Joined
·
1,530 Posts
Hi gn2beatu,Id like to change THREE things here.
ONE: I would avoid turning counter-clockwise unless you absolutely have too. For one thing, theres no way you should be able loosen the crank bolt thats ~150ft/lbs tight when it should only take ~20ft/lbs to spin a motor over.
Secondly, and most importantly you will back feed the oil out of the pump, and can loose your prime. Not something you want to do.
Last thing, having oil on the back of the bearing isnt goona hurt anything, heck when you pull the bearings out at rebuild time they are always wet anyways. The tabs hold the bearings in place and keep them from spinning. Oiling the whole bearing makes it easier to get in and wont hurt anything. NOW, THAT SAID - when building a new motor or even replacing bearings like this, IF YOU ARE plastigauging the bearings, you dont want to oil the backs as the oil takes up clearance and will give you a false reading. I have been building engines for over 20 years, I have never seen a dry bearing backside from an engine that has been run. So whether you oil it to get it in, or it gets oiled running, its not goona hurt a thing.
Yes you are correct about not being able to loosen bolt, when I originally made write-up I had a loose bolt because I had pulled timing cover off, thus the discrepancy. Thanks for catching this.
In regards to feeding oil back into pump and loosing prime. I had assumed any GTP modder that is brave enough and talented enough to do engine-work of this magnitude understands by now that rebuilt engines never get fired without first disconnecting coil pack harness, and cranking the engine to prime it. For those who forget to oil the cylinders, a shot of WD40 in each cylinder with the help of flexible vacuum hose is a descent alternative. So no real danger in crank direction rotation as long as engine is primed before starting.
I respectfully disagree on oiling the whole bearing to make things easier. Last time I checked, oil is very slippery and hard to work with parts when things are sliding all over the place. And a spun bearing does not respect the locking tabs, so I prefer caution over carelessness because I don't want to do this process again in few weeks if I can help it. However, the point of keeping a clean backside on a bearing is to avoid getting any kind of debris on there that would begin to form scratches. I did find premature wear on a bearing I replaced this way where I did not take good care to be careful in keeping backside of bearing clean. That's one of my lessons learned.
I may be redoing this procedure again in next few weeks, so I will take photos and post if you guys are interested, as well as adding any other "lessons learned" by all who helped contribute to this post.
Thank you,