5 replies to this topic

[mk=john]

Hi
As many of you are aware, I have had my 850cc engine rebuilt to original spec for my 1960 mini. I previously had low cylinder compression results, and the cylinder head has been rebuilt again because of this.The new results are using the Gunson compression tester:

Cylinder#1: 100 PSI
Cylinder#2: 118 PSI
Cylinder#3: 100 PSI
Cylinder#4: 100 PSI

The engine has not yet been started since rebuild, so i guess these values will improve as the rings bed in?
But are the values shown, high enough for the engine to start in the first place?

Thanks
John

[mk=john]

Anyone...please?!!

[yellowmonster]

As you already mentioned yourself John; the parts need setting/ bedding in.
The values are good enough to get the engine started, and will probably rise as the miles pile up.
Take care

[midridge2]

yes the engine should start with those readings if all other things are ok, eg timing/fuel etc.
those are very low readings for a rebuilt engine. was it rebored or just new rings fitted?

[mk=john]

Fully rebuilt

[liirge]

put a little oil in each cylinder if the values increase a lot then you know that its a ring issue, that may just require simply bedding in. If the figures do not increase you know the valves or head gasket are not right!