93 Metro Low Compression doesn't raise when oil put in cylinders

[JShawnA]

I have a 93 Metro 1.0 3cyl, it is hard to start, and doesn't idle well. Once it gets running it drives great when the RPMs are up. Today I got it warmed up and checked the compression.

#1 - 45
#2 - 110
#3 - 40

I then put about a teaspoon of oil into each cylinder and rechecked.

#1 - 50
#2 - 120
#3 - 45

Each cylinder didn't go up by much. Am I correct in thinking I may have a bad camshaft?

[Crvett69]

you have 2 burned exhaust valves. head needs to be rebuilt or replaced and should do the rings at the same time

[JShawnA]

Thanks for the reply. I'm guessing that must be a common problem on these engines? I have quite a few years of wrenching experience, but this is the 1st Metro I have owned. My 1st guess was worn camshaft lobes, but I could definitely see burned valves causing the same symptoms.

[Crvett69]

never seen a cam lobe on a metro wear this far but seen lots of them burn valves

[JShawnA]

Cool. I'll start tearing into it tomorrow. I'm debating buying a $500 JDM motor, or buying a complete rebuilt head for $200 and doing the rings/bearings myself.

[Johnny Mullet]

These engines are easy to rebuild. I been a mechanic for years, but never did any kind of rebuilds until I got my Metro. Here are some helpful topics with pictures to help on your quest...........

1.0L Head Repair Guide

Detailed 1.0L Head Rebuild

Extreme Metro Makeover

Bottom End Rebuild

The Weekend Rebuild

You can also find more info here............. Indexus Metrogloditus

Good Luck!