Tidy_Andy 0 Posted December 10, 2006 Now i ve got my new cylinder head from DJ mini i thought its about time i finally got my MI put back together Whats the best way to remove the old bolts from my conrods an how do i need to fit the new ARP ones? the packet got opened about 12 months ago an the instructions seem to have dissapeared into the blackhole known as our garage Share this post Link to post Share on other sites
Sandy 191 Posted December 10, 2006 Press out the old bolts in a vice to avoid impact damage and press in the new bolts as far as possible and the tightening process will finish it off. Spec tightening is 35lbft and slacken twice, then 35lbft. Use the ARP lube on the threads and nut shoulders or the torque will be wrong. Use great care, i've had one strip before despite the procedure being followed to the letter. Share this post Link to post Share on other sites
PumaRacing 2 Posted December 10, 2006 No vice needed. Screw a nut onto each bolt until it's just proud of the end of the bolt. Tap lightly with a hammer, preferably a brass one but a normal one will do. The bolts will tap out quite easily. Tap the new ones in. Sometimes they'll twist a bit as you tap them in and you have to back them out, turn them a bit and try again to get the heads in the right orientation. You can also lever the heads with a screwdriver before they're fully home to get them pointing right. Slap a bit of the moly lube onto the threads, tighten to 30 ft lbs, release and repeat two more times. This beds in the threads between the nut and bolt and reduces friction levels. You should do this with all new rod bolts, ARP or otherwise. Finally tighten to 35 ft lbs. You'll find there's ten times more moly lube in the sachet than you actually need. I'm still fitting ARPs with a sachet that came with some bolts several years ago. The rest have stayed unopened in anticipation of the world moly lube crisis when I'll be able to bang them out on Ebay for a couple of quid a pop. Share this post Link to post Share on other sites
Tidy_Andy 0 Posted December 10, 2006 Cheers. I ll make up a dolly to hold the rods an take them into work tommorow to use the press there. Theres no point damaging the rods just for the sake of getting the job done today Share this post Link to post Share on other sites
M3Evo 0 Posted December 10, 2006 Seriously, you can just hold the rod in one hand and tap the bolts out with a hammer in the other hand. Be sure to check the bolt heads seat correctly in the rod too. The instructions say to make sure there's enough of a chamfer in the rod and sure enough when I checked a set in some Mi16 rods, there wasn't enough of a chamfer to clear the radius under the bolt head! If you don't already, I'd recommend using a snail type countersink to generate the chamfer as they don't chatter Share this post Link to post Share on other sites
Sandy 191 Posted December 10, 2006 You been lucky, most of the ones i've done have been pretty solid in there. Share this post Link to post Share on other sites
PumaRacing 2 Posted December 10, 2006 Seriously, you can just hold the rod in one hand and tap the bolts out with a hammer in the other hand. Well I can and clearly you can I tried to teach my assistant how to do this last year. I removed the bolts from one rod while he watched. I gave him another rod, he screwed the nut on, swung the hammer, missed the nut and whacked the rod where the bearing shell sits. Christ he was cackhanded. He didn't last long. Share this post Link to post Share on other sites
Tidy_Andy 0 Posted December 10, 2006 Thanks for all the advice. I shaped a block of wood to snugly hold the rods an braced it with some box section + thredded bar this afternoon. The bolts are soaking in penatrating oil over night too so it shouldnt be much of a battle. Maybe its complete overkill but I feel like I ve done something usefull with my day and I ve got 3 other engines to do when this ones out the way so it will get some use. Share this post Link to post Share on other sites
Sandy 191 Posted December 10, 2006 (edited) Well I can and clearly you can Very impressive. But not as impressive as the size of your head. We all have different approaches to engine building clearly. Edited December 10, 2006 by sandy309 Share this post Link to post Share on other sites
PumaRacing 2 Posted December 10, 2006 Very impressive. But not as impressive as the size of your head. We all have different approaches to engine building clearly. Where did that spring from? Do you have some issue you want to get off your chest? Share this post Link to post Share on other sites
Sandy 191 Posted December 11, 2006 Your first post on this thread firstly starts by dismissing my suggestion of using a vice, then you duplicate (as good as) the tightening advice I gave. I then mention that alot of the rod bolts I've removed would not have come out easily with a hammer blow, so you quote M3EVO's post about hammering them out and say "Well I can and clearly you can smile.gif"; which is a subtle way of saying I'm not capable of it, but just about vague enough to give you a climb down if I respond. Smug, arrogant and dismissive of my credibility and method. Share this post Link to post Share on other sites
smighall 1 Posted December 11, 2006 There are many ways of skinning a cat, just do whatever works best for you. As long as the end result is the same who cares how you did it! Share this post Link to post Share on other sites
PumaRacing 2 Posted December 11, 2006 Your first post on this thread firstly starts by dismissing my suggestion of using a vice, Oh dear. So as soon as you've opined on something no one else can offer different advice without you throwing a hissy fit eh? Grow up kid. then you duplicate (as good as) the tightening advice I gave. You should be happy I agreed with you on that bit. I then mention that alot of the rod bolts I've removed would not have come out easily with a hammer blow, so you quote M3EVO's post about hammering them out and say "Well I can and clearly you can smile.gif"; which is a subtle way of saying I'm not capable of it, but just about vague enough to give you a climb down if I respond. I was talking about my useless assistant but if you're paranoid enough to think I give a damn one way or the other about you, your capabilities, who the hell you are even or waste a minute of my time putting you down then so be it. You flatter yourself too much. Smug, arrogant and dismissive of my credibility and method. You've been sulking ever since something about torque wrenches I think it was, or maybe because the first TU engine I get involved in blows away everything you've ever seen before. Whatever. Deal with it. Share this post Link to post Share on other sites
Sandy 191 Posted December 11, 2006 You've been sulking ever since something about torque wrenches I think it was, or maybe because the first TU engine I get involved in blows away everything you've ever seen before. Whatever. Deal with it. That's the best bit Share this post Link to post Share on other sites
