Test And Adjustments; Compression Test - Volvo Penta D1-13 Workshop Manual

P0007969
47701798 05-2013 © AB VOLVO PENTA
20-0 Engine Information, General

Test and Adjustments

Compression Test

Tools:
885252 Adapter
885484 Adapter
9988539 Compression meter
In order to assess engine condition in a simple, reliable
manner, a compression test is carried out to show cyl-
inder and valve sealing.
• Warm the engine up, then stop it.
• Remove all the injectors and test each of the cylin-
ders in turn.
IMPORTANT!
Observe the greatest possible cleanliness, to avoid
getting dirt in the fuel system.
Plug the connections for the disassembled injectors
and fuel pipes.
The compression pressure must be read at normal
starter motor speed.
Low combustion pressure in all cylinders indicates
worn cylinder bores and piston rings. If one cylinder
has lower compression than the others, the reason can
be poor valve sealing, broken piston rings or a dam-
aged cylinder head gasket.
Place the adapters 885484 Adapter and
885252 Adapter in the injector sockets.
Place 9988539 Compression meter in the adapter and
carry out the compression test.
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