Engine compression

[Roger Stokes]

And I want to check the compresion does it matter which way I turn the motor? I have it out on a stand.

[Mike104]

Are you using a leak down tester or pressure guage?

 

I would normally recommend turning the engine in the direction of normal rotation.

[johnceggleston]

i don't think you are going to get an accurate compression test with the engine out of the car. it needs to turn over at "starter" speed with wide throttle. that is going be hard to do without the starter.

[nipper]

Engine out of car you need to do a leak down test.

 

 

nipper

[Roger Stokes]

ok what does the leak down test tell me? and can I rent a leak down tester from a parts place?

Thanks,

Roger

[nipper]

ok what does the leak down test tell me? and can I rent a leak down tester from a parts place?

Thanks,

Roger

 

 

You need a air compressor. I have seen people use a portable air tank with mixed results.

 

nipper

[johnceggleston]

You need a air compressor. I have seen people use a portable air tank with mixed results.

 

nipper

 

i'm pretty sure this is a NO, but could you use one of those small air compressors that come in a road ememgency kit. you know, given enough time it will inflate a tire, but not if it has a good size hole in it. only if it is a slow leak.

 

would that work for a leak down test? we are only talking about ~0.6 of a liter, way less than a tire.