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most likely a valve is not seated,burned or 'missing'.. i.e 'dropped valve' this swopuld have made an obvious noise when it happened! if any of these are happening, the piston chamber will not seal... hence no compression.. another possibility is a hole in the piston itself ...
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∙ 16y ago
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Do you need a new engine if there is no compression in one cylinder?
Depends on why there is no compression.
What are signs of broken ring in v8 engine?
Oil burning or loss of compression on any one cylinder. It may also be missing on one cylinder. A compression test will verify this.
Low compression in number one cylinder in a 1.8 dual overhead cam interference engine?
Low compression in one cylinder can mean several things. The valves or piston rings may need to be replaced. There may be a crack on the engine, or the head gasket may have blown. The engine should be diagnosed properly to see what exactly is the cause of the low compression.
What is the 350 Chevy number one cylinder and what is the number one on distributor cap?
Number one cylinder is located driver's side front of engine. With the # 1 piston at TDC on the compression stroke, the rotor will be pointing at #1 plug on cap.Number one cylinder is located driver's side front of engine. With the # 1 piston at TDC on the compression stroke, the rotor will be pointing at #1 plug on cap.
Compression on Chevy engine 5.7?
Depends alot on the year, and how many miles on the motor. Anywhere from 80lbs, and up. What you are really looking for, is a difference. One cylinder 25, or 30 lbs lower. This would indicate a dead cylinder.
What should the cylinder compression pressure be for 1991 Chevy s-10 2.5 liter engine?
It varies from one engine to the next but, what you want to see is that all the cylinders compression readings are within 10% of each other.
When does an engine need to be rebuilt?
The easiest answer is when it fails a compression test. Buy a compression tester (farily cheap), and test each cylinder. If one single cylinder is below 120 psi, or if one cylinder reads 15% less pressure than the cylinder with the highest pressure, your engine should be torn down and checked. The problem might only be in the heads, but it's still time for some serious work.
How many compression rings does the piston contain in a typical automotive engine?
2 compression rings and one oil control ( helps scrap excess oil off cylinder walls)
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.
What can cause low compression on one cylinder only?
Most of the times when you have low compression on one cylinder it's an indication that the head gasket is blown. If more than one cylinder has low compression and is hard to start the you most deffinatly have a blown head gasket
What cylinder should my distributor rotor be pointed at after I put new one on?
Just about to fire no 1 w/engine at TDC on compression stroke
Why would one cylinder compression be higher then the rest and foul up that plug.?
Excess oil from bad/stuck oil rings in that cylinder could do that.
