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Have a 350 mag mercruiser I did a compression test 7 cylinders were 190 psi and one was 60 psi what could cause low reading?
Wiki User
∙ 9y ago
With luck, poor valve(s). Can also be poor piston rings, a busted head gasket or a cracked head.
Wiki User
∙ 9y ago
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What would cause too much pressure building up in the cooling system?
The usual cause of cooling system pressure surges is a bad head gasket. The compression from the cylinders gets into the cooling system and raises the pressure. Have a mechanic run a compression test to see if there are any big pressure changes between the cylinders.
What do wheel cylinders transform hydraulic energy into?
Force - they cause the break pads to grip the break disks.
Can you give sentences with the word compression?
If your car seems to be losing power, you should check the compression of the engine.A patient who has received severe burns may require a compression bandage while he heals.Osteoporosis may cause compression fractures as the bones weaken and become more fragile.The forces of tension and compression work together to make bridges strong enough to hold considerable weight.
Why COP is used for evaluation of compression refrigeration system but not absorption refrigeration system?
cause its a gas
What is the difference between compression and contraction?
Don't know if you are talking medical, mechanical or data compression. Contraction is when pressure is applied from outside, around an object. Muscles can contract to force a baby to be born or can cause a spasm. A strap can be tightened around something. Compression is pressure applied usually DICK in one direction, can be from all around like deep water compression. A vice can apply compression by tightening the jaws. A hydraulic press compresses items. Your spine can be damaged by compression, by too much pressure on your back which causes a compression fracture of the vertabra.
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
What will cause 4 cylinders in the same row of a v8 engine to lose compression?
Blown head gasket is one cause.
Why 1996 Chevy 4.3 V6 Pu has no compression?
No compression on all cylinders, assuming pistons are moving and valves are intact - would imply bad valve timing, most likely timing chain... Several other issues can cause low compression in misc cylinders but no compression across the board without a catastrophic event such as major overheat or fuel washing cylinders, blown crank, etc - but "no compression" again, first check would be timing chain.
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.
What would cause too much pressure building up in the cooling system?
The usual cause of cooling system pressure surges is a bad head gasket. The compression from the cylinders gets into the cooling system and raises the pressure. Have a mechanic run a compression test to see if there are any big pressure changes between the cylinders.
How do you fix compression on your Lexus?
If you have low compression on one or more cylinders then you will need to pen the engine up to find the cause. It can be either a blown head gasket, burnt valve, or worn piston rings.
Why are Cylinders 2 and 3 not working but the spark is okay on 1989 Toyota Corolla coil and distributor with carburetor?
This sounds like your head gasket has blownbetween cylinders 2 & 3.this will cause a compression loss on the affected cylinders.you need to have a compression test carried out on your engine.AnotherIf you're CERTAIN that the spark is good and it's timed properly, next I'd check the compression in those two cylinders. It's suspicious to me that the two non-functional cylinders are adjacent. If the engine has overheated any time in the last year you have probably warped the head. A simple compression test will tell the story.
What should you do when a compression test reveals that compression is below average and the reason for a motor not working?
Low compression will not cause an engine to not run. It may not run efficiently but it will run. Low compression on all cylinders is caused by wear, and can only be fixed by overhauling the engine. Low compression on just one cylinder can be a blown head gasket, burnt valve, or a broken ring on that cylinder. I also depends on what you mean by "below average". An engine with lots of miles may very well have a compression reading that is below the factory specifications and not be cause for alarm. It depends on how much below specs that compression is. In any case, the only fix is to open the engine up.
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.
What does it mean when a cars engine has no compression I was looking on craigslist for a car and I found one but the guy that is selling it said that the engine has no compression.?
do you seriously think that theres a hole in the piston in all the cylinders? or the rings are gone in all the cylinders.. highly unlikely.. the main cause of loss of compression is the rings are burnt gone. the rings are stuck, the valves are stuck, hole in the piston and/or head, bent valves, or the timing chain/belt came off, or broke. with all the cylinders being down, i'd look into the last one. that's the only thing that would be logical to effect all the cylinders evenly.
What can cause an Chevy colbat to lose compression?
On one or all cylinders? a single cylinder compression loss may be a stuck or bent valve, or even bad piston rings. Engine wide would have to be some kind of massive valve train failure.
Why do diesel engine has a greater noise than gasoline engine?
The fuel is ignited by compression and not by a spark plug. The compression of the cylinders is much higher than in a gas engine. The fuel must be compressed to the point at which it will ignite. This cause the noise you hear from a diesel engine.
