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Main : Mechanical : Engine Bakkie A15 Crank 2

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Bakkie A15 Crank 2
Bakkie A15 Crank 2Popular
SubmitterCliveMore Photos from Clive   Last Update2009/7/18 1:24    Tell a friendTell a friend
Hits2378  Comments15    0.00 (0 votes)0.00 (0 votes)
...eish.

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The comments are owned by the poster. We aren't responsible for their content.

Poster Thread
b310gx
Posted: 2009/7/26 2:58  Updated: 2009/7/26 2:58
No life (a.k.a. DattoMaster)
Joined: 2002/7/19
From: sydney australia
Posts: 1858
 Re: Bakkie A15 Crank 2
A15 cranks that have had a hard life crack around the rear journals. I bought an engine from a racer in Melbourne years ago & the crank was cracked in all 4 journals. Nitriding stops this from happening, though I've only done it for race engines. Maybe it was abused in a previous life. Daily driving shouldn't stress the crank to this point, but forced induction can, especially if it runs lean & detonates. It's due to the stroke length, the mains & the big end journals are offset enough to be not as tough as the A12 & A14 cranks. The nitriding adds strength to the surface, but it does bend the cranks. The cranks can be straitened easily, Graham Wilkins Performance has done it for me the 3 timesI've had it done. Some friends of mine think it's a waste of money, but I reckon its cheaper to nitride & straighten than finding a new crank.

Poster Thread
revhead001
Posted: 2009/7/25 7:11  Updated: 2009/7/25 7:11
No life (a.k.a. DattoMaster)
Joined: 2008/3/15
From: Melbourne
Posts: 2742
 Re: Bakkie A15 Crank 2
I have seen this happen on a few different engines. It usually happens when a crank is dropped and then refitted to an engine. Once i broke the crank on a 351 Cleveland that came from HM engines. I fitted a balancer and the boss decided to change it. So I pulled it off again with a rattle gun and the crank snapped behind the timing gears!! Classic.

Poster Thread
Clive
Posted: 2009/7/25 7:19  Updated: 2009/7/25 7:19
Home away from home
Joined: 2005/2/21
From: South-Africa,Pretoria
Posts: 240
 Re: Bakkie A15 Crank 2
So it was abused prior to me having it? dont want this to happen again. hehe

Poster Thread
2QK4U
Posted: 2009/7/18 12:25  Updated: 2009/7/18 12:25
Home away from home
Joined: 2005/4/19
From: Gold Coast, Australia
Posts: 744
 Re: Bakkie A15 Crank 2
iv hurd all nissan/datsun cranks are steel forged? but only heard that dont know if its accurate.

Poster Thread
Clive
Posted: 2009/7/18 15:04  Updated: 2009/7/18 15:04
Home away from home
Joined: 2005/2/21
From: South-Africa,Pretoria
Posts: 240
 Re: Bakkie A15 Crank 2
Well that is definately an A15 Crank from an A15 engine. As we get them in South Africa as an import engine. Got another one last week, exactly the same. Only difference is the new one a got came from a std sub assembly, so crank is still std spec and wasnt abused... So will see if i have better luck. Forged does sound beter though doesnt it ? :P

Poster Thread
ddgonzal
Posted: 2009/7/19 4:38  Updated: 2009/7/19 4:38
Moderator
Joined: 2001/5/3
From: Hawaii, USA
Posts: 31345
 Re: Bakkie A15 Crank 2
Quote:
piston 3 and 4 ... almost half n milli meter smaller then the other 2.
So the engine wasn't balanced. Nissan did a good balance job at the factory, but it sounds like someone replace two pistons with oversize.

Poster Thread
Clive
Posted: 2009/7/19 7:28  Updated: 2009/7/19 7:28
Home away from home
Joined: 2005/2/21
From: South-Africa,Pretoria
Posts: 240
 Re: Bakkie A15 Crank 2
haha na, i'l upload the pics, after the crank went they almost got made oval. Was a set of 40thou's

Poster Thread
A14force
Posted: 2009/7/22 8:19  Updated: 2009/7/22 8:19
No life (a.k.a. DattoMaster)
Joined: 2003/12/3
From: Christchurch NZ
Posts: 3704
 Re: Bakkie A15 Crank 2
Fark! I never thought I'd see a failure like that from an A series.

Poster Thread
steveo
Posted: 2009/7/22 10:43  Updated: 2009/7/22 10:43
No life (a.k.a. DattoMaster)
Joined: 2003/10/13
From: newcastle, NSW
Posts: 1691
 Re: Bakkie A15 Crank 2
Same here! i've never seen this amout of damage in any Dato engine.

You have certainly did a good job of it!!

Poster Thread
Clive
Posted: 2009/7/24 17:52  Updated: 2009/7/24 17:52
Home away from home
Joined: 2005/2/21
From: South-Africa,Pretoria
Posts: 240
 Re: Bakkie A15 Crank 2
so i gues this doesnt happen often ? i never had this problem with my A14 crank or any other A14 crank....

Poster Thread
2QK4U
Posted: 2009/7/18 7:36  Updated: 2009/7/18 7:36
Home away from home
Joined: 2005/4/19
From: Gold Coast, Australia
Posts: 744
 Re: Bakkie A15 Crank 2
vok! how did you manage that?

Poster Thread
Clive
Posted: 2009/7/18 10:01  Updated: 2009/7/18 10:01
Home away from home
Joined: 2005/2/21
From: South-Africa,Pretoria
Posts: 240
 Re: Bakkie A15 Crank 2
haha, got a hectic vibration if a back of the throttle the last month or so. And on my way back from work it finally went... piston 3 and 4, also all screwed up, almost half n milli meter smaller then the other 2. luckly i wasnt hammering it when it jammed up

Poster Thread
D
Posted: 2009/7/18 11:01  Updated: 2009/7/18 11:01
No life (a.k.a. DattoMaster)
Joined: 2002/10/28
From: on my stationary Earth @ 0 km/h
Posts: 10847
 Re: Bakkie A15 Crank 2
Is it a cast crank? first I hear the a15 are cast then some are forged :(

Poster Thread
steveo
Posted: 2009/7/18 11:11  Updated: 2009/7/18 11:11
No life (a.k.a. DattoMaster)
Joined: 2003/10/13
From: newcastle, NSW
Posts: 1691
 Re: Bakkie A15 Crank 2
WHOA!!!!!! Thats nasty.

Poster Thread
silvia-specr
Posted: 2009/7/18 7:27  Updated: 2009/7/18 7:27
Home away from home
Joined: 2008/12/14
From: Vancouver, Wa
Posts: 234
 Re: Bakkie A15 Crank 2
That looks like it would leave a mark. OUCH!!!