GV Z Car Posted July 10, 2016 Share #1 Posted July 10, 2016 Wondering if anybody else has gone down this road. Purchased engine mount insulators (aftermarket) for a '71 240Z....noticed the pilot hole does not line up. Should I.. 1) Grind off the pilot hole "peg". 2) Drill a new pilot hole on the cross member (hate to do that...spent a lot of time/ money eliminating holes on the shell). 3) Search for a different Engine mount insulator. Link to comment https://www.classiczcars.com/topic/55775-engine-mount-insulator-pilot-hole-issue/ Share on other sites More sharing options...
siteunseen Posted July 10, 2016 Share #2 Posted July 10, 2016 I just went through this too! Bought some and found that then bought another set, same thing. I ended up using a modified Beck Arnley set. I wish I'd taken a picture for you but what I did was take a flat file to the circle. I filed it and checked, filed more checked more until it finally sat flat. The best way I can describe it would be make a D shape out of the O. Once you get the it all bolted up and the weight of the motor on there, there won't be any movement. I've checked mine time and time again during the break-in, I've got about 500 miles on there now and all is good. Oh yeah, use the thickness? side of the file and put the mounts in a bench vise. My file was about 1/4" thick and that's about the same as the dimple. One more oh yeah. Those cheap a** "Anchor" brand are trash, the rubber doesn't even line up with the motor mounts. The Beck Arnley's were the best I could find on my budget. Link to comment https://www.classiczcars.com/topic/55775-engine-mount-insulator-pilot-hole-issue/#findComment-498475 Share on other sites More sharing options...
Zed Head Posted July 10, 2016 Share #3 Posted July 10, 2016 Do you mean the peg, not the circle? Basically made a 1/2 peg? You could also file the peg down flat,then drill and tap a hole n the right spot. Run a small bolt through, or just a press fit rivet in an unthreaded hole, and you have a new peg. Looks like the mounts changed in 73. http://www.carpartsmanual.com/datsun/Z-1969-1978/engine-240z-260z/engine-mounting/manual-from-c-hls30-46001-rls30-grls30 Link to comment https://www.classiczcars.com/topic/55775-engine-mount-insulator-pilot-hole-issue/#findComment-498476 Share on other sites More sharing options...
siteunseen Posted July 10, 2016 Share #4 Posted July 10, 2016 Yes, the peg is what I filed down. The ones I have didn't require too much material be removed. Link to comment https://www.classiczcars.com/topic/55775-engine-mount-insulator-pilot-hole-issue/#findComment-498477 Share on other sites More sharing options...
siteunseen Posted July 10, 2016 Share #5 Posted July 10, 2016 The Anchor brand also had the nuts welded on already. Link to comment https://www.classiczcars.com/topic/55775-engine-mount-insulator-pilot-hole-issue/#findComment-498478 Share on other sites More sharing options...
GV Z Car Posted July 10, 2016 Author Share #6 Posted July 10, 2016 I think I might try filing the peg down. Thanks siteunseen. Link to comment https://www.classiczcars.com/topic/55775-engine-mount-insulator-pilot-hole-issue/#findComment-498479 Share on other sites More sharing options...
GV Z Car Posted July 10, 2016 Author Share #7 Posted July 10, 2016 Zed Head, thank you for the response. Most of the aftermarket motor mounts offered now are a "one-size-fits-all" (70-78 years) now which looks like is not true for the 70 -72 models without modification. OEM versions are nla. Link to comment https://www.classiczcars.com/topic/55775-engine-mount-insulator-pilot-hole-issue/#findComment-498480 Share on other sites More sharing options...
siteunseen Posted July 10, 2016 Share #8 Posted July 10, 2016 You are very welcome, glad I could pass along a problem's solution as you've discovered above. One size does not fit all. 1 Link to comment https://www.classiczcars.com/topic/55775-engine-mount-insulator-pilot-hole-issue/#findComment-498481 Share on other sites More sharing options...
GV Z Car Posted July 10, 2016 Author Share #9 Posted July 10, 2016 After going to look closer at the alignment of the pilot pin it appears that I would file off most of it to have it line up. Question I have is why not just shear the whole pin off? Does it add any structural support for the engine mount? I suspect it just helps in the alignment of the actual motor mount bolts to the insulator. I am thinking with the pilot peg sheared off one would have to be careful when installing the engine but could get around not having the alignment pegs on the insulator. Any thoughts? Link to comment https://www.classiczcars.com/topic/55775-engine-mount-insulator-pilot-hole-issue/#findComment-498486 Share on other sites More sharing options...
siteunseen Posted July 10, 2016 Share #10 Posted July 10, 2016 I thought about that too and decided it was more for orientation purposes. With the transmission mount added into the overall stability of the motor you would probably be okay doing that. But having what little bit of peg I had left I was able to get the mounts flat on their mating mounts. That centered bolt may need some help keeping it straight up and down was my thinking. Link to comment https://www.classiczcars.com/topic/55775-engine-mount-insulator-pilot-hole-issue/#findComment-498488 Share on other sites More sharing options...
siteunseen Posted July 10, 2016 Share #11 Posted July 10, 2016 Whatever you decide to do, shoot the newly exposed raw metal with some spray paint to prevent future rust on the backside. Link to comment https://www.classiczcars.com/topic/55775-engine-mount-insulator-pilot-hole-issue/#findComment-498489 Share on other sites More sharing options...
siteunseen Posted July 10, 2016 Share #12 Posted July 10, 2016 I replaced the transmission insulator too. They're available from nissan dealerships still. P/N 11320-N3000, $75 Link to comment https://www.classiczcars.com/topic/55775-engine-mount-insulator-pilot-hole-issue/#findComment-498491 Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now