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What should the compression be?? - 1993 Honda Accord

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Nominal is 178psi
Minimum is 135psi
with no more than 28psi difference between all the cylinder's. Good luck!

Posted on May 14, 2009

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3.8l. How much compression should it have?


most standard engines run a compression of around 155 -165 psi with no more than 10% variation between cylinders

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2002 3.7 litre jeep. How can I ck to see if a valve is fully closing? There is no lash adj. Springs look o.K. no compression #2 cyl. All others o.K.


You put compressed air into the cylinder an listen for the air escaping , if coming out of the throttle plate ,burnt intake valve . If you hear air coming out of exhaust pipe , burnt exhaust valve . If you hear air coming out dip stick tube bad rings or piston damage. How To Perform Leak Down Test EricTheCarGuy

Mar 02, 2016 | Cars & Trucks

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98 honda accord v6 only has 90 psi compression


90 psi compression is the minumun for gas engine to ignite, you have low compression what is the compression next to it? The compression on Honda V6 is 200psi. you can have a valve problem a blown head gasket, Also make sure your compression gauge is accurate by using another compression gauge

Mar 23, 2012 | 1998 Honda Accord

1 Answer

1998 dodge 318 5.2L compression


when you do your compression test squirt some oil in the cylinder through the spark plug hole first then check compression if you have compression then its rings. If still no compress you might have worn off cam lobes.

Feb 04, 2012 | 1998 Dodge Dakota

1 Answer

My 1998 saturn has low compression in number three cylinder could it be stuck and if so what can i do to free it up


Low compression is not a "stuck" issue, usually there is a valve leak or compression ring issue. Both are fairly involved to repair. The next step is a wet compression test. If the compression goes up when wet, rings are suspect, if not valve is suspect. The next test is leak down test.... BUT compression loss is not a simple fix.

Apr 22, 2011 | 1993 Saturn SL2

1 Answer

Dead cylinder. good spark (plug&wires),compression,fuel .Has an engle 110 cam and comp elec. points.Every thing else is stock,duel carb set up 40 cadron solix.


Vacuum leak? You said compression is good. You checked crankning compression, did you check running compression. A broken valve spring would cause good cranking compression but very low running compression

Apr 24, 2010 | Volkswagen Beetle Cars & Trucks

2 Answers

How do you check compression


A compression test will tell you if your engine has good compression. An engine is essentially a self-powered air pump, so it needs good compression to run efficiently, cleanly and to start easily.

As a rule, most engines should have 140 to 160 lbs. Of cranking compression with no more than 10% difference between any of the cylinders.

Low compression in one cylinder usually indicates a bad exhaust valve. Low compression in two adjacent cylinders typically means you have a bad head gasket. Low compression in all cylinders would tell you the rings and cylinders are worn and the engine needs to be overhauled.

HOW TO CHECK COMPRESSION
Compression can be checked two ways: manually with a compression gauge, or electronically with an engine analyzer the measures cranking compression. With electronic testing, a computer analyzer estimates compression in each of the engine's cylinders by measuring slight variations in engine cranking speed.

The results correlate well with actual gauge readings, and can be completed in a matter of minutes without having to remove any spark plugs. What's more, the analyzer prints out the results of the compression test making it easy to see and compare the actual numbers.

To check compression manually with a gauge, all the spark plugs must be removed. The ignition coil must then disabled or the high tension lead grounded. If the engine has a distributorless ignition, the ignition coils must be disabled to prevent them from firing. The throttle must also be held open.

The engine is then cranked for a few seconds using a remote starter switch or a helper while a compression gauge is held in a spark plug hole.

The maximum compression reading is noted, then the process is repeated for each of the remaining cylinders.

The individual cylinder readings are then compared to see if the results are within specifications (always refer to a manual for the exact compression figures for your engine because they do vary from the ballpark figures quoted earlier).

IS IT THE RINGS OR THE VALVES?
If compression is low in one or more cylinders, you can isolate the problem to the valves or rings by squirting a little 30 weight motor oil into the cylinder through the spark plug hole and repeating the compression test. The oil temporarily seals the rings.

If the compression readings are higher the second time around, it means the rings and/or cylinder is worn. No change in the compression readings would tell you the cylinder has a bad valve.

Hope this help (remember comment and rated this).

Apr 20, 2010 | 1998 Ford Contour

1 Answer

Wut number range shood i hav for agood compression test on the cylinders of my 1999 s10 4.3 liter v6?


Normal compression will be between 185 to 205.
Minimum compression is 180
Lowest compression reading should not be less than 70 percent of your highest compression reading. None of the compression readings should be less than 100 psi.

Aug 17, 2009 | Chevrolet S 10 Cars & Trucks

1 Answer

Compression check


The compressions you mentioned...Good?
No. Not at all.
Those compression reading indicate either really bad/worn piston rings, or valves that are not sealing properly, or both.
Normal compression readings should be at or above 140 PSI, +/5 5 PSI difference, no more.Save your money, and look for another unit. This engine is going to cost you a lot of money to make it right.

Mar 17, 2009 | 1989 Toyota Pickup SR5

2 Answers

Loss compression


How to Test Engine CompressionAn engine depends on an equal compression reading in each cylinder to run smoothly. If poor compression exits in one or more cylinders it can cause a rough idle condition and low power. A compression test can be performed to check wear or internal damage. To start a engine compression test gauge is needed. There are two types of gauge styles, one threads into the spark plug hole which is more accurate. The other style of gauge is constructed with a rubber plug that is meant to be pressed against the spark plug hole, this style of gauge is difficult to use. To perform a engine cylinder compression test follow the steps below.
  • Remove ignition coil connector or ignition system fuse to disable power to the ignition system
  • Test ignition system to ensure that the power to the system has been disabled
  • Remove #1 cylinder spark plug and insert compression gauge, most gauges have a hose attachment that is installed into the spark plug hole with the gauge connecting to the gauge hose.
compression_gauge.jpg
Engine Cylinder Compression Gauge
  • After the compression gauge has been inserted, use the starter to crank the engine over for about five seconds. Use about the same five seconds to test the remaining cylinders.
  • Record the compression reading as each cylinder is tested
  • Remove the compression gauge and reinsert the spark plug
  • Follow this procedure until all cylinders have been tested
  • Compare cylinders compression reading, all readings should be within about 5% of each other
If low compression exists a cylinder malfunction exits and further inspection is required. Possible causes for a low compression condition are: burned intake or exhaust valve, broken piston or piston ring, broken valve spring or a blown head gasket.

May 31, 2008 | 2000 Hyundai Tucson

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