10-20-2016, 02:06 PM | #1 |
Drives: 2014 SS Convertible Join Date: Jun 2015
Location: Michigan
Posts: 175
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Swap Piston Rings to New Piston??
Per the pictures below my valve and piston were going at it. Thankfully the valve didn't break off.
Assuming the cylinder wall is fine how practical is dropping the pan, pull the piston and swap the rings to a new one? I'm not really "in love" with the idea, but i'd like to get some additional input.
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Engine: LSA Conversion, Ported Heads, 1 7/8 headers, VMS 2.5 Cam, Roto Fab intake, ADM Scoop. BMR engine mounts, 3.91
628/525 Suspension: Koni orange, (BMR everything) 1" drop springs, toe rods, trailer arms, non adjustable LCR, FE4 sway bars, sub frame connectors, delrin sub frame bushing and upper control arm bushings. Front bushings. |
10-20-2016, 03:44 PM | #2 |
Drives: 2011 2SS/RS M6 Join Date: Oct 2015
Location: Utah
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They are cheap enough, I'd just install new rings with the new piston.
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10-21-2016, 01:09 PM | #3 |
Drives: 73 VETTE ,, 05 2500hd diesel,14 1LE Join Date: Feb 2014
Location: The Left lane PHOENIX AZ
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As long as you got it apart already it would be a great time to hone the cylinders and install new forged pistons and rings and balance the engine . Would be nice to have the heads ported and throw a cam in as well .
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10-21-2016, 04:06 PM | #4 |
Helping Build America
Drives: 2010 2SS/RS,LS3 2013 Duramax 3500HD Join Date: Aug 2008
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Why did this happen? Valve retainer fail? I didn't see big cam on your mod list.
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10-21-2016, 07:29 PM | #5 |
old school chevy rodder
Drives: 2013 2SS/RS Manual,DM exhaust,CRT Join Date: Jul 2012
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Your assuming you need a new piston........... And you would want to drop the whole engine and cradle at once most likely.
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10-21-2016, 08:58 PM | #6 |
New rings on a that new piston. I wouldn't trust a piston that's been hit. You'll have to at least hone that cylinder. And then the question is how to rinse all of the honing oil out without dismantling the engine? I'd pull the engine. It can be removed from the top. Did it! Take the engine apart. Hone them all and re-ring the whole engine. This will also give you the opportunity the check the main and rod bearings. Obviously the heads need to be checked and repaired. What broke, a spring? How many miles do you have on this car? I ask because at a certain point it may be worth a full rebuild. Good Luck.
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10-22-2016, 07:45 PM | #7 |
Drives: 2014 SS Convertible Join Date: Jun 2015
Location: Michigan
Posts: 175
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So to give you guys some back story.
Either a valve spring or rocker arm bearing broke. Car has 6-7k miles on it. The cam i was running must be to aggressive, or that 1 valve spring was defective. I'm leaning toward pulling the block, but I can't get a straight answer from anyone on what to do. I'd like to buy some forged pistons and rods have a machine shop put them in and i'll throw it all back together. 2 local shops so far just tell me to buy a 100% new shortblock for like 5-7k. To me thats overkill as my goals are roughly 600whp. if anyone is in the area and/or has experience with this. Could you tell me what you think the cost should be just to drop my block off at a shop and have them put some forged internals in?
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Engine: LSA Conversion, Ported Heads, 1 7/8 headers, VMS 2.5 Cam, Roto Fab intake, ADM Scoop. BMR engine mounts, 3.91
628/525 Suspension: Koni orange, (BMR everything) 1" drop springs, toe rods, trailer arms, non adjustable LCR, FE4 sway bars, sub frame connectors, delrin sub frame bushing and upper control arm bushings. Front bushings. |
10-23-2016, 09:04 AM | #8 |
old school chevy rodder
Drives: 2013 2SS/RS Manual,DM exhaust,CRT Join Date: Jul 2012
Location: Oregon
Posts: 5,593
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I am serious I have ran a lot worse that the little kiss you got.... You can see its slightly kissing the piston as the trunnions bearings fell out then one small bite when it went and it perfectly bent the valve for saving the engine not trashing the piston. You need to talk more experienced people, sure you could blow a ton on it, or replace the what ever affected and check thoroughly as I would trash lifters, pushrods and springs and rockers....time to upgrade the trunnion, your not the first to kiss a piston and you should count your unlucky stars your not looking at having to replace that slug. The Trunnion problem is a known issue with us motorheads on here, spontaneous spring breakage ...not happening unless you stressed the hell out of it over revving most likely as the springs are tough.
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2021 Wild Cherry ZL1 A10, Sunroof, Data,Red Carbon Interior, Nav, RotoFab Big Gulp , Elite x2ultra, Borla ATAK, Driveshaft shop, full BMR susp, Speed eng. valve covers, intercoolers, ATI , 2650 MAG, DSX lid, 103 NW, JBA shorties, Lingenfelter check, 1le wheels, spoiler and diveplanes, PCV, Big3racing ice tank, [SIGPIC]etc....
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