Engine Mounts, Engine Mounts |
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Engine Mounts, Engine Mounts |
Not_A_Six |
Dec 1 2018, 12:18 PM
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#1
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Member Group: Members Posts: 110 Joined: 28-November 18 From: North Idaho Member No.: 22,682 Region Association: Pacific Northwest |
Hi All-
New member here. I have the engine out of my '73 2.0 to address some fluid leaks and noticed that the engine mounts were unusual. Going through old paperwork, I found that a PO had installed "Club/Sport" engine mounts 15 years ago. The car is a '73 with stock side-shift trans and cross bar with the hole in it for the trans linkage. But the engine is mounted to the crossbar with solid aluminum blocks and the crossbar is mounted to the chassis with rubber -- similar to the older style tail shift factory mounts -- instead of the inboard rubber+outboard solid mount expected. I'm inclined to return it to stock, but I'm trying to understand the purpose of the "Sport" mounts. Online searches suggest that 911 "Sport Mounts" are used somehow for /6 conversions, but I don't know why PO changed from the stock mount with the factory 2L engine/trans. Thanks for your help. FWIW, pic of my baby is attached. |
bbrock |
Mar 6 2021, 11:38 AM
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#2
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914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains |
Anyone know the torque spec for the nuts securing the rubber mounts? Don't see it in the factory shop manual.
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Superhawk996 |
Mar 6 2021, 12:59 PM
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#3
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914 Guru Group: Members Posts: 5,903 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch |
Anyone know the torque spec for the nuts securing the rubber mounts? Don't see it in the factory shop manual. @bbrock I believe it is 21.7 Nm per Hanes manual (Engine support nuts - Body). As a 2nd rationaltiy check here is the standard torque table for black oxide fasteners. 26 Nm for an M8 grade 8.8. I'd go with the Haynes spec. |
bbrock |
Mar 6 2021, 03:11 PM
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#4
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914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains |
Anyone know the torque spec for the nuts securing the rubber mounts? Don't see it in the factory shop manual. @bbrock I believe it is 21.7 Nm per Hanes manual (Engine support nuts - Body). As a 2nd rationaltiy check here is the standard torque table for black oxide fasteners. 26 Nm for an M8 grade 8.8. I'd go with the Haynes spec. That torque spec in Haynes is for the outer bolts that attached the steel support to the body. And if they say Nm, they are wrong. The factory manual clearly specs those bolts as M10 and 21.7 ft.-lbs. Way too much for an M8 bolt. I wound up using that exact same torque chart you found (almost). The table you reverenced is for untreated screws (black finish). If you scroll down to the table for zinc plated fasteners, it speces 17.7 ft.-lbs. I was guessing 18 ft.-lbs. so pretty much spot on. I didn't know if there would be adjustment for the rubber mount factor but as I thought about how they are made, there shouldn't be. Anyway, I went with 18 ft.-lbs. which I think should be fine. |
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