwood
- Posts: 11914
- Joined: Wed Jan 22, 2003 12:01 am
Be very careful when you select your cleaner. Most oven cleaners have sodium hydroxide (as mentioned). It will eat aluminum. The case will generally not get too much damage. But areas like the lifter bores and bearing saddles can lose microns of metal and get a rough surface after using sodium hydroxide. That means more polishing to get proper surface and more loss of tolerance.
In my opinion heads should not be put in oven cleanr/sodium hydroxide solution. Too many areas teh soloution can get under.....like valve seats, guides and cylinder seating areas.
Also....be careful of industrial degreasers. The thing about sodium hydroxide...is that it has a PH is 11-13. Very corrosive. But its solution strength in oven c;leaners is usually no so high that organic oils cannot buffer it down and dilute it. This is improtant, because sodium hydroxide has just high enough solution strength that it takes large amounts of water to dilute it enough to sheet off....so it no longer feels "slimey"....and no longer has a high enough PH to be corrosive.
Back to the industrial degreasers though... Many floor cleaners use an ingredient called sodium metasilicate. It operates much the same as sodium hydroxide. It is a high PH oxydizer. But...its PH is above 13....and its solution strength is usually so much higher than sodium hydroxide....that it requires much more water and usually under high pressure.......AND.....it does not buffer down very well with acids oils or water. It stays live and corrosive. After drying if it is not washed properly...it stays on teh surface and is reactivated every time it gets wet...including just humid weather. It will eat your stuff. Ray
In my opinion heads should not be put in oven cleanr/sodium hydroxide solution. Too many areas teh soloution can get under.....like valve seats, guides and cylinder seating areas.
Also....be careful of industrial degreasers. The thing about sodium hydroxide...is that it has a PH is 11-13. Very corrosive. But its solution strength in oven c;leaners is usually no so high that organic oils cannot buffer it down and dilute it. This is improtant, because sodium hydroxide has just high enough solution strength that it takes large amounts of water to dilute it enough to sheet off....so it no longer feels "slimey"....and no longer has a high enough PH to be corrosive.
Back to the industrial degreasers though... Many floor cleaners use an ingredient called sodium metasilicate. It operates much the same as sodium hydroxide. It is a high PH oxydizer. But...its PH is above 13....and its solution strength is usually so much higher than sodium hydroxide....that it requires much more water and usually under high pressure.......AND.....it does not buffer down very well with acids oils or water. It stays live and corrosive. After drying if it is not washed properly...it stays on teh surface and is reactivated every time it gets wet...including just humid weather. It will eat your stuff. Ray
- plynch
- Posts: 107
- Joined: Tue Oct 04, 2005 7:41 am
alumi-brite
what do you guys think of this? i used a jug of this pink stuff called aluma-brite it is used here in the coal mines on all aluminum fuel tanks to restore the shine, it too contains sod-hyd- which is h2s right? anyway i leave it on for about 10 minutes and spray it off with a pressure washer, it will eat the aluminum and it cleans the concrete drive really well,
i cleaned the last type 1 engine in it and it was clean enough to eat off of, after i payed for the local vw shop to jetwash the case and it came back with crud on it still... i also cleaned the heads and the rocker arms with it, it did oxidize the metal a little i forgot it in for about an hr and a half. but i washed and wiped the parts off before dipping in oil and then covering in assembly lube... i used it on the aluminum t4 case, do you think this got the galleys clean? i brushed it on and then sprayed some into the galley holes and then put the pressure washer up to the holes.... then i kept rinsing.... it looks good...
