I messured everything as close as i could to oem specs. im installing low comp pistons and eagle rods into my block.. it was over oem specs. but i made sure that all the gaps were the same. I noticed that with the rings completely compressed the rings have no gap.. is this normal?
2007-09-04 13:30:03 · 9 answers · asked by greeneclipsers 1 in Cars & Transportation ➔ Maintenance & Repairs
oh sorry my cyl was bored ,20 over
2007-09-04 13:30:43 · update #1
as of 10:24 i Busted a ring.. my 4th piston.. so ima take it to some one... first it was main bearings cause i had to replace the block. Junk yard gave me a 1995 block and didnt tell me.. so it has different bearings for crank, bought bearings for the 1996+ and didnt work.. well the thrust bearing.. and now this.. I give up im taking it to some one.. love the car tho
2007-09-04 16:26:32 · update #2
The proper way to measure ring gap is to insert the ring alone into the cylinder and use the piston to push it down evenly about 2". Then use a feeler gage that is the minimum thickness of the spec and if that passes through the gap is ok. Then use a feeler gage that is the max spec and if it is tight or wont pass through, all is good. If the gap is below minimum spec, the ends of the ring can be filed to enlarge the gap. If the gap is too big, there is a problem with the bore size or the size of the rings ie, wrong parts. Each ring set should be checked in the cylinder that it is going to run in>
2007-09-04 13:55:49 · answer #1 · answered by Ron B 6 · 1⤊ 0⤋
Piston ring gap should be measured with the ring in the cylinder, without the piston. Just stick the ring in the cylinder, and get it as close to level in the bore as possible, then measure the gap. If the gap is too big, you will have excessive compression leaks. If the gap is too small, the rings will break when they heat up. They expand when they heat up. If it isn't in factory specs, use a ring grinder to set the gap (this is not acceptable with some rings, check the manufacturer's instructions) or replace the rings with ones that fit. Make sure, if you had your cylinders bored out, that you have the right rings. Stock size rings (and pistons) won't fit if the cylinder has been bored out.
2007-09-04 13:46:34 · answer #2 · answered by Chris 3 · 0⤊ 0⤋
The generic spec for ring end gap is .004" per inch of cylinder diameter.So measure the diameter of bore as an example lets say that you have a 4inch piston the the ring end gap should be .016" (4x.004")=.016" if the rings that you have do not have this gap then file the ends to give you the correct gap,the ring end gap should be measured half way down the bore.Take a piston with no rings on it to push the ring into position.
2007-09-04 13:51:53 · answer #3 · answered by the bear facts 5 · 1⤊ 0⤋
no you have to have a gap in them ,other wise they will break when the engine reaches normal operating temperature,you need at least 15 thousands in most engines,check the book for this but they all have to have a gap in them,that's a good way to break one and scar a cylinder wall up,been there and done it,good luck with it.
2007-09-04 13:38:57 · answer #4 · answered by dodge man 7 · 0⤊ 0⤋
I always remember that you have to have a gap for expansion when the engine gets hot or it can freeze up.
2007-09-04 13:36:40 · answer #5 · answered by sasyone 5 · 1⤊ 0⤋
No,you need to file them to specs.
2007-09-04 13:34:52 · answer #6 · answered by gdwrnch40 6 · 1⤊ 0⤋
.030 over is standard, you may need to order special rings.
2007-09-04 14:12:57 · answer #7 · answered by Mr. KnowItAll 7 · 0⤊ 0⤋
You want ai gap. Just enough so they don't get pinched. Or they shatter!
And add SASYONE answer.
.
2007-09-04 13:34:51 · answer #8 · answered by Shade tree 3 · 0⤊ 0⤋
take it to a professional engine builder, not the neighbor, have it done right, laugh later.
2007-09-04 20:12:34 · answer #9 · answered by nwmech221 2 · 0⤊ 0⤋