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What could cause no compression on a 87 cbr1000f in all cylinders at the same time?
Hi there,
Assuming that you have ruled out the obvious (compression tester faulty)
I would start off guessing it would be either
1) Starter Motor not turning engine (check engine turns by engging a gear and trying starter)
2) Cam chain broken (remove the rocker cover and check that cam chain is present and working - when cranking engine the ams should rotate.) The thing is, if this is the cause then it will be a complete top end strip - pricey,
HTH
Chris
What else can I help you with?
What could cause low compression in all cylinders of a 1986 Isuzu Trooper with an inline 4?
AGE ! if it is low compression and not no compression then your piston rings and valves are worn too much and the engine probably needs to be rebuilt.
Is the head bad if there is no compression or is it the oil pump that operates the lifters on a 1988 323?
No compression on all cylinders would indicate a broken cam belt. i think this motor has hydralic lifter, but for them to cause no compression it would be unlikly. when you say no do you mean none at all or low compression? a broken cam belt could be the cause if all cylinders have no compression. if the cylinders are down it could be bad valve seats (the point of contact between the valve and the head). if it is one or two cylinders it could be cracked head or cracked/broken head gasket. the only other possablilities are broken rings or broken piston. you need to know compression reading of all cylinders in a dry and wet situation. to do this 1:take the compesssion of a cylinder 2:then remove compression guage and squirt two good squirts of engine oil in the cylinder through the plug hole. 3:retake comperssion reading of cylinder. if the compression reading increases you have bad rings, if it doesnt the rings are fine. hope that helped and not confused you Geoff
Why would a 1999 Mitsubishi eclipse have a very high rev when the engine is hot and jerk when idling or at constant speeds but accelerate smoothly?
Check the compression for the cylinders on the Eclipse. If there is?æa leak in one of the cylinders then this could cause the jerking.
Does engine need to be replaced when there is no compression?
If there is NO compression on any of the cylinders, you've probably slipped the timing belt/chain. Just knowing that there is no compression is insufficient information to make a decision about replacing the engine. You COULD need to have the engine rebuilt, or it's possible that a valve "kissed" a piston and the engine is toast. Or... it could be something else. If it's just low compression in one or two cylinders, it could even be caused by burned or sticking valves.
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What else could cause this compression loss?
Thare are a number of things that could cause compression loss, Like bad valve, rings, or the head gasket.
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Not running on all cylinders: Bad spark plug? Bad spark plug wire? Bad valve? blown piston? Do a compression test
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If your Grand Vitara is running on three cylinders, it could be due to several issues, such as a faulty spark plug, a malfunctioning fuel injector, or a problem with the ignition coil. Additionally, a vacuum leak or a compression issue in one of the cylinders could also cause a misfire. It's important to diagnose the specific cause with a thorough inspection or by using an OBD-II scanner to check for error codes. Addressing the problem promptly can prevent further engine damage.
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Newer engine but low compression on two cylinders on 90 Legacy could it possibly be the Ignition coil pack?
no coil packs only control spark. more likely cause is head gasket blowed between the two cylinder. your welcome!
