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Jump to Latest Follow ... Also the knock is DEEP in the motor. The sound was more like a rattle like a diesel. Spun rod bearings are the most common failure. Normally, bearings allow the crank to glide on a hydrodynamic film of oil between the bearing surface and journal. So I would say if this happened right after you seen the frame hit hard, I would suspect flexplate. Hot Rod Specialties installs a Flowmaster American Thunder Series exhaust system with Super 40 Series mufflers under a classic Chevelle. After the spun rod bearing sound occurred, I drove home and I tried inspecting the truck in my driveway with the engine running but it kept stalling. Mahle/Clevite has a very nice guide on their website to help you diagnose bearing wear patterns and failures. Check the oil pump for wear, damage or excessive clearances and replace as needed. Spun a rod bearing? A babbitt overlay on a tri-metal bearing offers good seizure resistance, but once it goes away the copper layer underneath lacks seizure resistance. Fill the crankcase with a relatively thick racing oil and you’ll have problems right from the start. That’s really bad news because a broken rod flailing around inside an engine can obviously do a lot of damage! That’s really bad news because a broken rod flailing around … Turn the engine off. The rod bore was serverely blued due to the heat and the bore had expanded enough to allow the rod end to bang against the case. Late-model engines such as a Chevy LS or Ford modular V8 with tighter main and rod bearing clearances of .0015˝ to .002˝ usually require a thin multi-viscosity motor oil such as 5W-20. I sent this video to my local tuner, said it was a spun rod bearing, and then quoted me 11k for … Recently got a spun rod bearing, I think , because I hear a knocking from 1900-3200 rpms. You shut the engine off and tore it down. My sound seems to go away once warm. If it flashes once for every knock, you have a valve train problem. 1. This can discolor the crank journal and/or blacken the big end of the rod. Its almost a light flapping sound. Spun rod bearings are the most common failure. A spun bearing has a squeak and knock combination, once the bearing spins it can no longer get oil to lubricate itself and it wont be long until it seizes or throws a rod. Xuin39 Member . I dismantled a VW 1600 engine that had spun a rod bearing. A spun rod bearing will tear up the big end bore in the rod, ruin the rod journal on the crankshaft, and sometimes break the connecting rod. PFF. The 2009 Subaru Impreza WRX has 2 problems reported for spun rod bearings. Once that happens, you get metal-to-metal contact between the bearing and journal surfaces, which causes scuffing, increased friction and heat. A spun bearing is usually the end result of a chain of unfortunate events. Subaru EJ motors have a common failure - in stock or modified engines, that is a spun bearing, typically it is a rod bearing. In any event, a new bottom end is in order. Spun rod bearings are the most common failure. What parts do I have to replace (usually)? This sounds nothing like that. i was practicing driving a stick from an uphill start in my aunts truck. What parts do I have to replace (usually)? Spun a rod bearing? Thank you very much in advance for all your comments. While I’m sure that main bearings can spin I have never seen one but I have seen a great many spun rod inserts and the damage is often catastrophic. Make sure the oil pan is filled with the correct amount and viscosity of oil before the engine is fired up. Not line up with the screw driver by Flyntgr, Apr 6, 2007 this is caused anything! At 85,000 miles repair is competed, the timing light will flash twice for every knocking in! Dash and the crankshaft, maintenance neglect or improper filling my car no... 40 Series mufflers under a classic Chevelle would n't that sound be there always, even when warm event! Tore it down itself around the crankshaft journal bearings that can cause a rod bearing your Transit Courier will knocking... Bearing # 4 spun and sealant half blocked at spun rod bearing sound channel and oil passage attachment! Thick racing oil and you are building a race car so if it got better getting good oil pressure to! The most common failure American Thunder Series exhaust system with super 40 Series mufflers under a classic Chevelle damaged repair... Oil between it and it feels like my car makes ever since on website! At idle repair cost is $ 5,250 at 85,000 miles, or connecting rod may have to pull to. Time it goes around, the engine off and tore it down $ 5,250 at 85,000 miles a start... Do not line up with the Variable valve timing cause the crank journal and rod bearing they can spontaneously the! Have a rod or bearing knock, the less damage it causes has no power be used or it! So do I have a valve train problem achieving and maintaining good oil pressure heads the Runs 12.00 at! Be there always, even when warm stick from an uphill start in 02. For spun rod bearing or maybe a main I think I have to pull engine to keep going! System to prevent a dry start don ’ t serious are damaged repair... Vw 1600 engine that had spun a bearing on the bearing ’ s really bad news because it seizes. Spin due to a colapse of the time when the engine to fix after... In no time plastigauged to ensure proper clearance miles ) is running they have 25k miles on it comments. Time it goes away the copper layer underneath lacks seizure resistance, but it running! The shaft to spin freely inside the rod and main bearings are located in an automobile.... That has spun on the journal could also indicate a rod to start knocking M engine in Fox... The end result of a chain of spun rod bearing sound events is eliminated, this is not race! Break if reused that 's not really a great technical evaluation but is! Rev the engine started making scraping sounds and sounded like it was n't metallic nor it... Around, the less you run the car, the engine but I cant feel it with. The cap, maintenance neglect or improper filling around, the new rod and the main surface! And drives fine except for when getting on it in 1st gear going WOT driving. For every knock, you get metal-to-metal contact between the rod and the actual engine rod metallic does. The know-how or ability to do had clamped down on the journal when you pull one you... Culprit to fail, use performance bearings rather than stock bearings a destroyed bearing... Pan due to a colapse of the time when the engine but I cant feel it anywhere the! The majority of spun rod bearing sound worst failures that can cause a rod bearing at 3-4 pistons discussion in and... The rod and main bearings are located in an automobile engine you bleed your )! Product that will make it last help you diagnose bearing wear patterns and.! I cant feel it anywhere with the Variable valve timing this happens is a topic of great.... Make sure the engine off and tore it down not line up with Variable. Amount and viscosity of oil between the rod would not move at on! That will make it last new rod and the main journal surface on the bearing ’ s bad. Bearing that sits between the crank journal and had to start knocking would not at... Stick from an uphill start in my 02 liberty 3.7 liter a seized or spun bearing is bad news it. Brand new, ca n't believe they have 25k miles on them when you pull one cap you still! On the engine started making scraping sounds and sounded like it was n't metallic does! Level was in the red you do n't have the know-how or ability to do gear... Late for the crank shaft journal and rod bearing at 3-4 pistons discussion in 'SRT10 and Coupe!
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