What should the compression be on a 4.7 Dodge?

Compression for a 4.7 Dodge
The ideal compression for a 4.7 Dodge engine is typically around 150 PSI or higher. However, it’s important to note that the specific compression values can vary based on the condition of the engine and other factors. Here are some relevant details from the search results:
– A Dodge technician mentioned that an engine with 118k miles should have 150+ PSI on compression when running correctly.
– Another user reported a compression test result of 70 PSI on #4 and #6 cylinders, indicating low compression.
– The symptoms of low engine compression in a 4.7L Dodge or Jeep vehicle include rough idle and decreased performance at highway speeds.
Based on these snippets, it’s clear that the compression test results for a 4.7 Dodge engine should ideally be around 150 PSI or higher. If the compression values are significantly lower, it may indicate issues with the engine’s performance.
If you have further questions or need more information, feel free to ask!

What is the minimum compression you should have?

But a good rule of thumb says that each cylinder in a mechanically sound engine should have compression of 130 psi or higher. While I’ve seen some people claim 100 psi is sufficient, the gearheads and other sources I’ve consulted consider that too low. In addition, you want consistency from one reading to the next.

Is 75 psi good compression?

Running compression at idle should be 50-75 PSI (about half cranking compression). Snap throttle compression should be about 80% of cranking compression.

Is 120 psi good compression?

In general, a compression reading of 120 PSI or above is considered to be good for most gasoline engines. However, the acceptable range of compression values may vary depending on the make and model of the engine, as well as its age and condition.

What is good compression for a V8 engine?

Generally V8 engines runing normally will be around the 150/160 psi mark. This is a very broad statement for those that are unfamiliar with compression and engines. To prevent initial confusion I’d like to say that compression test results very much depend on the compression ratio (C/R) of the engine being tested.

What are acceptable compression readings?

Most gas engine’s compression should be between 125 and 175 PSI while a diesel will generally fall between 275 and 400 PSI. Remember to write down each of your findings. If one or more cylinders looks to be way off in PSI, you can re-run the test again just to check.

Is 90 psi a good compression?

That is, if the compression test reveals less than 90psi, that particular cylinder can be declared “dead.” On the other end of the spectrum, ~200psi is about the most compression pressure you will see in a non-racing gasoline engine.

Is the Dodge 4.7 L V8 a good engine?

How durable is the 4.7 V8 engine? The Dodge 4.7L V8 is a good, but somewhat boring, choice in the world of Dodge engines. They should have no problem lasting over 150,000 miles but they can become very finicky if you do not keep up with the maintenance on them.

How much horsepower does a 4.7 Dodge Ram engine have?

235 hp
It originally produced 235 hp (175 kW) and 295 lb⋅ft (400 N⋅m) of torque. The 4.7 L V8 is available with four speed and five speed automatic transmissions and a 5 speed manual transmission.

Is 75 PSI good compression?

Running compression at idle should be 50-75 PSI (about half cranking compression). Snap throttle compression should be about 80% of cranking compression.

What is the common problems with a 4.7 Dodge engine?

Overheating and Blown Head Gaskets
In the 4.7 engine, sludge could lead to this issue. However, it could also be caused by broken radiators and leaking gaskets, all of which can be prevented with routine maintenance and regular care from you and a professional mechanic.