Toyota bellhousing bolts

firewood

Active Member
Joined
Dec 2, 2010
Location
Denton, NC
Does anybody know the bolt size/thread pitch of the bolts that hold the transmission to the engine on a 94 toy truck? It is a 22r. The bolts that I have are currently holding my transmission to the bad engine. I need some more so I can put my New engine on the engine stand.
 
Fabrik8 said:
M12x1.25, don't know the length.
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this.
M12 is 17mm head in a J-spec bolt.
Be careful, if you go to the hardware store, or even most fastener places, the metric bolts tend to be E-spec and an M12 will have a 19mm head and be 1.5 or 1.75 pitch. Jap metric bolts are different.
 
Yep, you'll find 18mm or 19mm heads (ANSI/ISO or DIN) locally unless you get JIS from a parts store that carries such things. Doesn't matter a bit for an engine stand, so get whatever you want as long as the thread pitch is correct and its not some poorly made pile of crap bolt.
 
Fabrik8 said:
Yep, you'll find 18mm or 19mm heads (ANSI/ISO or DIN) locally unless you get JIS from a parts store that carries such things. Doesn't matter a bit for an engine stand, so get whatever you want as long as the thread pitch is correct and its not some poorly made pile of crap bolt.
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I always wondered why the bolt heads differed in sizes. I knew about diameter/pitch but I never realized there were different specs for the bolt head sizes. Learn something new everyday.
 
I've found them in the fastener section at Advance Auto before. Help! brand, and a couple of bucks a piece.
 
I went to advance yesterday. They didn't have anything in stock bigger than a M10. Went to a local store, Automotive Fasteners. They had the Jspec with the 17mms head size. Bought 8 of them for a little over $6.
 
You were lucky. Lowes sells the M12-1.25 80mm bolts for 5.80 each. I couldn't find any cheaper around town. Cost me $25 to mount my engine to the stand.
 
firewood said:
I went to advance yesterday. They didn't have anything in stock bigger than a M10. Went to a local store, Automotive Fasteners. They had the Jspec with the 17mms head size. Bought 8 of them for a little over $6.
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Yep, fastener store - especially an automotive fastener store is the shizzit when it comes to this kind of thing.
You'll notice also that places like that have flange-head bolts on hand; which is what fast majority of bolts on cars are, whereas hardware stores (and Advance, etc, ugh) just have regular hex-head.
Napa is also generally high probability of having them. Advance and autozoo do too... in the back... or in specific parts bins... but 80% of the employees don't know it.

The J-spec vs E-spec thing is really annoying, but once you learn how it works it's easy to spot and you knwo exactly what to get.
Basically in J-spec automotive, anything between M16 and M12 is 1.25 pitch. IIRC M14 is 1.5 and M17 may be 1.75. So the point is, on a Toy truck almost all bots are 1.25.
Also the head-to-shank ratio is smaller- to save weight - than E-spec, basically by 1 size.
J... M8=12mm, M10=14mm, M12=17mm, etc,
while
E...M8=13mm, M10=17mm, M12=19mm, etc.
and the thread pitches are all different.
 
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