eclipse 6 bolt engine??

[jdmeg]

i was looking at some dsm sites and they were taling bout 6 bolt engines. they were making this a big deal. i dont know what this is so i wasnt to interested. if there a difference from the 6 bolt and stock?? or are the both the same?? any other info would be appreciated.

[Dayzii]

Generally more bolts per engine means an all round stronger engine according to a mag i read recently...

The reveiw was of a built up SC400(lexus V8 soarer) and they said the engine was hella strong because of the "6 bolt mains"
Coincedently the car that was reviewed was only 3 suburbs away from where i live

[jdmeg]

where can you get this 6 bolt engines?? are they hard to come by?? are they like jdm engines or something? can someone explain.:drink:

[markGSX]

taken from the 1000 DSM questions already answered page: (http://members.shaw.ca/costall/1000Q/search-dsm.htm)


What is a 6-bolt engine?
What is a 7-bolt engine?
A 6-bolt engine is one that has a 6-bolt flywheel - that is, there are 6 bolts holding the flywheel to the crankshaft. A 7-bolt motor has 7 bolts there.

Along with the flywheel change, there are many other internal changes between the two engines. The crankshafts are different sizes, as are the rods and crankshaft seals. 6-bolt motors have 'big' rods, while 7-bolt engines have 'small' rods. The journal and bearing widths different, although the bearing diameters are the same.

There may also be other changes between the two engines, and the parts are not interchangeable.

DSM's produced from 89-4/92 came with the 6 bolt motor. 5/92 and up came with the 7 bolt. A 6 bolt motor swap is popular for 2G eclipses because many 7 bolts were produced with defective thrust bearings. (http://members.shaw.ca/costall/1000Q/answers-terms.htm#whatiscrankwalk)

7 bolts motors are more expensive and harder to find, so it doesn't make sense to buy a used one. You can buy a used JDM 6-bolt motor for very cheap. Most of them are off Galant VR-4s. It should also be mentioned that 7 bolt motors produce approximately ~10 HP more stock, because of higher compression pistons.

[firefly1_0]

Originally posted by markGSX
defective thrust bearings. (http://members.shaw.ca/costall/1000Q/answers-terms.htm#whatiscrankwalk)


i've had to custom make a few sets of thrust bearings for the 2g DSM at work. its hella fun.

[XplicitGST]

Basically the difference between the 6 bolt and 7 bolt motors is 1 bolt. Seems a few people cant decided where that extra bolt goes. :anal:

[CoNFuSioUs2002]

Originally posted by XplicitGST
Basically the difference between the 6 bolt and 7 bolt motors is 1 bolt. Seems a few people cant decided where that extra bolt goes. :anal: haha

same with the rear ends

[91 talon]

OMG! Are you effing serious?! If you don't know what a 6 bolt engine is, and a 7 bolt engine is, you need to read ALL of the VFAQ, or the 1000AAQ.

[Fenrir]

It's great when you get lucky and your car has 6 AND 4 bolts. :bow:

[XplicitGST]

Originally posted by Fenrir
It's great when you get lucky and your car has 6 AND 4 bolts. :bow:

I got one, and im selling it. :P

[CoNFuSioUs2002]

Originally posted by Fenrir
It's great when you get lucky and your car has 6 AND 4 bolts. :bow: out of curiousity what month was your car built, i heard may was the cut off but i heard there were many 6/4's built until september (i got one built june), i guess i just need to get under the car and check the oil pan.

[Fenrir]

From what I've consistantly seen it's usually 5/92. They say some 7 bolts snuck into late may cars but there is no way to know the real numbers.

4/92. If only it wasn't teal. :barf:

[MR2ownr]

If you have any questions about DSM's hit up my man Tyson. Here's his web page: http://www.cardomain.com/id/dsm2lturbo
His web site has a few ways to contact him, he's a cool guy and knows his shit. Peace

[SpeedKillz]

Ok heres the deal 7 bolts are crap They love to crank walk. And dont give me the statistics on how rare it is several of my friends with 95 and up cars have walked.(Crank walk) Thanks to mitsubishi machining some bad parts.

any way hereswhy seven bolts are crap.

If there is a clicking noise coming from the crank pulley area this is the clicking noise you hear when the trigger plate is hiting the crank angle sensor. in other words CRANK WALK! if thats the case scrap together what you can and by a 1g 4g63 6 bolt.

heres what to keep off the 2G
Mitsubishi 2G Manifold(1g manifold cracks from heat/stress)
Mitsubishi 2G Pistons
I do beleive theres more but i cant think of them at the moment.

Oh yeah and when you get the 1g motor if it is a JDM motor ditch the Cyclone intake manifold it is crap.

another way to tell is if you have difficulty engaging your clutch or your clutch pedal drops to the floor.

This is why alot of 2g owners swap the jm 1g engine into their cars if you have a mid 92 or below yu do ot need to swap the motor.
:3gears:

[CoNFuSioUs2002]

no, not all 7 bolts are crap, 95+ 7 bolts are crap, 1st gens wtih 7 bolts barely ever crankwalk.

also the 2nd gen manifold is beter because it flows more, put a 2nd gen exhaust manifold and a 1st gen next to eachother, the 2nd gen is bigger, i don't know about you but every used manifold i have seen of a 2nd gen has had 2 cracks on the diffuser type thing in the middle of the side where the turbo bolts up.

[fusionsport]

I have conflicting reports about the flow numbers of 2g intakes vs 1g intakes. the 1g intake has larger ports and larger throttle body, and needs less work to port match to the 1g head.the 1g cyl head has much much better ports and flow than a 2g. i think the 2g is a physically bigger intake but its the ports and flow I am concerned with.. road/race has some good pictures of the two intakes right next to each other