Automotive Cylinder Leak Down Test

Automotive Cylinder Leak Down Test

Category:

Autos & Vehicles

Tags:

• Automotive
• engine
• Cylinder
• Leak
• Down
• Test
• richpin

[hondaslave]

does it have to be on tdc of the compression stroke

[richpin06a]

@hondaslave Yes it does

[Vintageguy73]

Very good video!

I've used masking tape on the balancer to determine TDC for different cylinders. Cut a piece of masking tape the same length as the circumference of the balancer. Make three equally spaced marks on the tape, put the tape on the balancer starting at #1 TDC. Now when the marks line up with the timing pointer each piston will be at TDC compression following the firing order.

[richpin06a]

@Vintageguy73 I have done the same think to adjust the valves put four marks on the pulley for each cylinder top dead centers.

[liOVERLOADil]

How can you get a proper test if the engine has been sitting for so long and the piston isn't lubricated? Won't air just come out of everything if not properly lubricated?

[richpin06a]

@liOVERLOADil I do not think letting the engine cool down to take out the spark plugs will effect the test.

[Robonza]

@hondaslave Sometimes you can have a damaged bore say an inch below TDC causing your leakage. This can only be tested when you are off TDC. Its a tricky one to do but you can rotate the engine while the test is being done. Obviously you do TDC compression stroke first.

[68ray]

What's a Ka-Burator?



[serchmarc]

iv just subbed!!!

[marek0086]

@richpin06a~ it will affect the test because the ring end gaps get bigger the colder the engine is.

[zambam3]

great video brother! thanks, rob

[ybafool2]

Very cool. I did not know you could do this lol Man I love YouTube :)

[TheBaja274]

Make sure you check your valve clearances before this test.

[kirbstone111]

Nice vid :) Thanks for sharing.