How do I know if my engine is worn and its hard to start

Posted by Ashley Wilson on

Diesel, Petrol and Gas engines can blow Blue smoke, Black smoke and White smoke you can go back to one of my earlier blogs and that will explain what causes these different colour smoking engines

What causes my engine blow smoke


Diesel engines require a high combustion pressure to cause a high temperature explosion to occur in the cylinder. Were a Petrol engine uses a spark plug to ignite the fuel. Gas engine also require a spark plug to ignite the gas.

If you find your diesel engine, petrol engine or Gas engine lacks power or is hard to start.  The best thing to do is perform a compression test. This requires you to remove the injector if diesel or spark plug if petrol or gas. A diesel compression tester will need to be screwed in or held in with clamp/plates as the compression is normally 400 PSI upwards. You will have to refer to the manual for the working compressions.  Petrol is easier as there compression is 150PSi upwards and the compression tester can normally be held in by hand. Except with the later engines of 200 psi upwards, Racing and Hi Performance engines once again totally different

If your compressions are low you can perform a wet test. Basically this is done by squirting oil into the cylinder or cylinders

  • If the compression increases by 10psi upwards it’s a simple indication of worn rings or cylinder bore.
  • If the compression stays the same it’s an indication of the cylinder valves not sealing.

If your compressions are OK. Then you will need to be checking all your fuel injection pressures, glow plugs is still hard to start

If you’re still having problems send us and email and we can see if we can assist.

hope this helps

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