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Author Topic: Compression results 3.0 mv6  (Read 3574 times)

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Nick W

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Re: Compression results 3.0 mv6
« Reply #15 on: 10 December 2015, 11:36:07 »

I checked the compression on mine when I was doing the head gaskets, got 16bar on all 6 cylinders when cold.  Guessing the heads have been skimmed twice now  :D


Were you cranking it with the throttle shut, as that tends to raise the numbers?
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sjc

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Re: Compression results 3.0 mv6
« Reply #16 on: 10 December 2015, 11:50:15 »

I checked the compression on mine when I was doing the head gaskets, got 16bar on all 6 cylinders when cold.  Guessing the heads have been skimmed twice now  :D


Were you cranking it with the throttle shut, as that tends to raise the numbers?

I was still rebuilding it so the plenum wasn't even on  ;)   Battery was fully charged right enough.

I had the heads skimmed - one was corroded where it was leaking between the cylinder and the water jacket, and also, the exhaust valves & seats were re-cut (inlets were immaculate).  The heads have been off before when they went away to Mr Blydenstein and I suspect they were skimmed then too.  The coolant bridge was a little reluctant to go back on, seemed like the heads were a little closer together than they ought to be  :)
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calibrated

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Re: Compression results 3.0 mv6
« Reply #17 on: 03 February 2016, 23:24:13 »

Done a hot engine compression test as following
1. 203 psi
2. 203 psi
3. 206 psi
4. 206 psi
5. 200 psi
6. 200 psi
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sjc

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Re: Compression results 3.0 mv6
« Reply #18 on: 04 February 2016, 06:45:07 »

Good consistent results there mate
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