I sold an engine to a friend for his caddy and gave him help setting it up.It knocks quite heavily I changed the pump timing and still the knock remained, I even swung the pump across it's timing limits while the engine was running - no real change.He swapped the injectors for known good ones - still knocking.Fearing the worst I missed out on Sunday lie in and was down at his garage early, I pulled the head - very clean, slight carbon build up on number 3 but as expected.Now pulled the sump, nothing in the oil, dropped the connecting rod caps and pulled the pistons out to checkStill nothing It's not lifters as it's not 'that' type of ticky noise, it's more clack.Any ideas people? It starts and runs fine. Just noisy.It can only be pump now surely?It could be the valves kissing the pistons, or getting very close to them. Nearest point is not TDC but a little either side, as the piston chases the exhaust valve before it closes BTDC and as the inlet chases the piston ATDC. The sound echoes out the manifolds. Worsened by skimming of head, naturally...My engine has been doing it for 30,000miles
It could be the valves kissing the pistons, or getting very close to them.
I sold an engine to a friend for his caddy and gave him help setting it up.It knocks quite heavily I changed the pump timing and still the knock remained, I even swung the pump across it's timing limits while the engine was running - no real change.He swapped the injectors for known good ones - still knocking.Fearing the worst I missed out on Sunday lie in and was down at his garage early, I pulled the head - very clean, slight carbon build up on number 3 but as expected.Now pulled the sump, nothing in the oil, dropped the connecting rod caps and pulled the pistons out to checkStill nothing It's not lifters as it's not 'that' type of ticky noise, it's more clack.Any ideas people? It starts and runs fine. Just noisy.It can only be pump now surely?
Off the wall question, is this engine hydro or mech lifter???
If you crack the fuel lines one at a time, you will take the load off that cylinder( no fuel= no fire=no load) -you can see if the noise changes. To check for the flywheel bolts, put the car in gear-have someone stand hard on the brakes-and go back+ forth with the crank bolt. Look to see if the flywheel moves the same amount as the crank bolt. Also-are #1+4 piston up the same amount? (just thinking possible prior bent rod)
QuoteOff the wall question, is this engine hydro or mech lifter???hydroMark/BlackdogvanI'll try that test when it's rebuilt, the workshop is right next to the only real dual carriageway in North Devon. A well known test strip.
It's got me beat! looks like the turbo seal is giving up the game too.We're going to fit another engine and this one will get an autopsy at some point.
I do know that I drive torque, while listening to my friends prattle on about horsepower.