6 Bolt vs 7 Bolt

[Blackcrow64]

Originally Posted by crunchymilk55

don't know how I missed this thread....

there are several theories on what causes crankwalk. Personally I believe that mitsu had a defective mold when building the engines. If this is the case, there isn't any cure for crankwalk. Other theories like oil squirters etc. don't really make much sense to me. Otherwise they would all walk around the same time, but that's not the case. It doesn't really depend on how much you mod it or how hard you drive it, which helps me believe the mold theory.

Personally I think the "crank walk" fixes out there are completely BS. If a 7bolt is going to walk, it usually does before 100k, if my 7 bolt makes it past this, then I will probably never switch to a 6bolt, no point. The power differences for someone with my type of setup just are not that apparent.

See, I have wondered too about the molds being different but don't have any way to compare the two. Has anyone seen a comparison picture anywhere online for this? Also, mine walked at 105k miles which makes no sense to me if it is indeed the mold. See, I changed to a 2600 lb clutch at about 90k miles... So if it is indeed the crank theory then that would put it at about 15k miles on my motor with the new clutch. Its because of my situation that I am leaning towards the defective crank theory...

[defiancy]

Just build a 6-bolt? You can pick up a block for like 200 bucks.

[blk_srt]

ok brain I got the specs for you. The 6 bolt crank main journal measures 2.44" and the 7 bolt spec is 2.441" so they seem interchangable to me

[Talon69]

This THREAD should be CLOSED!!!! its getting in the bullshit with crankwalk to much. Like the other 50 threads on this lol It did not start out for crankwalk but it just will not die PLZ close

[NateS]

We are concerned about cw because that is the only thing holding us back from building our 7 bolts.

Okay so, the other day I pulled out the big ass packet of garage bills and such the person gave me when I bought the car. My car has 145K miles on it now. However, in the reciept for the "rebuild" it says the previous motor was actually swapped for a new one. The diagnosis says the motor just died and would not turn over(maybe... cw). This all happened around 101k miles. So, I am wondering if the person before me was smart enough to go with a 6 bolt or not. I have read that you can tell the difference between a 7 bolt and 6 bolt by checking the shape of the oil pan( http://www.vfaq.com/mods/early-late-engine.html ). I do not think the oil pans are interchangable so I will be doing this asap.

Oh and the interchangable crank idea sounds very interesting.

[Blackcrow64]

Originally Posted by Talon69

This THREAD should be CLOSED!!!! its getting in the bullshit with crankwalk to much. Like the other 50 threads on this lol It did not start out for crankwalk but it just will not die PLZ close

Why do you want this thread closed now? We are trying to get all the important technical aspects of crankwalk together so we can determine a possible solution to it... Shouldn't you also be wondering the same since your building your 7 bolt as well?

Look how close we are getting, pr_ricer has given us very specific info on the cranks main journal. We now know that the 6 bolt and 7 bolt cranks are possibly interchangeable... This may be the greatest thing everyone has overlooked. Perhaps all the 6 bolt swaps could have been avoided if its as simple as swapping out the cranks and bearings from that of a 6 bolt. It sure would make things a lot simpler with building a 2g.

[blk_srt]

If you want I could get all of the block specs tomorrow and see how they match up to

[steviek]

How do you know when your car is crankwalking. I mean what are the symptoms when your driving. Is it hard to find second gear when making a left turn, cause thats what I used to have and assumed it was crankwalking. When i got my engine rebuilt it fixed whatever problem that was except that now I fear it returning??

[blk_srt]

check the crankshaft end play

[Blackcrow64]

Originally Posted by pr_ricer

If you want I could get all of the block specs tomorrow and see how they match up to

That would be excellent.

One way or another, we will be the ones to solve this problem once and for all... Then I'll rock out with my monster 7 bolt.

[95_GSX]

I say more power to you guys, if you can figure out a good solid solution to the 7-bolt problem.

I personally will be rocking my 6-bolt. Hopefully I can make it to the track this summer so I can finally be dissapointed in how slow my car is going to run a 5000+ ft of elevation.

[ez1286]

I don't think the cranks are interchangeable. Have you seen a comparison between the crank caps? Much much different. As i said before i don't think there is a way without a lot of testing to find a proven fix.