Tech Spam thread - because 1/4" BSP gets 5 hand spans to the jiggawatt

[Seedy Al]

I just want the metal to look like metal again.  Its not rusiy scally or anything. 

Phosphorus acid seems a bit more extreme than I need and I can't just poor it down the drain once im done lol. Will see.

 

And yes drain tray is what I was thinking. 

[Transom]

Citric acid from the supermarket 2$ gets ya enough powder to make a few litres

[RUNAMUCK]

Wire brush cup wheel in the grinder mate. When I took in @datto_610 L24 flywheel for a skim the shop told me to gtfo since that level of rust would foul up the stones on his grinder/facer. 

I gave it a once over with the cup wheel, and the pitting was gone with a quick skim on the stones.

Those cup wheels aren't super cheap to buy (like $40) but they're a very useful tool.

[kws]

+1 on wire brush in grinder, or if you wanted a liquid to do it, Supercheap sells Evaporust which i have used a few times with great success.

[Mof]

Just don't get one of these types 

It will try and kill you 

[RUNAMUCK]

Cup wheel ftw!

[Seedy Al]

Im not worried about the actual flywheel face. We have shit to clean that up real good 

I just can't be fucked trying to wire wheel ring gear teeth etc haha. 

Plus its off a 1kz so it actually weighs a ton.

 

Will look into evaporust when im at super cheap buying a oil drain pan. But yeah. No doubt its some over priced something else lol.

[igor]

Any of you mechanic types familiar with the Nissan QR25DE? Known weaknesses? Redeeming features? Car I'm looking at with one has 166,000ish kms on it and has a four speed automatic.

[Yowzer]

Their timing chains fall apart and they're slow

In fact we are currently replacing one in an X-Trail at work that is burning all the world's oil reserves. I dunno if that's a common issue or not, but it's at about 160k.

[igor]

That does not instil confidence. How long / cunty a job is it to replace the timing chain?

[Yowzer]

No idea actually, although I've diagnosed many I've never had a customer actually go through with the repairs. They get rattly and then eventually the MIL comes on with a crank/cam phase fault when the timing gets too far out.

[Yowzer]

Some with VVT will try and compensate until it goes out of range, triggering some other fault code and engine light.

[igor]

Instead of just rattling on until the chain snaps and valves hit pistons?

[Seedy Al]

Usually the chain stretches till the cam and crank angle sensors no longer read close enough to start. 

About an 8 hour job. Chain prices range from like 350 to 800 depending on whether they include a new vvt gear or not.

You get new oil and filter at the same time as sump has to come off. Advantage is when they are like this they usually have new spark plugs because people are idiots. 

I have seen these fail from as low as 80000km

Seen some that have made it to 250000km.

Generally an average to poorly serviced one fail around the 120 to 150 mark.

 

I diagnosed one of these that was out side the work shop while I was inside working on another car just the other day

 

What sort of car?  Primera armadillo looking turd?

[chris r]

I've replaced quite a few cam/crank sensors on them and a few ignition coils due to people not changing spark plugs 

[M.H.]

Has any one had suspension springs made? Having some difficulties finding an off the shelf spring for my land rover

[Carsnz123]

I've had leaves made by Bellamy and East in CHCH. Good bunch of guys with oldschool kit. 

[Seedy Al]

Think 

14 minutes ago, 00quattro00 said:

Has any one had suspension springs made? Having some difficulties finding an off the shelf spring for my land rover

 

leaves or coil?

[M.H.]

Coils

[Seedy Al]

Also, A+++++ for citric acid

 

cost me a total of 2 dollars besides the 6 dollar tub I bought which i now can use for all sorts

 

Once machined this will be blinging