s14 Mayhem

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240tshead
Taylor Shead
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Location: UTA, Texas
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240tshead

Re: s14 Mayhem
April 05, 2011 12:12PM

Registered: 02/28/2011
Posts: 102

Quote
RallyxPOS13
Gene's right, the twin cam timing chain guides are magnitudes more durable than the SOHC motors. Still, 150,000-180,000 (assumed) miles of a metal chain flailing on a piece of plastic is about due for replacement, and since you'll have the head off anyway...

For wheels, it sounds like you're 5lug, so head down to the nearest pick-n-pull and grab a set of crown vic wheels, towncar wheels, or something like that. They'll be 15", RWD offset, and if they're built to keep up with the weight of those land barges, they should take a rock hit or two.

It sounds like you're planning on removing the emissions. When yanking the EGR(and AIV) out of the exhaust manifold, don't do some ghetto repair like the nickel and JB Weld stuff I see on all the forums. Just run to your nearest Nissan parts counter and grab a(two) part # 14052 - 21R00 plug(s). They are under $10 and make it seal perfectly, and are reversible.

The chain guides you are talking about are for the lower chain, right? I have around 135,000 miles but I would still like to replace them. It couldn't hurt.

Alright, yeah a lot of Ford stuff likes to match up to our cars pretty good. Thanks.

As for the EGR blocking I have a block of plate for the intake side and I'm running an aftermarket header with a plug that came with it for the exhaust side. I had too, in fact because the damn thing didn't match up. I am running rich currently, too. Will putting a resistor in before the EGR sensor make to where it wont or does that just get rid of the CEL code (which I am not worried about)? I've heard it both ways.

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heymagic
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heymagic

Re: s14 Mayhem
April 05, 2011 02:12PM

Registered: 01/25/2006
Posts: 3,740

At 100k I'd replace all the chain stuff on an engine used for racing...just because.

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240tshead
Taylor Shead
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Location: UTA, Texas
Join Date: 02/28/2011
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240tshead

Re: s14 Mayhem
April 06, 2011 10:56AM

Registered: 02/28/2011
Posts: 102

Right, it wouldn't hurt to replace 'em really. I got quotes today.

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MRWmotorsports
Martin Walter
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MRWmotorsports

Re: s14 Mayhem
April 06, 2011 03:11PM

Registered: 03/01/2006
Posts: 450

Did you pull the head and find what was causing all the noise yet?

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240tshead
Taylor Shead
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240tshead

Re: s14 Mayhem
April 07, 2011 01:34PM

Registered: 02/28/2011
Posts: 102

Yes, I pulled it and everything checks out fine. No valve damage, no marks on piston. Bad news is that it is bottom end. Time to find a cheap KA to swap in.

When turning the engine over it still makes a clanking noise so my local nissan/ka know-it-all told me that it was likely a cracked piston skirt or something.

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Aaron Luptak
Aaron Luptak
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Aaron Luptak

Re: s14 Mayhem
April 07, 2011 02:08PM

Registered: 02/15/2008
Posts: 776

Quote
240tshead
Yes, I pulled it and everything checks out fine. No valve damage, no marks on piston. Bad news is that it is bottom end. Time to find a cheap KA to swap in.

When turning the engine over it still makes a clanking noise so my local nissan/ka know-it-all told me that it was likely a cracked piston skirt or something.

wait, I thought you had a just-rebuilt-to-factory-specs shortblock lying around. Why not just throw your now-known-good head on that and go?

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240tshead
Taylor Shead
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240tshead

Re: s14 Mayhem
April 07, 2011 02:28PM

Registered: 02/28/2011
Posts: 102

That's also an option, I just have to compare the costs now, because I'm dipping into borrowed money.

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john vanlandingham
John Vanlandingham
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john vanlandingham

Re: s14 Mayhem
April 07, 2011 04:47PM

Registered: 12/20/2005
Posts: 14,152

Quote
240tshead
Yes, I pulled it and everything checks out fine. No valve damage, no marks on piston. Bad news is that it is bottom end. Time to find a cheap KA to swap in.

When turning the engine over it still makes a clanking noise so my local nissan/ka know-it-all told me that it was likely a cracked piston skirt or something.

Well get it out and stripped
Pistons have---allegedly a dish .260" deep x 3.00" dia.

Sounds like an opportunity to go flat tops and bump the comp up a bunch.
I know a piston that is flat top and 90.5mm, forged and a set of 4 is $220.
Bush the rod for 22mm and away you go....maybe some valve reliefs...

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240tshead
Taylor Shead
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240tshead

Re: s14 Mayhem
April 07, 2011 05:24PM

Registered: 02/28/2011
Posts: 102

That's the plan once my job gets going haha. For now I need a running vehicle (quickly) but when the motor comes out, it's getting torn down and built. I was thinking Wiseco 11.1:1 cr pistons, but which ones are the ones you stated?

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john vanlandingham
John Vanlandingham
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john vanlandingham

Re: s14 Mayhem
April 07, 2011 05:45PM

Registered: 12/20/2005
Posts: 14,152

Quote
240tshead
That's the plan once my job gets going haha. For now I need a running vehicle (quickly) but when the motor comes out, it's getting torn down and built. I was thinking Wiseco 11.1:1 cr pistons, but which ones are the ones you stated?

CIMA-Mahle. Known good.
Wisco would cost about twice. maybe not with the cost of some valve reliefs.

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240tshead
Taylor Shead
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240tshead

Re: s14 Mayhem
April 07, 2011 06:58PM

Registered: 02/28/2011
Posts: 102

Alright, I'll look into those also. I'll get up pics and a video of the noise when I can find my camera.

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heymagic
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heymagic

Re: s14 Mayhem
April 07, 2011 09:18PM

Registered: 01/25/2006
Posts: 3,740

Make sure you don't have something stupid like loose flywheel bolts.....or a starter drive hitting the ring gear.

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240tshead
Taylor Shead
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240tshead

Re: s14 Mayhem
April 07, 2011 09:32PM

Registered: 02/28/2011
Posts: 102

Oh I'm positive that it's coming from cylinder 1. The sound is explicitly coming from that area and it does it whenever the piston rotates past BDC.

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240tshead
Taylor Shead
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Location: UTA, Texas
Join Date: 02/28/2011
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Posts: 102

Rally Car:
scrap heap

240tshead

Re: s14 Mayhem
April 08, 2011 08:11AM

Registered: 02/28/2011
Posts: 102

...possibly found a FREE supposedly 98k miles KA24DE from a friend and all it needs is a timing chain. And I just bought a brand new OEM one. Score. Now to see if it really runs....

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john vanlandingham
John Vanlandingham
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john vanlandingham

Re: s14 Mayhem
April 08, 2011 11:33AM

Registered: 12/20/2005
Posts: 14,152

Quote
240tshead
...possibly found a FREE supposedly 98k miles KA24DE from a friend and all it needs is a timing chain. And I just bought a brand new OEM one. Score. Now to see if it really runs....

For the price of a pan gasket......................................
My memory-----slightly faded, but maybe not as faded as some----says that's a steel crank in there.
Steel is Strong---Mongo likes steel
But it doesn't hold oil the same way iron does.
I've been in the bottom of plenty of Saab 99/900 motors with 100-125k on them and seen first hints of copper on the upper rod bearings and lower main bearing shells.

For the price of a pan gasket-------

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