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Compression on engin model 251417 -0137-01 - Cars & Trucks

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Ford Fiesta Ecoboost2013 50 000km needs engine replaced due to failed compression test.common problem with this model?


Not a problem I have heard about and certainly isn't something Ford products are prone to.

I certainly wouldn't land my customer a bill for a replacement engine on the strength of a compression test. The compression test is a notoriously unreliable method of assessing engine condition and is useful only as a quick and simple check to discover whether further investigation of compression-related components are needed or whether something else is causing the trouble.

In the case of low compression a cylinder leakage test should be carried out in order to pinpoint where the compression is escaping and then armed with that information the repairer should offer the option of repair, the fitting of an exchange cylinder head, the fitting of a short engine, a conditioned or a reconditioned engine and explain the relative costs and advantages of each option.

It is worth noting a condition called tappet jacking can cause a loss of compression and several times I have encountered Ford engines that have suddenly shed carbon from the piston tops which has become trapped under the valve seats causing such a massive loss of compression the engines stopped. The first time I removed the cylinder head but subsequently I poured Red-X upper cylinder lubricant into the cylinders and eventually they restarted and after a few minutes once again ran normally.
One of those vehicles was a taxi and the carbon shedding happened every 40,000 miles...

Jun 20, 2018 | Ford Cars & Trucks

1 Answer

I put used engine in 08 chevy Equanox Junk yard gave me 05 it wont start help


Fuel, compression and spark.

Check the above. If you have adequate fuel pressure, reasonable compression and a good spark the engine should start. It may also be a good idea to check for compatibility with your engine control module between a 2008 model year and the 2005 model years.

Jul 23, 2017 | 2008 Chevrolet Equinox

1 Answer

Ford windstar over heated now wont start


What is model year?
Sometimes if overheated, it can cause internal engine damage. I'd check cylinder compression, first? If no or very poor compression, you engine is probably damaged. Will the starter motor crank it?

Jan 28, 2016 | Ford Cars & Trucks

1 Answer

No compression in engine


Not enough information to answer. Need manufacturer, year, model, engine size, 2WD/4WD/AWD, and Manual or Automatic transmission as applicable in order to answer the question.

Nov 22, 2015 | Cars & Trucks

1 Answer

My timing belt broke never made a sound I replaced it without a compression test. Nothing can you help


A lot of engines are no tolerance engines. Meaning when the belt breaks, the pistons will slap the valves. A compression test will find this. No compression. You'll be lucky if it only bent the valves. I have seen them break the valves off and punch holes it the tops of the pistons. Year make model and engine size would help.

Feb 13, 2015 | Cars & Trucks

1 Answer

Im looking for a spark plug wirng diagram for a 1966 corette 427


1966 - 1969 with 4 Barrel Carb (L36)
(Low Compression Model)
Max Brake Horsepower - 390 @ 5200 rpm
Max Torque - 470 @ 3600 rpm
Stroke - 3.76
Bore - 4.251
Compression - 10.25
Firing Order - 18436572

1966 with 4 Barrel Carb (L72)
(High Compression Model)
Max Brake Horsepower - 425 @ 5600 rpm
Max Torque - 460 @ 4000 rpm
Stroke - 3.76
Bore - 4.251
Compression - 11.0
Firing Order - 18436572


zjlimited_1418.jpg

283, 327, 396, 409 and 427 CID Engine 1965-1966
Firing Order 1-8-4-3-6-5-7-2


zjlimited_1417.jpg

350 CID Engine 1969-1974 Corvette, 427 CID Engine 1969 Corvette
Firing Order 1-8-4-3-6-5-7-2


Hope this helps (remember to rate this answer)

Jun 15, 2011 | Chevrolet Corvette Cars & Trucks

1 Answer

I don't have any engine compression. my toyota altis model 2006 3zz was overhauled but there was no compression when we assembled it back and tried to run the engine. was i wrong with the engine timing?


The engine timing being faulty would be a very likely reason especially if all the cylinders have no compression. Less likely reasons could be forgetting to install a cylinder head gasket, putting the wrong size valves in the cylinder head, installing new valves without lapping them into the valve seats, loose spark plugs, and piston ring gaps that are lined up instead of staggered.

Mar 05, 2011 | 2004 Toyota Corolla

3 Answers

What is the cylinder compression psi fpr the 2.0 liter engine


usual on 4 cylinder around 175psi.225psi is very high for your car,150psi seems ok,you may have two problems.A leaking head gasket and high compression due to carbon build up on the pistons.Check your Hyundai Dealer to see is this problem is covered under their 100,000 mile warranty,it should be.IF not then
the head needs to come off and had gasket replaced along with clean the top of pistons since they are right there,sounds like and easy fix.also check condition of radiator,and I would rec. replacing thermostat since some Hyundai models had problems with their thermostats

Jun 14, 2009 | 2001 Hyundai Elantra

2 Answers

Which Mazda diesel engine do I have? RF, RF-CX or RF-N


The engine is a RF- CX the CX denotes comprex pressure wave supercgarger

Jun 14, 2009 | 1988 Mazda 626 Turbo

2 Answers

Low compression in a 1999 sunfire. will not start, does fire


There can be several causes for low compression.
Chck the obvious first. the spark plugs must be checked that they are all in good condition. not burnt, the gap must be good( for your engine).Check the wires and coil so that good spark is obtained. Blue spark , not weak yellow spark. After everything is good. Check the cylinders to see if they have compression. To test the cylinders do the procedures shown below.

If the cylinder shows little leakdown or holds good compression when a little oil is squirted into the cylinder (wet compression test), it would tell you that the engine needs new valve guide seals and/or guide work. Most late model import engines have positive valve guide seals. Often, the guides are fine, but the seals are worn or cracked. The seals can be replaced on some engines without too much effort and without having to remove the head.

compression test will help you determine if the oil is getting past the valve guides or the rings. If the cylinder shows little leakdown or holds good compression when a little oil is squirted into the cylinder (wet compression test), it would tell you that the engine needs new valve guide seals and/or guide work. Most late model import engines have positive valve guide seals. Often, the guides are fine, but the seals are worn or cracked. The seals can be replaced on some engines without too much effort and without having to remove the head.

finally if the rings on one or more of the pistons can caus compression leak. It must be located and fixed.

Mar 03, 2009 | 1999 Pontiac Sunfire

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