Question about 1988 Mazda B2200

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Piston ring 2nd ring has no mark showing which side points to the top of piston; flat on one side, grooved on outer edge on other side . WHICH WAY IS UP????

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  • Anonymous Mar 28, 2014

    I had my car in the shop and after paying over $1000. now they say my #1 piston ring needs replacing. I am on a limited income and its my only transportation I have and now it wont pass smog. PLEASE help me.... Thank You!!!! you can reach me at 530]354-0390

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That is the oil ring and should make no difference just make sure that the open end of the rings are spaced diferent from the others do not have the open ends in line with each other...please rate this thanks

Posted on Sep 24, 2008

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Where is the piston o ring


The term "o-ring" usually is in reference to some sort of rubber or neoprene ring that serves as a gasket or seal for something. Pistons do not have o-rings, but they do have piston rings. There are usually three or more rings on each piston. They are split rings of steel that are inserted into grooves of the outer circumference of the piston. They seal the piston to the cylinder walls and prevent the air/fuel mix from getting past the piston into the crankcase and prevents the crankcase oil from being sucked into the cylinders. With the pistons rings, the cylinders would not have sufficient compression to do their job effectively. Rings can and do break from time to time. This can cause degradation of performance or in the worst-case scenarios, serious cylinder damage.



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How to make a 5 point star


Use a compass to draw a circle the size you want your star to be.
Draw a second, smaller circle inside the first, using the same center point. Make the second circle about half the size of the first.
Draw a line from the edge of the outer circle to the center point using a ruler.
Place a protractor on the line, with the center hole of the protractor over the center point of the circle.
Measure and mark every 72 degrees around the circle (72, 144, 216, 288 and 360 degrees), dividing the circle into five even sections.
Line the ruler up with the center point of the circle and one of the marks you just made.
Draw a line from the edge of the outer circle, through the center point, ending at the edge of the inner circle.
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Connect the top of one of the lines that touches the outer circle to the lines that touch the inner circle on both sides, forming a point.
Continue to connect the lines around the circle until you have made a five-point star.
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Valve hit pistons on 30 kia sedona 3.5 ltr. it left 2mm grooves in pistons. how thick are pistons and can i run the vehicle like that?


i dont think you would have a problem providing its not on the outer ring of the piston as this would cause a blow down the side of the piston.seen a lot worse in my time and never cause a problem

Nov 11, 2012 | Cars & Trucks

1 Answer

Excessive fuel consumption on vw caravelle 2.5i


Clogged PCV Valve
The main purpose of the PCV (positive crankcase ventilation) valve is to recirculate blow-by gases back from the crankcase area through the engine to consume unburned hydrocarbons. Blow by is a mixture of air, gasoline and combustion gases forced past the rings on the combustion stroke. The PCV system usually has a tube leading from the crankcase to the carburetor or intake manifold. Vacuum within the engine intake manifold pulls blow by gases out of the crankcase into the combustion chamber along with the regular intake of air and fuel.
Worn Piston Ring Grooves
For piston rings to form a good seal, the sides of the ring grooves must be true and flat - not flared or shouldered - and the rings must have the correct side clearance in the grooves. Normally, automotive ring groove side clearance should not exceed .002-.004. As the pistons move up and down, the rings must seat on the sides of the grooves in very much the same way that valves must seat to prevent leakage. New rings in tapered or irregular grooves will not seal properly and, consequently, oil will pass around behind the rings into the combustion chamber. Worn grooves are usually flared or tapered causing increased side clearances which permit more than the normal amount of oil to pass the rings into the combustion chamber. Excessive side clearances also create a pounding effect by the rings on the sides of the piston grooves. This promotes piston groove wear and, if the condition is not corrected, breakage of rings lands may occur.
Cracked or Broken Ring Lands
Cracked or broken ring lands prevent the rings from seating completely on their sides and cause oil pumping by a process similar to that described in #7. In addition to this, they also lead to serious damage to the cylinders as well as complete destruction of the pistons and rings. Cracked or broken ring lands cannot be corrected by any means other than piston replacement and this should be done as soon as there is the slightest indication of a crack.
Worn Valve Stems and Guides
When wear has taken place on valve stems and valve guides, the vacuum in the intake manifold will draw oil and oil vapor between the intake valve stems and guides, into the intake manifold and then into the cylinder where it will be burned. If this condition is not corrected when new piston rings are installed, an engine is likely to use more oil than it did before because the new piston rings will increase the vacuum in the intake manifold. When gum or deposits on the valve stems are removed - a procedure recommended when overhauling an engine - the seal previously formed will be removed and leakage will be more pronounced. This is particularly true on overhead valve engines where loss of oil may occur on the exhaust valves as well as on the intake valves. High oil consumption caused by too much valve guide clearance can frequently be cured by reaming or nerraling the valve stem. In some cases new valves may also be required. Use of a permanently bonded valve stem seal will give added insurance against oil leakage on complete engine overhauls or on valve jobs. Large Oil Leaks Leaking valve cover gaskets, leaking crankshaft front and rear seals.

Apr 24, 2011 | Volkswagen Microbus Cars & Trucks

1 Answer

Tools required to change brake pads on 2003 impala


Removal & Installation
  1. Siphon 2 / 3 of the brake fluid out of the master cylinder.
  2. Mark the relationship of the wheel to the wheel stud for re-installation purposes. Remove the tire and wheel assembly.
  3. Install 2 lug nuts to secure the rotor in place when the caliper is removed.
  4. Install a large C-clamp over the top of the caliper housing and against the back of the outboard shoe. Slowly tighten the C-clamp until the caliper pistons are pushed into the caliper bore enough to slide the caliper assembly off the rotor. Use care not to tighten the C-clamp too far or the outboard shoe retaining spring will be deformed and require replacement.
  5. Remove the caliper mounting bolts and remove the brake caliper from the mounting bracket.
  6. DO NOT disconnect the brake hose from the caliper or allow the brake hose to support the weight of the caliper. Support the caliper on a piece of wire out of the way.
  7. Remove the outer brake pad from the caliper using a suitable prying tool to lift the outboard shoe retaining spring so that it will clear the caliper center lug and pull the brake pad out of the caliper.
  8. Remove the inner brake pad by unsnapping the shoe springs from the piston.

To install:


  1. Clean all parts well. If the brake pads were worn so badly that the brake rotor is damaged, it must be replaced. Light scoring of the rotor surfaces not exceeding 0.060 inch (1.5mm) in depth is not harmful to brake operation and may result from normal use. Brake rotors may be refinished. Do not use a rotor that, after refinishing, will not meet the thickness specification cast in the rotor. Always replace with a new rotor.
  2. If not done at removal, now use a C-clamp and clamp both pistons at the same time with a metal plate or wooden block across the face of both pistons. Take care not to damage the pistons or caliper boots.
    NOTE After bottoming the pistons into the caliper bore, lift the inner edge of each caliper boot next to the piston and press out any trapped air. Make sure each boot convolution is tucked back into place. Boots must lay flat.
  3. Inspect the caliper bushings for wear. Replace as necessary. Carefully inspect the slide bolts for corrosion. If corrosion if found, use new parts including the bushing assemblies when installing the caliper. Do not attempt to polish away corrosion. Lubricate caliper slide bolts with silicone grease.
  4. Install the new inner disc brake pad in the caliper by snapping the shoe retainer springs into the piston making sure both sets of locking tabs are seated in the caliper pistons. The pad must seat flat against the pistons.
  5. Install the outer pad into the caliper by snapping the outboard shoe retaining spring over the caliper center lug and into the housing slot. The pad will slide up onto the caliper and the retaining ring will lock into place on the groove in the caliper.
  6. The outer pad wear sensor should be at the trailing edge of the shoe during forward wheel rotation.
  7. Install the caliper mounting bolts and torque to 80 ft. lbs. (108 Nm).
  8. Remove the 2 nuts temporarily securing the rotor.
  9. Install the tire and wheel assembly and tighten to specification.
  10. Pump the brake pedal several times to seat the pads against the rotor.
  11. Check the brake fluid level and top off as necessary.
  12. Road test the vehicle to ensure the proper brake performance.

Good job (remember rated and comment this).

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1 Answer

What is the piston ring gap clearance for the ford laser


Which Piston Ring Gap? First of all you need to purchase a Hayne's Manual for your car. It will give you the specifications under the Engine section of the book. The piston has three rings on it. From the top you have your first compression ring, then your second compression ring (these "clearance" specifications or "gap"), should be the same as measured on the piston insofar as the clearance between the "lands and grooves" or between the ring and the piston groove. The third ring is your oil control ring which will have a different clearance between (for example), the top of the ring installed and the piston's groove. Then lastly, you need to place the compression rings and place them in the bore of the cylinder WITHOUT being installed on the piston. A measurement is then taken between the opening gap of the ring while in the block. To make sure it's lined up properly, invert a non-ringed piston down into the bore from the top to make sure the ring is installed at the same depth all the way around.

If you don't want to buy the Hayne's Manual, just stop by your local Dealership and get the Specifications for the two compression rings, the oil ring and the "installed" clearance or gap on the rings.

Hope this Helps,

~00 Buck~

"Still living on the Right Side of Dirt..."

May 18, 2010 | Ford Laser Cars & Trucks

4 Answers

How do I set the distributor on a 2000 gmc jimmy? Just changed the intake gaskets, but forgot to mark the position of the rotor.


Get the number one piston up, Take the spark plug out the first one on the drivers side.Rotate the engine until the piston reaches TDC before it starts to decend back. U can use a screw driver to put in the spark plug hole.The rotor must point towards the number one spark plug. your local library will have this infor or autozone

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2 Answers

Looking for 2.5 engine on 86 fiero vin r


I just checked Ebay, and there are two listed. You might try Craigs List.

(Tips from me:
Port the Vortec head. Open the Intake and Exhaust ports, by smoothing them out, and smoothing the casting sprue lines out.

Put the Intake gasket, and the Exhaust gasket on the head, (After marking the area with Prussian Blue)
Scribe the opening of the gasket, onto the head, then match the ports to the scribed lines.

You also should round the valve guides top surface. (Where the valve stem meets the guide) There is a square edge that needs to be rounded. This square edge interferes with the fuel/air mixture, as the sharp edge breaks the fuel/air mixture down into droplets.
You want to keep the fuel/air mixture atomized, Not droplets.

Also narrow the casting that comes up the side of the valve guide. (Squared off shape that follows up the guide, and makes the Vortec shape swirl shape in the Intake port) Narrow it to more of a small rounded edge.

Do not polish the Bottom of the intake ports. Leave them as a rough casting. Smooth, and polish the Sides, and Top of the Intake port. (Do not get Extreme! You'll go into the water jacket with your die grinder! Factory may have had a casting shift that day. Just smooth things up)

Makes a nice swirl pattern for the fuel/air mixture.
If you polish the floor, (Bottom), of the Intake port, you will create Two swirl patterns, and they will collide with each other, making droplets again. (They cancel each other out. You want one nice swirl pattern flowing through the Intake port)

I can bring my 1985 Fiero up to 155Mph, (On dragstrip set up for this, tires, and proper safety equipment used). I can also 'Keep my foot' out of the throttle, and get 45 miles to the gallon on the highway.

You can use flat top 350 Chevy pistons. The 2.5 Vin R Fiero engine has a 4 inch bore like a small block Chevy. The pistons can be put on the Fiero rods. Same wrist pin size. The piston drops down into the engine block, about .030 below deck height.

(Wrist pin to piston crown height, is .030 shorter with 350 Chevy piston, compared to stock Fiero piston. You can buy 4 - 350 Chevy pistons AND rings, compared to the price of just the rings, for a Fiero!)

(Thirty thousandths. Real close to 1/32nd of an inch. .03125 is 1/32nd of an inch)

Fiero's have dish head pistons, so the drop in deck height, and using a Flat Top 350 Chevy piston equals out. (Better flame travel with flat top piston. Better burn, more power. Uses more of the fuel/air mixture than a dish head design)
If you can't afford to have them balanced, use a beam scale, and balance them yourself.

I can bring my 1985 Fiero up to 155Mph, (On dragstrip set up for this, and proper safety equipment used). I can also 'Keep my foot' out of the throttle, and get => 45 miles to the gallon on the highway. (Throttle Body Fuel Injection. TBI)

Makes a V6 Fiero cringe!

Sep 14, 2009 | 1988 Pontiac Fiero

1 Answer

2002 acura rsx


There are two ways to get the cylinder back into a caliper,but I'm not sure what procedure is specific to your vehicle, but-
If the outer face of the caliper piston is smooth, then it's pushed in with a large C clamp. Take a small piece of wood and place over piston. Put C clamp on wood and on back side of caliper and screw in.
If the outer edge of piston has grooves in it or if it looks kinda like a big screw, then it screws in. Hope this helps...

Jun 28, 2009 | 2003 Acura RSX

1 Answer

Piston Rings got mixed up


Put the ring backward into the grooves and you wil be able to tell which fits.

Jan 12, 2009 | 1983 Chevrolet K1500

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