2G 6 bolt or 7 bolt

[Brandonjffrs96]

some guy was was interested in my car said that this makes it a 6 bolt? he went ape shit aftter that calling me a scammer. not sure wtf i have so please inform me.

 

[91talonts1]

That's a 1g cam angle sensor. It doesn't necessarily mean your engine is a 6 bolt. Easiest way to tell which block it is would probably be by the oil pan.

 

[Brandonjffrs96]

That's a 1g cam angle sensor. It doesn't necessarily mean your engine is a 6 bolt. Easiest way to tell which block it is would probably be by the oil pan.

thats what my brother said, how do i check that?

 

[91talonts1]

6 bolt pan is flat where it meets the front case. 7 bolt is rounded there.

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[Sniffbooger]

Also, the 6 bolt block is more skinny and has one less bolt for the bell housing. It can be seen if you still have the transmission from the 7 bolt connected.. You may see a missing bell housing bolt just under the #4 cylinder exhaust port area (front of engine passenger side). The bell housing from a 7 bolt won't match up exactly with a 6 bolt block.

Besides, a 6 bolt swap is usually considered desirable modification for a reliable bottom end and to avoid the crank bearing issues of some early 7 bolt engines.

 

[19Eclipse90]

Also, the 6 bolt block is more skinny and has one less bolt for the bell housing. It can be seen if you still have the transmission from the 7 bolt connected.. You may see a missing bell housing bolt just under the #4 cylinder exhaust port area (front of engine passenger side). The bell housing from a 7 bolt won't match up exactly with a 6 bolt block.

This is a difference between 1G and 2G engine blocks, not necessarily a difference between 6- and 7-bolt. Remember there were 1G 7-bolt engines. And the 1G 7-bolt block is, in some ways, like the 6-bolt engine, including how many bolts there are connecting the block and transmission.

Oil pan method is pretty fool-proof.

 

[Sniffbooger]

Ahhh the wise man speaks! Thank you for the clarification!! So in my post above, I would be describing a 1g 6 bolt skinny block, mated to a 2 g transmission if there was a missing bell housing bolt near the #4 cylinder.... Or that could also be a 1g 7 bolt block...it's not a perfect indicator...

 

[19Eclipse90]

I hear ya, and you're not wrong. All I'm saying is that looking at that particular detail isn't enough to definitively determine whether the block is a 6-bolt or 7-bolt because the 1G 7-bolt exists and would look identical to a 6-bolt engine in that regard.

Missed your ninja edit. You've got it! Oil pan is going to be a simple and easy check for anyone. There's plenty of other ways if the oil pan just doesn't do it, though.

 

[Sniffbooger]

Good information. So the 6 bolts were really only the first few years...maybe up to 1993 or so...

 

[19Eclipse90]

Changeover in April of 1992. So there are some '92 model year 7-bolts as the model year changed over in June if I recall correctly, but most 1992 models are 6-bolts. 1993 and 1994 models were all 7-bolts.

 

[spyderdrifter]

As an additional comment, I've run the 1G CAS on several 2G 7 bolt engines with no issues. So like it was said, just because the 1G CAS is there, it doesn't immediately mean there's a 6 bolt engine. I even ran a 1G CAS on a 7 bolt with confirmed crankwalk just so I could make the engine last a couple weeks longer until I had the time to replace it.

 

[1990TSIAWDTALON]

A Honda distributor will even fit there

 

[Sniffbooger]

A Honda distributor will even fit there

Ummm...does it work??

 

[1990TSIAWDTALON]

It would if we had an intake for a carb. It is the same size as the CAS and happens to have the same slots in the bottom to engage in the cam. We had a 89 Accord that I was comparing it to and I am sure it would bolt in, then just run a coil and a carb. My son and I both laughed when we saw it probably would work. IDK if Mitsu ever had a carbed motor that had an intake that would bolt up to ours tho.

 

[Sniffbooger]

The coil is inside the distributor on the civic distributor I have from '95...but it probably is not enough juice to push a spark under high boost conditions....but that would give the cam signal... although it would fry the ECU!

 

[1990TSIAWDTALON]

Not for ecu use, only battery, starter, coil, fuel pump or gravity feed and distributor. I was thinking of making a "run in" stand if I could find an intake and carb so I could run in all of my 4g motors.