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Re: Wear Rocker arm
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Hi!

Pics before i mount the engine on the car.

I will take of the cylinder head of, and see if the oil hole is in same alignemt with cylinder block and see if the engine head has an obstruction.

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jpg  885044_1146649955352731_3757331953200138939_o.jpg (143.52 KB)
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jpg  12742709_1146649698686090_5452160000010645519_n.jpg (30.61 KB)
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Posted on: 9/12 17:51
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Re: Wear Rocker arm
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The cylinder head oil hole is never in alignment with the block -- it is offset. A passage needs to be created to flow oil to the head and thus to the rocker shaft

What is the result of your test? Does the oil flow already?

Posted on: 9/13 5:26
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Re: Wear Rocker arm
No life (a.k.a. DattoMaster)
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Regarding the rocker tip damage,
I had this happen to me and was told it was due to valve float.
What do the valve stem tips look like? Are they damaged also?
Have you confirmed the valve springs are not stacking solid at full lift?

Regarding the scoring on the ID of the rocker arm,
The last time I assembled my cylinder head rocker arm assembly, I noticed that I torqued the rocker tower bolt too tight and the rocker became too difficult to move by hand. Basically, I was crushing the rocker shaft and it was not round. Luckily, I loosened the bolt and retorqued and all was well again.

Posted on: 9/13 5:56
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Re: Wear Rocker arm
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Thanks for your replies.

I have no oportunity to make the test on oil flow because i took of the engine of, when i have the oportunity i will assembly a starter and test the oil passage. Now im geting ideias and knowldeges from you with experience and trouble solutions.

The valve stem its ok no damgages, i notice the valve springs are stacking solid at full lift, the engine is very stuck it is dificult to move it with a wrench on cranckshaft pulley, but when i removed the rocker arns, the engine moves slowly with no prison.

Thanks Again

Luis

Posted on: 9/13 9:14

Edited by Luigi on 2017/9/13 11:19:23
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Re: Wear Rocker arm
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These are the itens i used, and i kept the standard spring lock retainer

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jpg  s-l1600 (1).jpg (100.39 KB)
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jpg  s-l1600 (2).jpg (87.35 KB)
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jpg  DATSUN-1200-GX-Double-Valve-Spring-Kit-For-_1.jpg (33.87 KB)
6267_59b956e99f97e.jpg 400X300 px

Posted on: 9/13 17:01
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Re: Wear Rocker arm
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I hope not assembly the springs in wrong way?????

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jpg  12239650_1091594050858322_8962407542724246586_n.jpg (40.06 KB)
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jpg  12243138_1091594477524946_1128557082924015744_n.jpg (54.35 KB)
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Posted on: 9/13 17:10
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Re: Wear Rocker arm
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Hi!

Only on November i will make the oil head test im far from car....

I read on springs specifications:

"This item is worthy of middle class specifications enough.(To about 8,000 rpm spec)
They are Valve Springs popular very much in JDM.
The double valve springs control Valve Surging at the time of high rpms.
It supports; cam lift - 6.5mm, valve lift - 9.4mm"


And the cam lift is 0.298" or 7,57mm that is i saw on paper..


Cam lift 7.57mm is biger than the spring can suport?????

Please let me know

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jpg  IMG_0383 (1).JPG (116.17 KB)
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Posted on: 9/18 21:35
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Re: Wear Rocker arm
No life (a.k.a. DattoMaster)
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First off; the GX valve springs will not support the cam you have. The cam you have is near 11mm valve lift.

I'm running similar cam lift and when I assembled the motor I checked the GX springs for bind and couldn't even get a feeler gauge in between the coils to measure them, clearly they were binding. Check Iskederian's website, I used their springs.

As for checking the oil passages; you can use an oil can to pump oil through the head to check the passages.

Tom

Posted on: 9/19 1:05
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Re: Wear Rocker arm
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Hi!

Im in trouble!!!!
GX valve springs will not support the cam i have. The cam i have is near 11mm valve lift

sTANDARD a14 Springs will fit? I need help!!!

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jpg  7518.jpg (39.11 KB)
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Posted on: 9/19 14:24

Edited by Luigi on 2017/9/19 14:45:48
Edited by Luigi on 2017/9/19 15:49:29
Edited by Luigi on 2017/9/19 17:54:02
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Re: Wear Rocker arm
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I have contact the Iskenderian, and they inform me to verify the coil biding, perhaps it is the problem to cause the wear on the rocker arms, and in other hand acording with Dave and Tom i will verify the oil circuit on cylinder head.

Im afraid the coil biding makes serious problems on camshaft.

Aparently i cant see any wear its smooth on lobes no scratches. I dont know if gains some wear..... f.......

one lobe appears lack of material.

Thanks


Luis

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jpg  IMG_0390.JPG (107.47 KB)
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Posted on: 9/19 17:10

Edited by Luigi on 2017/9/19 21:21:14
Edited by Luigi on 2017/9/19 21:24:00
Edited by Luigi on 2017/9/19 21:28:30
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