Compression Test - 1.8i 135 - MG-Rover.org Forums
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post #1 of 3 (permalink) Old 16-02-2017, 15:38 Thread Starter
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Compression Test - 1.8i 135

Ok i've done a quick compression test on the engine to see if there's anything amiss.

The figures I got were as follows listed in BAR(max)

Cyl1: 13.5
Cly2: 13.5
Cyl3: 14.0
Cyl4: 12.5

The tolerance listed by Rover should be within 1.5 BAR of each other which is JUST about getting away with it.

Testing Cyl4 with a bit of 5w30 oil I got the pressure to shoot up to 17BAR so I suspect it is just general wear on the rings and liners causing blow by.

Do these figures match up with what other people have come across or does anyone WITH ACTUAL KNOWLEDGE AND EXPERIENCE have any insight to anything I should be aware of.

There hasn't been any symptoms of HGF since driving this car in the last 1000 miles besides a separate overheating issue that is now resolved.

I'm just wary of what the heat might have done to Cyl4 as it's often the weakest one on the gasket.
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post #2 of 3 (permalink) Old 16-02-2017, 21:07
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Car: Rover 620ti, 2x 1996 MGF, 4x MG TF, Mazda Bongo, 2x 1999 MGF, 1972 Ford Cortina Mk3 Citroen Picasso
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not done a compression test yet as still need to replace timing belt on my one that stripped teeth, but did come across this video
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post #3 of 3 (permalink) Old 16-02-2017, 21:47 Thread Starter
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That's the same exact compression gauge i've been using!
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