Adam M Posted January 2, 2015 Share Posted January 2, 2015 Hey all. Just after some opinions of anyone who has ever had a big end bearing fail before. Any input is really appreciated =] So after spinning a bearing in my first engine. I then went and bought a forged motor and the same thing has happened. However Previously the rod in the first engine had massive up and down play like half an inch and was done at about 90 mph and a crank regrind was necessary (Engineers view). This time in the forged motor It was done travelling up the road (30mph's ish) after flushing out the 2nd batch of oil that was in there trying to remove the crap that I believe caused the turbo to fail. Pickup was blocked when I took the sump off. There is 1 rod that has maybe a 10th of an inch of play side to side. the others have even less play but still have some play side to side.There is no play up and down atall in any of them. There was tons of filings in the sump which I believe came from the turbo that came off the old engine and presumed off the big ends that are in there now .A couple weeks after the turbo was fitted it started smoking and had lots of shaft play so had the turbo rebuilt.The car is home and not being run as it definitely sounded like rod knock. Would anyone think I could get away with just new bearings? What is the difference in having up and down play and side to side play? All stuff I'm really interested to find out. Have a video to show the play in the rods if anyone would want to see it. Car was ment to be mapped this sunday too , what a blow below the belt ! Anyway thanks for reading! peace! \o/ Quote Link to post Share on other sites
5e colin Posted January 2, 2015 Share Posted January 2, 2015 go on show the vid im not into inch more like mm in thousands but should be minimal for sure Quote Link to post Share on other sites
Adam M Posted January 2, 2015 Author Share Posted January 2, 2015 wow fast reply colin! Sure give me a min to find a way of putting it on here. do you have fb? Quote Link to post Share on other sites
5e colin Posted January 2, 2015 Share Posted January 2, 2015 you can link a photobucket vid if you have it ??? Quote Link to post Share on other sites
Adam M Posted January 2, 2015 Author Share Posted January 2, 2015 (edited) https://www.youtube.com/watch?v=Kc2P4zBIAcY&list=UU48C6tpcLAZIcXip5g2s3ew Here ya go colin. Just set up a channel hehe ^^ thanks dude Edited January 2, 2015 by Adam M Quote Link to post Share on other sites
5e colin Posted January 3, 2015 Share Posted January 3, 2015 just back mate it looks a bit playish indeed depends how much force you use to move them ??? get plastigauge and 1 by 1 check your clearance and state of the bearings and thicknes also check if the sids of rods are digging in the crank wal those metal bits in your sump scare me very bad news Quote Link to post Share on other sites
aidanep71 Posted January 3, 2015 Share Posted January 3, 2015 Side to side movement is normal.. to me the second rod you moved looked a bit tight if anything ? Quote Link to post Share on other sites
Adam M Posted January 3, 2015 Author Share Posted January 3, 2015 The first rod i moved takes no force atall the others take force to move. And the others are tight. will check clearances and state of bearings soon raining here atm. I didnt know side to side was normal thanks for the info. I also have a video of the previous bid end that went to compare to this time. The sound in the engine was exactly like before tho.Thanks guys all the info reallyHelpsAdam Quote Link to post Share on other sites
5e colin Posted January 3, 2015 Share Posted January 3, 2015 a bit but not excesive like super easy because the rods and loube wals will just grind down/away over time they do move but not easy like loose if there to loose there is to much play thats my 2c Quote Link to post Share on other sites
aidanep71 Posted January 3, 2015 Share Posted January 3, 2015 The rod journal is wider than the rod/bearing same goes for the small end so I don't see why it should move over and back reasonably free if everything is lubricated properly that's my 2c haha Quote Link to post Share on other sites
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