When you pulled the head what kind of damage did you see there. 1 of 2 Go to page. Apr 28, 2014 . Sure, it is somewhat noisy, but this issue does not cause much wear. 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. Step 2: Determine the Cause of Piston Slap. Feb 9, 2010 #1. Engine was a mild n/a setup, never an issue made over 260rwhp. 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. Bores may be ok now. Discussion Starter • #1 • Jan 22, 2017. When an engine failure occurs, the piston is likely to take the brunt of the damage. 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. A connecting rod is about $105. This would cause the oil to foam and be full of little air bubbles. The first thing you will need to do is to check the status of your pistons – are they in good condition? Can it be reused? Run the piston down and check fore cylinder damage. Were any of the srpings broken or stressed in anyway? Check for cylinder ridge indicating wear. Andrew Well-Known Member. Sunday 14th June . 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. There are many common reasons for this problem. 2,009 … Next Last. I used new rings and gave the cylinders a quick hone and ended up with 0.0045 piston clearance. A crankshaft is about $750. 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). Hopefully the cylinder is ok. OK so just got the head off of my girlfriend's 2000 Audi TT 1.8T. 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. You cannot afford to have one of its functions go bad, let alone all of them. 119 months. Piston damage is not the only consequence of bad filtration. xonix_digital 0 xonix_digital 0 Junior Member; Members; 0 127 posts; Location Boston, MA; Trader Feedback. As you can see, the piston rings play a vital role in the functionality of your vehicle’s engine. No idea how long it was ran like this. For this to happen would be at least one quart too much and probably much more than that. 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. One key to a successful engine build is to prevent this from happening. 137 Posts . 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. If the cylinders are damaged you will need to replace the cylinders. Find an appropriate feeler gauge to try to determine if the top of the piston has been beaten over and made to rub. How much is ok ?? Ok, I now have a pristine cylinder head ready to marry up to the block, but I'm concerned about number 4 piston. What caused this? bbaxj ArboristSite Lurker. bbaxj. 1) Too Much Exhaust Smoke. The old distributer type ignition will cause preignition on #1 & #3. Minor Piston Damage Sign in to follow this . It was surprisingly quiet, probably due to the piston pin offset and the octagonal expander rings. 2,479 posts. What's worse, in an engine this hot, the pistons might swell. Go. 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. 8,788 posts. Go Google 'detonation piston damage' and educate yourself on just how much damage can be caused. Tore down a 2002 4.0 today that had compression issues. This DOES NOT mean you need an engine. Reply to this topic; Start new topic; Prev; 1; 2; Next ; Page 1 of 2 . Posted November 7, 2010. 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. Would it be ok to clean up and reuse or bin it? The other pistons look eroded also.Do not reuse this trigger!! By xonix_digital, November 7, 2010 in Nissan L6 Forum. Cut issue and scored piston: how much is too much? Number 1 piston/bore. 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 . JACUSTOMER-5b7sskfj- : Not that I know of the car just shut off and the check engine light came on. I can only imagine how bad this thing sounded. The mechanic first said that I need to get a new engine for 5 grand. Valves and seats are fine too. 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. This smoke will look very thick and have dark gray and blue colors to it. This damages the bore, which means a very expensive engine repair -- if it is repairable at all. 2 Photos. Any one have an opinion on how bad this piston looks? 1-PERFECT BROWN CROWN The crown of this piston shows an ideal carbon pattern. It is often accompanied with a burning oil smell. 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 … 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. I usually put a belt on it and see if it is ok, but you can also do a leak down test to see. 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. Besides the damage caused by blow-by gases, improper lubrication and free hydrocarbons in the oil, there may be mechanical damage evident. The pistons use round wire lock type pin retainers. BigBob : I should have said valve to valve bending, not valve to piston. Why can’t I change the piston and fix whatever other damage it might have? Easy way to check, that are engine's pistons rings OK or not. Reply ... might be a slim chance of damage if doing flat out track days , will be ok under normal driving . please let me know if this piston damage is referred to as; melted piston IMG_1833.JPGIMG_1834.JPG The rest are not this bad, but I guess I have to act on the worst case. GTM Proven Member. Advertisements … Too Much of a Good Thing. 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. A Subaru '09 with 60.000 miles has a damaged piston. The outer edge of the piston crown is badly pitted - see photo. If the cylinder heads are damaged, they would need to be replaced. Piston pin "end play" ? 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? trickywoo. Finally, the last function of piston rings is to ensure the piston does not knock against the cylinder wall. Joined: Nov 8, 2009 Location: Smithtown Local Time: 4:02 AM. It depends on how much internal damage and how the engine is blown. 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. Minor Piston Damage. The average builder can certainly opt to use standard production-gapped rings to avoid this issue. I do not know how you can cause so much damage to the #4 piston and not hurt #1 as well. Post by BillK » Fri Nov 20, 2020 8:59 pm. This debris can also collect in the bottom end of the engine. Here are some bikes that used the same piston. … References. So, you should check and determine whether your piston is still in a good status. I know some parts are different but i think 03 and 04 cylinders should go in without any other mods. The plugs that came out were fine, I don't remember one ever breaking, never pinged. Engine, Trans & Driveline. Step 1: Check the Status of Your Piston As a matter of fact, piston slap is not truly destructive at all. The third function is to take heat away from the pistons so that it doesn’t damage the engine. Mar 30, 2006 #3. Sponsored Links Remove Advertisements. Recommended Posts. This will cause a certain amount of damage, dependent on the make and model of your gun. Too much would be when the crankshaft and piston rod ends are hitting the oil in the crankcase. This indicates that the bike's engine has been set up and jetted correctly. Below are the top 5 symptoms of bad piston rings. 0 0 0. 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. Hey guys, One of my customers has a set of brand new forged pistons that he brought by for me to look at. 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. After damage due to dirt, damage and wear caused by fuel flooding is the second most common cause of damage on piston rings. It is debated online as to how much damage dry firing can cause but the general consensus is that it shouldn’t do it. Followers 4. Thoughts? Audi TT 1.8T Broken Timing Belt Possible Piston Damage 02-18-2011 06:55 PM #1. This technical article serves as a guide for the most common mechanical problems that plague engines.

how much piston damage is ok?

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how much piston damage is ok? 2020