7A-FE connecting rod bolts, Is the BGB specification incorrect? |
7A-FE connecting rod bolts, Is the BGB specification incorrect? |
Dec 9, 2017 - 3:33 PM |
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Enthusiast Joined Apr 24, '14 From Durham, NC, USA Currently Offline Reputation: 0 (0%) |
Beginning to rebuild my Celica ST 7A-FE engine (finally).
Page EG-132 of the repair manual asked me to measure the DIAMETER of the connecting rod bolts (at the measuring point - some 20 mm from the head of the bolt). They specify the standard diameter: 8.860 - 9.000 mm (0.3488 - 0.3543 ") And the minimum diameter: 8.60 mm (0.3386") My bolts measured about 7.22 mm (0.284"), which is less than the minimum, which means I need to buy new bolts. Then I checked my Haynes manual and found they had a different minimum bolt diameter spec of 0.2992". Still, my bolts are 0.015" smaller than the minimum and I still need to buy new bolts, BUT. . . The Toyota manual spec seems so much larger than my bolts, AND the Haynes manual spec is quite close, so I question whether Toyota has a mistake in their manual, and would like to know if anybody has a correct spec for this bolt, or can tell me where I might find it. I am suspecting that I would not get much help if I called Toyota. Maybe I am wrong. |
Dec 9, 2017 - 10:39 PM |
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Enthusiast Joined Dec 8, '03 From Lancaster CA Currently Offline Reputation: 6 (100%) |
you are doing a good job at reading the specs and following directions. Toyota manuals i use as gospel over a haynes or chiltons. Now here is my 17+ years of experience in building toyota engines. use the original bolts. unless you are building a monster HP engine out of a 7A, use the original bolts and save your money. this is a 7A you are building. its not a high revving engine, it dont make any power. you will be just fine.
-------------------- 2001 Celica GT-S Turbo
1997 Supra TT 6speed 1997 Celica 3MZ/1MZ swap 1990 Celica All-Trac |
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