The transfer ports on the engine are flowing evenly and the carbon deposits are a dark ch ocolate brown colour. A crankshaft is about $750. Recommended Posts. How much is ok ?? Total Rating 0%. Even in a mild case where the ring ends barely touch, the result can be a heavily scored cylinder wall and serious piston-ring-land damage due to this excessive load. A lot of good suggestions, but let me give my perspective, as I've rebuilt the engines of three of the cars I drive First, just because of the blue smoke, don't throw in the towel. Hey guys, One of my customers has a set of brand new forged pistons that he brought by for me to look at. 0 0 0. The rest are not this bad, but I guess I have to act on the worst case. Minor Piston Damage Sign in to follow this . Why can’t I change the piston and fix whatever other damage it might have? Check for cylinder ridge indicating wear. Thoughts? The outer edge of the piston crown is badly pitted - see photo. Piston pin "end play" ? Step 2: Determine the Cause of Piston Slap. 119 months. Mar 30, 2006 #3. Posted November 7, 2010. please let me know if this piston damage is referred to as; melted piston IMG_1833.JPGIMG_1834.JPG GTM Proven Member. 1 of 2 Go to page. Thread starter bbaxj; Start date Apr 28, 2014; 1; 2; Next. The other pistons look eroded also.Do not reuse this trigger!! Audi TT 1.8T Broken Timing Belt Possible Piston Damage 02-18-2011 06:55 PM #1. OK so just got the head off of my girlfriend's 2000 Audi TT 1.8T. I do not know how you can cause so much damage to the #4 piston and not hurt #1 as well. While the piston slap is annoying, it does often not cause much damage to the car, and you can continue driving your car for miles if it’s not too worn or burns too much oil. Sure, it is somewhat noisy, but this issue does not cause much wear. Upon disassembly I found my #4 ACL piston beaten up, appears to be damage from maybe a spark plug ground strap or some other foreign body? If the cylinder heads are damaged, they would need to be replaced. This damages the bore, which means a very expensive engine repair -- if it is repairable at all. So, you should check and determine whether your piston is still in a good status. The mechanic first said that I need to get a new engine for 5 grand. Followers 4. The worst case is that is can cause internal damage to your air rifle, requiring new components. Can it be reused? 2 Photos. trickywoo. Hopefully the cylinder is ok. References. It is often accompanied with a burning oil smell. 1-PERFECT BROWN CROWN The crown of this piston shows an ideal carbon pattern. The old distributer type ignition will cause preignition on #1 & #3. For this to happen would be at least one quart too much and probably much more than that. bbaxj ArboristSite Lurker. Easy way to check, that are engine's pistons rings OK or not. You cannot afford to have one of its functions go bad, let alone all of them. The first thing you will need to do is to check the status of your pistons – are they in good condition? This leads to premature bearing and seal failure. Would it be ok to clean up and reuse or bin it? This debris can also collect in the bottom end of the engine. If there is a lot of exhaust smoke coming out of your vehicle, this could be an easy sign that you have bad piston rings. Valves and seats are fine too. When a faulty air filter is replaced, this puts a temporary stop to further debris damage, but it does not reverse damage once it has occurred. Andrew Well-Known Member. Share this post. xonix_digital 0 xonix_digital 0 Junior Member; Members; 0 127 posts; Location Boston, MA; Trader Feedback. BigBob : I should have said valve to valve bending, not valve to piston. Were any of the srpings broken or stressed in anyway? This smoke will look very thick and have dark gray and blue colors to it. Apr 28, 2014 . JACUSTOMER-5b7sskfj- : Not that I know of the car just shut off and the check engine light came on. Reply ... might be a slim chance of damage if doing flat out track days , will be ok under normal driving . Advertisements … Piston damage is not the only consequence of bad filtration. The only cause I can think of would be something in the valve train and the since one was not touched I would look at the springs first. Tore down a 2002 4.0 today that had compression issues. Part # = 43048-006 Part Description = CALIPER PISTON Model Count = 13 Model Name Year Size Description Type KH400-A3 76 400 KH400 STREET KH400-A4 77 400 KH400 STREET KH400-A5 78 400 KH400 STREET KH500-A8 76 500 KH500 STREET KZ750-B1 76 750 750 LTD TWIN LTD STREET KZ750-B2 77 750 750 LTD TWIN LTD … As you can see, the piston rings play a vital role in the functionality of your vehicle’s engine. There are many common reasons for this problem. Step 1: Check the Status of Your Piston As a matter of fact, piston slap is not truly destructive at all. Number 1 piston/bore. Careful e of the mechanical or tuning problem that's damaged pistons as well so The crown of the piston shows an ideal carbon deposit pattern. Below are the top 5 symptoms of bad piston rings. Apr 28, 2014 #1 Sorry for the novel, but I figure too much info is better than not enough. Too much would be when the crankshaft and piston rod ends are hitting the oil in the crankcase. Go. After damage due to dirt, damage and wear caused by fuel flooding is the second most common cause of damage on piston rings. Engine was a mild n/a setup, never an issue made over 260rwhp. No idea how long it was ran like this. bbaxj. Post by BillK » Fri Nov 20, 2020 8:59 pm. A careful examination of the piston can help a mechanic trace the source of a mechanical or tuning problem. This will require you to get a good mechanic to dismantle the engine for you. Cut issue and scored piston: how much is too much? Sponsored Links Remove Advertisements. Metal contact between the piston rings and the cylinder wall (Fig. The valves hit the pistons pretty bad and was curious if its worth just putting a new head or should i look further into the pistons, attached are picture let me know what you think . I know some parts are different but i think 03 and 04 cylinders should go in without any other mods. Find an appropriate feeler gauge to try to determine if the top of the piston has been beaten over and made to rub. Too Much of a Good Thing. Oil sample probably will not tell much either way.-Eric : 8 : Cummins:B Series: 4BT a little pop then power loss and some whitish gray smoke: Flabum : 12 : 2 : 25-Nov-16 Reply: Flabum : 14-Sep-16 : There is very little clearance between the head and piston when at TDC, hopefully the tip ended up in the piston cup. One key to a successful engine build is to prevent this from happening. When an engine failure occurs, the piston is likely to take the brunt of the damage. Ok, I now have a pristine cylinder head ready to marry up to the block, but I'm concerned about number 4 piston. Minor Piston Damage. By xonix_digital, November 7, 2010 in Nissan L6 Forum. This will cause a certain amount of damage, dependent on the make and model of your gun. It is debated online as to how much damage dry firing can cause but the general consensus is that it shouldn’t do it. Go Google 'detonation piston damage' and educate yourself on just how much damage can be caused. It was surprisingly quiet, probably due to the piston pin offset and the octagonal expander rings. This technical article serves as a guide for the most common mechanical problems that plague engines. Now he is looking for other options This car can be sold -in good condition- for about 12.000 but without the engine is worth 4-5.000 should I put a new engine to a 4 year old car? The pistons use round wire lock type pin retainers. Engine, Trans & Driveline. ston is likely to take most of the damage. Sunday 14th June . … This DOES NOT mean you need an engine. Piston Wrist Pin Damage Wrist pins can wear out prematurely if the pistons are not receiving enough splash lubrication, but they can also fail as a result of over-revving the engine or too much rod flex. If the crankshaft, crankcase, or cylinder head is damaged, you would be better off looking for another engine. All piston rings appear sound as there was good compression prior to head being removed, and oil soak test shows no oil seeping past rings. I usually put a belt on it and see if it is ok, but you can also do a leak down test to see. As other people have mentioned here, a very small amount of water is not a problem. Reply to this topic; Start new topic; Prev; 1; 2; Next ; Page 1 of 2 . The average builder can certainly opt to use standard production-gapped rings to avoid this issue. I used new rings and gave the cylinders a quick hone and ended up with 0.0045 piston clearance. I have two spare ('89)Force 85 HP motors and both have one cylinder damage/low compression (70 psi) The cylinder-wall are okay & I can Hone them. What's worse, in an engine this hot, the pistons might swell. Here are some bikes that used the same piston. How to check easily that are engine's pistons rings OK or wear out in car or truck? Joined May 1, 2012 Messages 11 Location Michigan. Next Last. Feb 9, 2010 #1. A worn crankshaft thrust bearing that allows too much back-and-forth movement of the crankshaft can flex and twist the rods as the engine runs. In June last year I put together a top end using some used (low mileage) stock pistons and some relatively high mileage ported cylinders (first over). Run the piston down and check fore cylinder damage. The plugs that came out were fine, I don't remember one ever breaking, never pinged. Slowing it down so that it hits the end of the compression chamber without causing any damage to the piston. Was there some other damage done? Piston Damage. Bores may be ok now. Messages: 206 Likes Received: 5. 1) Too Much Exhaust Smoke. In the event of fuel flooding, the oil film on the cylinder wall suffers so significantly that the piston rings rub metal on metal against the cylinder wall and quickly lose radial wall thickness. This indicates that the bike's engine has been set up and jetted correctly. It depends on how much internal damage and how the engine is blown. 8,788 posts. Joined: Nov 8, 2009 Location: Smithtown Local Time: 4:02 AM. Re: This CAN'T be good - piston damage Looking at your pictures the damage is typical trigger failure. I can only imagine how bad this thing sounded. How much damage will this have done? A thin layer of oil coating all of the internal moving parts of your motor is what allows its components to rotate at extremely high speeds for thousands of miles without worrying about any damage. The ends of the rings can gouge the cylinder wall, preventing the other rings from making good contact with the cylinder walls and exacerbating the symptoms. 2,479 posts. A Subaru '09 with 60.000 miles has a damaged piston. What caused this? Finally, the last function of piston rings is to ensure the piston does not knock against the cylinder wall. Any one have an opinion on how bad this piston looks? The third function is to take heat away from the pistons so that it doesn’t damage the engine. If the cylinders are damaged you will need to replace the cylinders. 137 Posts . This would cause the oil to foam and be full of little air bubbles. 2,009 … Besides the damage caused by blow-by gases, improper lubrication and free hydrocarbons in the oil, there may be mechanical damage evident. I dont know how much it usually costs to have one honed and replated but i dont see any aftermarket ones available for before 03 Actually i just did some searches and it looks like 94 through 04 cylinders are the same. Discussion Starter • #1 • Jan 22, 2017. Air bubbles aren’t a good lubricant. A connecting rod is about $105. When you pulled the head what kind of damage did you see there. Tony1963. When the air rifle is dry fired, there is no pellet to slow the piston due to air resistance, making the piston hit the end of the compression chamber under much greater pressure. If you have a spring-piston or gas-ram airgun then you shouldn’t dry fire it unless the manufacturer’s instructions explicitly say you can do this. Oil smell check easily that are engine 's pistons rings ok or not info better... The transfer ports on the engine tuning problem pin retainers collect in the crankcase certainly opt to use production-gapped. 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2020 how much piston damage is ok?