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Old 05-31-2012, 10:29 AM
SteveH SteveH is offline
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Default '78 2F Vacuum secondary question

I just rebuilt my '78 FJ40 carb (OEM) after doing it, um, 22 years ago. Note to self: don't wait that long. While none of the old parts showed any wear, really, the vehicle starts with less choke and runs smoother.

I used a Carquest carb kit that included a new vacuum secondary diaphragm. The kit did not show any gaskets to be used where the 'block' of the secondary bolts to the carb, but I used a likely-looking cardboard o-ring. After doing the paperclip test, my secondary is not opening (and I know the vacuum port to it is clear). The FSM doesn't show a gasket that I could see, but SOR does.

Can I just use a rubber o-ring for this gasket? I'd rather not use RTV, as is hard to control in such a tiny area.

Thanks - Steve
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'78 FJ40, '89 FJ62, '98 4Runner
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Old 05-31-2012, 11:26 AM
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subzali subzali is offline
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My memory is fuzzy, but I thought the diaphragm was the gasket...
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1977 FJ40 2F "Brahma" + Lockright, tach, Warn 8274, FJ60 Power Steering, soon to lose the Sanden OBA to go back to factory emissions
1996 FZJ80 1FZ-FE factory lockers + Safari Turbo , CDL switch, cup holder, Metric TLC leather, heated seats and JDM switches
2000 Tundra Limited TRD 2UZ-FE SOLD
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Old 05-31-2012, 12:21 PM
SteveH SteveH is offline
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There's a tiny cavity where the secondary body attaches to the carb - that's the gasket I need. (Yes, on the secondary itself, the diaphragm is the gasket).

http://www.sor.com/shared/image/042A.gif - see part #24.....
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'78 FJ40, '89 FJ62, '98 4Runner
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Old 05-31-2012, 01:28 PM
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subzali subzali is offline
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have you tried Toyota?
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Matt Miller
TLCA# 13684
Rising Sun Bio
1977 FJ40 2F "Brahma" + Lockright, tach, Warn 8274, FJ60 Power Steering, soon to lose the Sanden OBA to go back to factory emissions
1996 FZJ80 1FZ-FE factory lockers + Safari Turbo , CDL switch, cup holder, Metric TLC leather, heated seats and JDM switches
2000 Tundra Limited TRD 2UZ-FE SOLD
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