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Cat 966B misfiring

N

nevilley

Well-Known Member
Joined
Sep 13, 2015
Messages
100
Location
West Australia
Hi, my Cat 966 B has been sitting for a month, last time I used it running beautiful, today I go to start it and it is misfiring, I checked the fuel filter which is fine, no water on the dipstick, or oil in radiator, ,, water overflowed from radiator but I think I put to much in anyway,,, ( filled to top),, I loosened the fuel injectors which made the engine lose power in each one however I noticed the one closest to the radiator didn't make much difference,,, hoping not a blown head gasket or nothing to serious... There was extra smoke as well....
 
D

d9gdon

Senior Member
Joined
Feb 12, 2010
Messages
1,517
Location
central texas
Sounds like you have a pinhole in that pre-combustion chamber, pressurizing the cooling system and causing the miss by allowing coolant into the cylinder. Drain the coolant and remove the chamber and inspect it for tiny pinholes...it may just be loose, there's a sealing washer at the threads.
 
N

nevilley

Well-Known Member
Joined
Sep 13, 2015
Messages
100
Location
West Australia
d9gdon said:
Sounds like you have a pinhole in that pre-combustion chamber, pressurizing the cooling system and causing the miss by allowing coolant into the cylinder. Drain the coolant and remove the chamber and inspect it for tiny pinholes...it may just be loose, there's a sealing washer at the threads.
Click to expand...
Hi ,just letting you know you were right about pin holes in the combustion chamber causing the problem took it out and yes there were lots of pin holes.thanjs for the info.
 
J

JLarson

Senior Member
Joined
Aug 23, 2020
Messages
656
Location
AZ
Occupation
Owner- civil and heavy repair/fab company
Or the ol "ELC? We just run water in there" crowd Doh! :rolleyes:
 
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