Track Days/Motorsport

Obfiouslee


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It's really simple Gizz, 50psi of steady air pressure input, calibrate the measuring guage to zero, then connect to the hose that's screwed into the spark plug hole.

You get an instant reading of the difference in pressure between input and the cylinder, then the needle slowly drops. As long as all cylinders have the same initial pressure and same rate of leaking, engine is OK. If any cylinder is different you either have broken or worn rings, a burnt valve or a blown head gasket. Where the air comes out indicates where the problem is. In my case, I just wanted to make sure that the head was seated properly.

 

So there's a flow restriction between the gauges? So an open line means the measuring gauge is at zero, and a perfectly sealed cylinder measures at 50 psi?

 

Thanks Ian.
I think we should do a leak down test on Wes at the GG. I hear his ring’s a bit worn.


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Don't worry, I don't blame you.

 

Ewwwwww

NTTAWWT


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OK, I asked Hoogle. There doesn't seem to be any standardisation - pressure and flow restrictor size being two variables. I guess if you keep the same gauge testing the same engine, you can make a valid comparison of wear or problems.

 

Left hand guage is the input pressure, right hand is pressure on the outlet side but the needle moves anticlockwise, so 0% is 50psi and 100% is 0psi.

Only $41 and a really easy way to monitor engine condition.

https://www.onlineautoparts.com.au/products/Leak-Down-Engine-Cylinder-Head-Leakage-Detector-Car-Truck-Automotive-Motors-Leak-Tester-Tool-G1016/ZPN-15599

 

Yes, the lower the input pressure, the less apparent leakage you'll have. I was looking for differences between cylinders, and wanted enough pressure to test the head to block seal, hence 50lb. I was using my nitrogen bottle, which has 1000psi available Plenty of youtube videos where they only use 15lb.

 

I heard that he'd blown a seal

 

I keep telling you lot.

It was an ice cream, and not even a Golden Gaytime.

 

How stupidly cheap for such an incredible tool.

 

I'd suggest the $271 version for a professional mechanic, but the cheap one works fine for amateurs

 

Yep, you can thank the Chinese.

 

Shouldn’t you be using 11 psi?


Silly signature here to annoy KIAI

 

Found a leaking water pump seal, so now I'm having to rebuild it, along with the pressure oil pump

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Wes reckons he's blown a seal.

 

I've seen the photos.

 

I have the T shirt.

 

Poor Seal....Is that why he left the voice and flew Back home...

 

No need to harp on a about it.

 

I wonder if he was humming his favourite tuna at the time...

 

I heard that he was feeling (Heidi) Klum


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Is that the engine oil filter there IanB? The only one this engine uses?

 

Yes, that's the oil filter, the housing for which is attached to the back of the pressure pump.

Scavenge pump (on other side of engine) just pumps directly from sump back to oil tank. It also has another water pump on the front of it, which supplies coolant to the right cylinder bank.