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I believe i put the second ring wrong does the beveled go up or down on my piston.350

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BEVELED END DOWN ON THE SECOND COMPRESSION RING.

Posted on Jul 15, 2010

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Why is my newly rebuilt 5.7 350 chev. Engine burning so much oil. It's not leaking, and not smokeing out tail pipe?


what was entailed in the rebuild?
cylinders bored and hone , new pistons , rings
crank grind and new bearings
or was it just a ring refresh and sand paper on the cylinders
I'm thinking the latter ( cheap and nasty)
The oil will be coming past the rings and being burnt in the exhaust ( cat converter if you still have one )
That oil passing the rings comes from , glazed bores , rings being installed upside down, ring gaps not being set 120 degrees apart but almost lining up
worn ring lands in the pistons
Sump oil either leaks out -- Gaskets , seals filters or is passed by the rings and burnt in the combustion process

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What is wrong with my 1985 xf falcon if there is no compression in the second cylinder ?


Could be a burnt valve , broke piston rings . blown head gasket ! You need to do a cylinder leak down test to see where it's leaking ! You take air pressure from an air compressor an put it into the hole the spark plug goes into , an listen where the air is escaping from , exhaust tail pipe - burnt exhaust valve . Air bubbles in radiator - head gasket . How To Perform Leak Down Test EricTheCarGuy

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Just put new piston and rings in my 82 it200. Starts right up, problem is I'm pulling gear oil out of my exhaust. What did I do wrong?


probably connected the transmission vent hose to the vacuum line. Are you sure that it is gear oil and not sump oil from the rings being fitted up side down

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Just re done top of motor. Everything together and I start it steam dumps out of the exhaust. I believe a water hose is wrong from the radiator somewhere. Need to know how to run the hoses. 89 iroc camaro...


Steam from the exhaust means, unfortunately, that coolant is entering the cylinders, and very little running like that will destroy the rings and pistons. It could be anything from an intake or head gasket leak to a cracked cylinder.

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1 Answer

How do i chang worn rings?


im assuming you mean piston rings. to change your piston rings you need to remove spark plugs, empty your oil, remove your oil pan. unbolt your crank shaft and anything attached to it. at this point you should be able to pull your pistons down remove the rings and put new ones on as per the instructions provided with the new rings. use a hone or at least acid wash the cylinders before you reinstall your pistons. also make sure you reset your timing correctly. goodluck

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I have a 350 in my 71 camaro. when i start the engine i get apuff of smoke for about 20 seconds then no more smoke. Any ideas?


This is usually caused by worn valve guides allowing oil to drip down the valves into the combustion chamber--something that could be forgiven on such an old engine. If you want to fit it, have new guides put into the heads or have the existing guides knurled.

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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..."

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Overhauling a 2003 chevy duramax with an LB7 and need to know which side is the top side of the rings for the top two compression rings


look at the paper that came with the rings. Usualy if it has a dot or other mark on it the mark goes to the top, a bevel on the inside edge of the ring goes up, and a bevel on the outside usualy goes down.

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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

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