Question about Ford Focus
Pull oil pan remove rod bolts push piston to top of engine to replace rings putting on new heads anyway so access to top of piston.just be careful not to scratch the crank journals with the studs on the piston rod.
you need someone to show you how, but if you want to try on your own, start with the oil ring. Depending on the type, it may have come in 3 pieces.
The 3 piece oil rings are a bit of a puzzle for the first timer, and you'll need to follow the guide, putting the center piece in place first then the two spring steel pieces will go to the top and bottom of the grove. Just put one end of the spring in place and feed it around the piston without kinking the spring steel. Also make sure the center ring doesn't overlap itself when you're done.
Or the oil ring may be a single piece. For installing single piece rings sometimes snap ring expander pliers can help you expand the ring while you slide it over the piston.
The rings are somewhat springy, and will tolerate expanding enough to get them over the piston, but don't try to open them up beyond that.
Look at the package and note the marking that indicates the top of the piston. The three piece oil ring won't require orientation like the single piece other rings, but look carefully and note the markings. Sometimes it's a dot on the piston, sometimes it's a dimple but the package should show what to look for.
Last, use a ring compressor over the pistons when you're putting the piston into the cylinder. Align the "front" marker on the piston to the front of the engine then press the piston into the cylinder, making sure that the rod cap bolts don't scratch the crankshaft.
---------- lternitivly remove both crank and camshaft pulleys and check
Well!! There are two ways of testing busted piston rings.
A. Easy way.
What you need: Car Keys
Start you car. Let it idle for 5 minutes or so. After that rev it hard. If you see white smoke comming out of exhaust vigorously. The rings are kaput.
B. Technical Way
What you need: Compression Guage, Engine oil in a dispensor, correct size Box Spanner for your spark plugs and ofcourse car keys.
1. Open the bonnet. remove a spark plug with a box spanner, Insert the compression guage.
2. Disconnect the High Tension cable from HT-Coil. (this is important, or engine will fire up)
3. Crank the engine. Take a note of the reading and match it with the factory reading (I guess you have the engine data manual already).
4. If the reading is below the actual pressure, remove the compression guage, Dispense 5-10 drops of oil (standard 20w40 will do), put back the guage. And Crank the engine again, If the compression improves, The rings need replacement.
5. Repeat the above procedure for all the cylinders
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Posted on May 29, 2009
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Posted on Jan 02, 2017
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