Mustang67ford 234 #1 Posted February 22, 2022 Need to remove one of the engine mounting bolts to add a better ground. Since the block is cast, is there a torque value? Been avoiding this in fear of overtightening and cracking the casting. Share this post Link to post Share on other sites
ebinmaine 72,576 #2 Posted February 22, 2022 ALL bolts have a torque rating. 3/8 course bolt Grade 5 should be around 30, 35 ft lb. 2 Share this post Link to post Share on other sites
lynnmor 7,813 #3 Posted February 22, 2022 I think that you are right by being concerned. If the engine sets well with the bolts completely loose there is less chance of harm, if the engine rocks a bit, adding a shim is helpful. Once setting well I would use about 75% of the usual torque specification due to the soft cast metal. 1 1 Share this post Link to post Share on other sites
953 nut 59,890 #4 Posted February 22, 2022 1 hour ago, lynnmor said: I would use about 75% of the usual torque specification due to the soft cast metal. Your head bolts are torqued at 35 Ft/Lb and are bolted into cast iron also. I'd be afraid that any less torque may result in the bolts not remaining tight. 1 Share this post Link to post Share on other sites
peter lena 9,252 #5 Posted February 23, 2022 @Mustang67ford when you pullout that bolt for an engine to frame ground point , use a serrated washer for secure metal bite , dielectric grease , bolt this on top to have a go to on ignition and headlight , ground wire https://www.amazon.com/Gardner-Bender-GTA-2N-Aluminum-Mechanical/dp/B000MVOX9G/ref=sr_1_8?keywords=Electrical+Lugs&qid=1645576436&sr=8-8 . electrical section in h/w stores have the bolt size lug you want . ground cable from battery ground bolt point , bolted to this corner engine mount area , is easy and really insures your grounding is solid . used 4 ga cable , on first lead , then , 10- 12 ga wire from engine corner to rectifier base bolts , from there to headlight grounding . solid operation on my 3 horses , this set up works , pete 2 Share this post Link to post Share on other sites
ebinmaine 72,576 #6 Posted February 23, 2022 4 hours ago, Mustang67ford said: Need to remove one of the engine mounting bolts to add a better ground FYI. When I'm building a chassis wiring harness I put the large battery ground cable right to a starter mount bolt. 2 Share this post Link to post Share on other sites
Mustang67ford 234 #7 Posted February 23, 2022 2 hours ago, ebinmaine said: FYI. When I'm building a chassis wiring harness I put the large battery ground cable right to a starter mount bolt. Thanks, will take a look at that as well 1 Share this post Link to post Share on other sites
Mustang67ford 234 #8 Posted February 23, 2022 Also seen there are 2 open engine mounting bolt holes not used on the one side where the motor is bolted from below. Could be a good location to mount a ground. 1 Share this post Link to post Share on other sites
ebinmaine 72,576 #9 Posted February 23, 2022 43 minutes ago, Mustang67ford said: Also seen there are 2 open engine mounting bolt holes not used on the one side where the motor is bolted from below. Could be a good location to mount a ground. As long as they don't interfere with anything and the cable that you use also doesn't interfere with anything, that would be a great location for a ground. Share this post Link to post Share on other sites
Mustang67ford 234 #10 Posted March 13, 2022 On 2/22/2022 at 8:41 PM, ebinmaine said: FYI. When I'm building a chassis wiring harness I put the large battery ground cable right to a starter mount bolt. Ended up grounding to the starter as well then jumper up to dash area. 1 Share this post Link to post Share on other sites
