Found A Rb25 How To Tell If It Is Good

[yoshiii335]

Hello

I found a rb25det at a used car parts store, its been there for about 6 months or more.

The staff doesnt know if it runs or not.

They only test they did was check to see if the crank turns and take a look at the gears and things underneath the front gear cover.

Is there any way to check the engine besides taking it apart to see it maybe its working or not?

I wouldnt be able to take it apart unless I buy it

[dyl33]

Start it up

[admS15]

Talk to it and ask it if it will light your fire.

[WMDC35]

Could do a leak down, otherwise slap it in & boost it

[yoshiii335]

Could do a leak down, otherwise slap it in & boost it

leak down, how would I do that?

[GTSBoy]

Google how to do a leakdown test.

Here's one simple rule. If the seller is unsure of the running condition or cannot prove the running condition of an engine, you should only pay scrap value for it.

[WMDC35]

/\ , a used parts supplier should have some history & some sort guarantee/warranty

[KiwiRS4T]

Engines from a reputable dealer should be sold with a start-up warranty and if they have no idea if it goes it probably doesn't.

[Ben C34]

Lick it

[sneakey pete]

Starter plus flywheel plus bellhousing to do a compression test?

[r32-25t]

Have a beer with it and ask if it's ok

[yoshiii335]

Have a beer with it and ask if it's ok

The shop is a well known shop. Anytime they get something that they dont know about, they put in the junk section or reduce the price to a cheap price. If somethings in the junk section, doesnt mean doesnt work, just mean pieces missing, old, or no information on it.

They will usually put whats wrong with something or what condition it is in on the label. Dont think its in the junk section.

This engine they dont know if anything is wrong with it. They did the checking I mentioned earlier.

Not sure if it has their normal one week garuntee on it. If it does, there is no why I can have it put in the car in a weeks time.

Its 650.00 dollars

Edited May 11, 2016 by yoshiii335

[GTSBoy]

$650 is basically scrap value for an RB25. That's what you pay for one that is or could be broken so that you can use some or all of the parts to fix another one. A good runner here is more like $1500. So it is not a bad risk for you, and you might be able to break it up and sell parts if you were forced to. But you'd be committing to trying to use it unless you do the minimum testing, like a leakdown and see if it will crank and so on.

[yoshiii335]

$650 is basically scrap value for an RB25. That's what you pay for one that is or could be broken so that you can use some or all of the parts to fix another one. A good runner here is more like $1500. So it is not a bad risk for you, and you might be able to break it up and sell parts if you were forced to. But you'd be committing to trying to use it unless you do the minimum testing, like a leakdown and see if it will crank and so on.

Ok

So that means pistons, chambers, valves etc could be messed up or they may not be. Hmm I have to decide if I am going to take that chance. Would buying a working rb25 and building it up be better than buying one that may have to have more parts replaced? Or will it be about the same if I am going to build up the engine?

[Dose Pipe Sutututu]

Car battery, jumper leads to the starter motor and compression test it.

Then compression test again with 5ml of oil in each cylinder and record results

If they're all equal with a delta of 10psi between each cylinder then it will be fine.

[Ben C34]

Delta

[sneakey pete]

Site note, i hate it when people use fancy pants... catchy? words like delta, dashboard (for a report) etc in normal speak. seems so wanky.

[Dose Pipe Sutututu]

Eh?

Anyhow see if the motor can dose mad, if so worth buying to replace the RB20DET

[Trex]

The engine should still come with around 3 months exchange warranty, regardless of whether they have seen it running or not. Unless things have changed.

[Ben C34]

The engine should still come with around 3 months exchange warranty, regardless of whether they have seen it running or not. Unless things have changed.

He is in Japan.

Crazy shit applies there.