Need crank

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Lynx's picture
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London Ontario

Dec 23, 2009
Need crank

As title.  Perfect crank.

 

 

dmgtir's picture
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Calgary,AB

May 9, 2012

pm'd

1990 Nissan Pulsar GTi-R

1991 Nissan Pulsar GTi-R

Lynx's picture
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London Ontario

Dec 23, 2009

Found a block.  Now need a crank

Lynx's picture
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London Ontario

Dec 23, 2009

anyone?  I want to get this build rolling and this is the final peice of the puzzel.  I have two cracked cranks right now.

Lynx's picture
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London Ontario

Dec 23, 2009

Now own three cracked GTiR cranks....Someone send me a good one dammit!!!!

 

Bump

nissannx's picture
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Frank Ewald
BC

Oct 23, 2010

What!

tech44's picture
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BC

Mar 22, 2010

Can you post pictures, please? I want to see this; not that I don't believe you, just want to know what to look out for.

Lynx's picture
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London Ontario

Dec 23, 2009

Yeah I'll get some pics up.  I junked two of the cranks already.  but they all cracked the same way and in nearly the same spots.

s3by's picture
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GATINEAU , near Ottawa

Mar 16, 2008

is it really a cracke or a mark made when they did the crank ....

post pictures please i'm really curius about this . !!

 

kdetlor's picture
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Kitchener, ON

Apr 21, 2010

Might be worth a mag-flux leak test if you can get it done free or cheap.

Are stock cranks forged?

You could also grind the area to see if it is a machining mark, since you will likely have it balanced anyway.

If it is a machining mark we should see a couple for sale soon! lol

GTi-R, the best ugliest car I've EVER seen/driven. You can make it cool, you can make it fast but you CAN'T make it look pretty.

Lynx's picture
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London Ontario

Dec 23, 2009

I doubt that anyone would recommend me grinding the crank journal surface unless they wanted me to completely destroy the crank.

Lynx's picture
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London Ontario

Dec 23, 2009

here is a pic.

 

All three cranks were cracked here.  This one was the least detectable, and one was even cracked on both sides of 2 rod journals and both sides of one main journal.

s3by's picture
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GATINEAU , near Ottawa

Mar 16, 2008

WOW ...

well if you had 3 like these, you would have been able to make yourself a nice table ..

i know what to look at , when i'll overhaul my engine ( if it hapen)

 

tech44's picture
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BC

Mar 22, 2010

New crankshafts still price out at work.  Not cheap though.

Lynx's picture
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London Ontario

Dec 23, 2009

how much?  can you get me the employee discount?

kdetlor's picture
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Kitchener, ON

Apr 21, 2010

You can still have it fixed but you'd have to weigh the costs against a new one.  Maybe you can get a volume discount now! lol.. sry .

Fixing the crank at the journal requires it to be first ground, then metal spray weld, then machining, heat T....blahblah, etc.

You're doing a complete engine build so maybe this is something you should consider...fully prep'd crank, knife edge, balanced, align-hone, etc...

 

ps; they are forged. 

 

 

 

GTi-R, the best ugliest car I've EVER seen/driven. You can make it cool, you can make it fast but you CAN'T make it look pretty.

Lynx's picture
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London Ontario

Dec 23, 2009

Not cheaper to fix than buy a new one.  I doubt highly there is anyone in London that can do it either which means shipping and delays.  Plus then you have a repaired crank.  I'd rather buy a billet one for 1300ish and be done with it.  Comes balanced knife edged and brand new.

 

But I'm not goig that extreme on the build.  Sticking factory bottom end so there is no reason to get a crazy crank.  I'd run the DET one but I spent the money on gtir bearings and getting gtir rods prepped and arp bolts installed.  So I might as well have the crank surface to use the bearings.

 

Tech44 I'm serious about the new crank, what are you showing for a price?

Lynx's picture
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London Ontario

Dec 23, 2009

NVM got one from my dealer. 1185, unknown shipping time.  From Japan, none in NA.

tech44's picture
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BC

Mar 22, 2010

This is what I found; 12200-54C05, crankshaft assembly. Retails at 1185.07 plus 12% HST. You could take that number to any local Nissan Dealer and see what they can do for you. Covers 08 month of 1990 to end of production.

Lynx's picture
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London Ontario

Dec 23, 2009

1327....so better to buy a billet crankshaft.

Lynx's picture
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London Ontario

Dec 23, 2009

anyone know of any ontario companies that specialize in welding cranks?

kdetlor's picture
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Kitchener, ON

Apr 21, 2010

From superstreetonline.
Crank That SR Boy

I’m mid-way through my project 240SX and ran into a problem. I decided to go SR20DET instead of KA-T because I found what I thought to be a good deal on an SR. I tore it down and found that my crank was pretty much done,a main bearing failure that somehow caused a crack on the 5th main journal. So much for a “built” SR. But my question is: will a crankshaft from a FWD SR work in a RWD SR? Sean Callahan Newark Valley, NY

A That is a good question. Since we have never encountered this before we asked a few SR20 gurus that we knew. When we have a SR20 issue we can’t solve, we ask Gary Narusawa (OMG) from Project Car Mag and Marcos Vargas from SR20Store, and this is what they said. The FWD and RWD SR20s are very similar in design and construction with minor differences. With the exception of the Pulsar GTi-R crank, you can use any of the FWD SR20 cranks, even the USDM NA one. Of course, when you do something like this, make sure your engine builder checks everything to be sure that it is compatible and will work with your “hybrid” build. If you need a good reliable source for parts and helpful information, contact Marcos Vargas at the SR20Store (sr20store.com); he is the ultimate SR20 guru.

GTi-R, the best ugliest car I've EVER seen/driven. You can make it cool, you can make it fast but you CAN'T make it look pretty.

kdetlor's picture
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Kitchener, ON

Apr 21, 2010

Also, could you use a non-gtir crank and bearing? Just a thought.

GTi-R, the best ugliest car I've EVER seen/driven. You can make it cool, you can make it fast but you CAN'T make it look pretty.

Lynx's picture
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London Ontario

Dec 23, 2009

Yes, but then the bearing would not centre properly in the rod.  This is fixable by either getting a new bearing locater cut into the rod, ir by using non GTiR rods.

 

If I'm going to have to go to that trouble I'd rather spend the time and track down a real gtir crank and utelize the 2mm wider bearings.  There is a reason they upgraded.

Lynx's picture
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London Ontario

Dec 23, 2009

I'm still looking for a good crank.  I ended up with 5 crankshafts.  3 were cracked down the 0/180 line on at least one rod journal and the other two are not cracked but require grinding oversized.....I'd rather not if I can avoid it.

nissannx's picture
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Frank Ewald
BC

Oct 23, 2010

I wonder how many of us are running with cracked cranks - based upon your experience.

 

Lynx's picture
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London Ontario

Dec 23, 2009

From reading things on the internets which is always correct....apparently they all tend to crack along the forged line over time and stress.  Probably happens to most of them and really isn't a problem until the crack widens enough to grab onto a bearing.  The one that I had was cracked along 3 journals 2 rods and a main...that would be bad news.  Never seen a snapped SR crank though.  The rods are narrow giving the crank more room to be beefy.

 

Happens less to DE/DET cranks probably due to the better radius on the rod journal.  There is less room for stress relief on the GTIR crank due to the wider bearings.

tech44's picture
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BC

Mar 22, 2010

Did you price out at your local dealer and see if they can get you a better price?
 

Lynx's picture
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London Ontario

Dec 23, 2009

same price exactly as I already quoted.1185 plus tax.

 

Getting one crank ground undersized on the mains, found a new mint one and have another that has some light scoring that I will just polish out.  So total out of 6 cranks 3 were cracked across the journal on the forging line.

If anyone wants a fluxed and polished crank that had some light scoring, good for a factory replacement build, pm me.  It's going into cold storage along with the minty fresh one.