Engine Compression Check

[zero]

paano ito ginagawa? mahal ba ito? any recommended shop near greenhills or pasig?

kasi napapansin ko these past few days na medyo hirap na sa mga paahon o akyatan itong 12 year old lancer EL ko lalu na kung naka-aircon. dati naman hindi siya kinakapos sa mga akyatan kasi. may nakapagsabi sa akin kasi na ipa-compression test ko ang engine ko. tama ba yung advice na ito sa akin? thanks and more power!

[mazdamazda]

we had this done to our mazda323 before we entered it into a car-loan program. this was done since the car was already a few years old.

we had it done at ziebart's

[vinj]

I had our compression test done in Kartek Santolan-Ortigas before (mga P300+ ata yung charge nila).

Try going to Speedyfix along Santolan in San Juan (across Kartek).

[niwde11]

mga sir, gano sya katagal?

[mazdamazda]

Originally posted by niwde11
mga sir, gano sya katagal?

30 minutes lang yata

[niwde11]

Originally posted by mazdamazda
30 minutes lang yata

m2; including ba preparation dito or actual testing lang to? same lang ba sa diesel or gas? TIA

[CLAVEL3699]

Ano po ba gain nito?

Please explain lang po further sa mga wlang alam na tulad ko. hehehehe

Interesado po ako... kung maganda po sa car ko.

[niky]

Compression testing is for when you think you're losing power due to a blown gasket or oil seals...

It's also a good idea to do this for old engines after a certain period of time... It will tell you if you need an overhaul.

[vinj]

In gas engines, they just insert the testing probe thingee into one cylinder at a time via the spark plug holes then you crank the engine several times to get the compression readings. They do both a wet and dry test... if your car fails at the wet test, i think its a busted piston ring.

It also helps when you're buying a second hand car so you'll see if the engine is a-ok.

[ian_rex]

ok. let me have my say about compression. if you can't go to a shop then, try this one. when going into downhill, (assuming that you have a M/T), shift in to first gear and let go of clutch, brakes and accelerator pedals respectively. if the car maintains its speed without giving in to the pull of gravity(downhill right?) then compression is still good because of the piston rings were tight enough. on the other hand if the opposite occurs (you picked up speed), then chances are piston rings are loose enough and will have to replace it soon.

[ram]

at what speed do you recommend going into first gear? kasi pa-downhill assumed na medyo mabilis ka na. kapag ganon parang hindi papasok sa 1st gear. please correct me if my assumption is incorrect

[tarugs24]

Pre baka clutch disk lang yan... Kailan ka huling nagpalit?

[ebbfolls]

Getting a compression test is perhaps the most definitive way to find out if your engine is still in good shape. This is how it's done...

The technician will remove the plugs and insert a pressure gauge (built for this purpose) into the plug hole. He will then let an assistant crank the engine with the pedal mashed to the floor (WOT). A reading of 200 psi or more should be indicative of a good seal. The readings taken from rest of the cylinders should also be within 15% of each other. If any or all of the cylinders give a low reading, the technician will then add about a teaspoon of motor oil into the spark plug hole and repeat the test. If the reading improves, this means that the piston rings are no longer sealing the gases properly, necessitating a complete overhaul. But if the reading does not improve, this would then mean that the valves are not sealing the chamber sufficiently, thus requiring a top overhaul. However, since worn piston rings cannot rule out the possibility of bad valve sealing, it is always a good idea to have the valves checked and ground whenever a complete overhaul is performed.

If the compression test returns normal results, the engine's low power should then be attributed to the likelihood of wrong spark timing. If spark timing is found to be normal, suspect the possibility of a blocked exhaust, probably resulting from catalytic converter failure.

[boydapa]

do all cars have 200psi compression test ratings? or itss dependss...de pendot?

observation ko lng pag pababa ako di ko ginagamit yun first gear ko---as wat ian rex suggested for the test--ksi in my case ang bagal nga talaga parang usad pagong ako(so i guess that is a sign of a good compression tama ba?). usually nasa 3rd gear ako para medyo mabilis

[boydapa]

doble

[estong_bulutong]

Originally posted by ian_rex
ok. let me have my say about compression. if you can't go to a shop then, try this one. when going into downhill, (assuming that you have a M/T), shift in to first gear and let go of clutch, brakes and accelerator pedals respectively. if the car maintains its speed without giving in to the pull of gravity(downhill right?) then compression is still good because of the piston rings were tight enough. on the other hand if the opposite occurs (you picked up speed), then chances are piston rings are loose enough and will have to replace it soon.

aba ok pa pala makina ko.... pero bakit mausok na? help please

[boydapa]

oo nga bkit ganun daw---kng mausok edi ibig sabihin lumalabas yun langis dat is kng blue yun smoke

[estong_bulutong]

wala nang sumagot... hehehe

[zero]

salamat sa vinj sa reply mo. alam ko na yung mga shops na binanggit mo.

ian_rex, sinubukan ko yung sinabi mo kanina sa canley road sa pasig. so far, mahigpit pa rin ang feeling ng engine nuong bumababa ito at 1st gear.

binuksan ko nga pala yung distributor cap ng car ko, nakita kong may crack na yung umiikot sa gitna ng distributor (di ko alam tawag dun??) ito kaya ang culprit kaya medyo hirap humatak ang makina ko?? mag-try pa ako humanap ng surplus nito this weekend. suspect ko tuloy ngayon baka mahina ang electric supply sa engine. i'll have my high tension wires checked na rin nga. tuwing kailan ba ang palit ng high tension wires. stock pa rin kasi yung sa car ko, 12 yrs. old na.

thank you ulet, merry christmas to all.

[SunTzu]

Originally posted by zero
salamat sa vinj sa reply mo. alam ko na yung mga shops na binanggit mo.

ian_rex, sinubukan ko yung sinabi mo kanina sa canley road sa pasig. so far, mahigpit pa rin ang feeling ng engine nuong bumababa ito at 1st gear.

binuksan ko nga pala yung distributor cap ng car ko, nakita kong may crack na yung umiikot sa gitna ng distributor (di ko alam tawag dun??) ito kaya ang culprit kaya medyo hirap humatak ang makina ko?? mag-try pa ako humanap ng surplus nito this weekend. suspect ko tuloy ngayon baka mahina ang electric supply sa engine. i'll have my high tension wires checked na rin nga. tuwing kailan ba ang palit ng high tension wires. stock pa rin kasi yung sa car ko, 12 yrs. old na.

thank you ulet, merry christmas to all.

you mean the rotor? yes, dapat palitan mo na yan. ung dati sa akin nadurog ang ganyan ko buti na lang malapit sa house namin. tinirik ako. and ung high tension hindi naman consumable na may periodic maintenance. check mo nal ang kung may tumatalong kuryente.