corrupt Posted December 15, 2007 Share Posted December 15, 2007 how did you go about bedding them in? Quote Link to comment Share on other sites More sharing options...
fuel Posted December 15, 2007 Share Posted December 15, 2007 dude as long as you torqued the head bolts to 54ft lbs I wouldn't worry about re-torquing the head right away. I did 100kms in my original engine after I put the head back on after blowing a gasket before I re-torqued the head bolts, and then another engine we put together we didn't even re-torque the head bolts. I think most modern head gaskets don't require re-torquing. As for running it in, best way I reckon is to give the engine a bit of load, but don't thrash the bejesus out of it. Don't let it idle for too long and don't let it sit at constant revs for too long either, ideally you want to constantly vary the load and speed on the rings to aid with bedding them in quicker. Just drive it around as you would normally I reckon, but just bare in mind the varying of the load. Quote Link to comment Share on other sites More sharing options...
corrupt Posted December 15, 2007 Share Posted December 15, 2007 what about oil? just normal 15w40? or some sort of running in oil? Quote Link to comment Share on other sites More sharing options...
LAN_KILLA Posted December 15, 2007 Share Posted December 15, 2007 This makes a fairly good read http://www.mototuneusa.com/break_in_secrets.htm used a similar approach when running in my motor, got out of the driveway and just opened it up (pretty much). One thing I find that did help though was going down a rather large hill at about 4000rpm completely off the throttle, before hand i was hard up it, and i was hard up it again after the hill. But the general idea I was given from the mechanics i talked to was drive it hard, if you sit there going easy on it or let it idle (even a fast idle) the rings are just going along for the ride Quote Link to comment Share on other sites More sharing options...
corrupt Posted December 16, 2007 Share Posted December 16, 2007 The engine is all primed up now ready for its first start up, the bearings and piston rings are brand new. What do I do exactly? let idle for a little bit? drive straight away? put load on straight away? etc someone please enlighten me! Quote Link to comment Share on other sites More sharing options...
fuel Posted December 16, 2007 Share Posted December 16, 2007 hey dude, not sure if it's too late already. Just start it up as usual, let it warm up first but just vary the idle like blip the throttle every few seconds or so, and just start driving it like normal. Once it's fully warmed up then go with the running in method. 15W40 mineral oil is fine, I wouldn't use a synthetic oil for running in but that's just me. I used 20W50 for the 4G37 me and pete built and 15W40 for the 6A12 I built. It's just going to get dumped out within 500kms anyway so I wouldn't worry if it's high quality or not Quote Link to comment Share on other sites More sharing options...
corrupt Posted December 16, 2007 Share Posted December 16, 2007 awesome, i was shitting myself that i had done it wrong for a bit. but it is more or less what i done. I did have a little scare when i noticed dripping water under the car pretty much under the cambelt cover... luckily it was just the overflow bottle phew! how long do you reckon I need to drive via the running in method for? until the first oil change at 500km? and also, segedins are good cunts. the engine reconditioners ordered me the wrong main bearings and piston rings, so on saturday i shot down to segedins and got the right parts and im pretty sure they gave me trade price, rings were 55+gst and main bearings were 35 this was much cheaper than the incorrect parts i was supplied which i will be returning on monday Quote Link to comment Share on other sites More sharing options...
ProZac Posted December 16, 2007 Share Posted December 16, 2007 I used repco 15w40, drove it normally but not overly hard for 500k's or so. Gave it death after that . Quote Link to comment Share on other sites More sharing options...
Unclejake Posted December 16, 2007 Share Posted December 16, 2007 If you are certain the rings have not bedded and you don't want to fix it by ripping down the motor again then an old trick is a bit of brasso in the fuel to act as a bedding agent. I have never done this and I expect it is rather bad for the bearings Quote Link to comment Share on other sites More sharing options...
fuel Posted December 16, 2007 Share Posted December 16, 2007 awesome, i was shitting myself that i had done it wrong for a bit. but it is more or less what i done. I did have a little scare when i noticed dripping water under the car pretty much under the cambelt cover... luckily it was just the overflow bottle phew!how long do you reckon I need to drive via the running in method for? until the first oil change at 500km? and also, segedins are good cunts. the engine reconditioners ordered me the wrong main bearings and piston rings, so on saturday i shot down to segedins and got the right parts and im pretty sure they gave me trade price, rings were 55+gst and main bearings were 35 this was much cheaper than the incorrect parts i was supplied which i will be returning on monday Yeah just change oil within the first 500km or so anyway, as there will be a bit of metal shavings and debris in there from the rings and bearings bedding in etc. I used cheap valvoline 20W50 then switched to 15W40 and then go to your normal semi-synth oil after 2000kms or so. Quote Link to comment Share on other sites More sharing options...
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