1st Gen 6/7 Bolt Differences

[OMFGeofffff]

I've been waiting almost 2 weeks to find a place to do my clutch and finally got to do it today at my buddies house. Well me being a noob and working by myself 6 hrs later I finally get to the flywheel and bam! There's 7 bolts staring me in the face. So guys.... what are the differences besides cranks?

 

[The_Big_Weave]

I know that rods are different.

 

[beaner]

Weaker rods and head bolts (11mm vs 12mm). The crank girdle is redesigned and the oil pan is a different shape. Otherwise I can't really think of any other main differences.

 

[pot]

To add whats has already been cited there remain quite a few differences to include:

- compression ratio
- Crank Angle Sensor/Cam Angle Sensor

Please check out the site listed below for more detailed information:

Vfaq

 

[OMFGeofffff]

According to this my compression ratio may be the same as a 6bolt? And I don't have a crank sensor?

 

[TRBODSM]

The timing marks and timing belt tensioner are different also.

 

[beaner]

+1 on the timing stuff.

99.9% sure the 1g 7bolts are the same 7.8:1 cr.

I also remembered if you want to run a 1g 7bolt head on a 6bolt block, you'll have to drill out the holes in the head to .5" for the 12mm bolts.

I popped my 6bolt two years ago and came across a 1g 7bolt longblock for 300 bucks. Swapped right in and ran money for about a year, daily drove it. Then out of nowhere the clutch would get soft if I went for a left and eventually would always stall after pushing the clutch at a stop light. /ubbthreads/images/graemlins/banghead.gif I've always known the cw problem to be a 2g 7bolt thing and the 1g 7bolts were fine. Maybe I had that rare case of any motor can crankwalk but I'll never touch a 7bolt again as far as building/swapping.

 

[jepherz]

Oil pan per VFAQ.

 

[pot]

I'm w/ you Beaner. I suspect the compression ration on the 1g block is the same regardless of six or seven bolt. I jumped on the thread too soon.