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  #21  
Old 06-05-2014, 09:28 AM
G-E G-E is offline
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Originally Posted by Rovch View Post
Okay, okay, let me explain in more detail. The motor was rebuilt 500 miles ago. New piston rings, honed cylinder walls, new bearings, resurfaced head, new valve stem seals, and probably few more things I am forgetting. It has not gone through a single oil change since the rebuild. I was planning on changing the oil at a 1000 mile mark.
All I see if that they used a little degreaser and a brush on the outside to clean it... as mentioned, you are not going to get soot and oil crusties like that fast, even from running rich with a stuck open egr, that took time to deposit

If that's a "rebuilt" head, I would assume they didn't do half of what they said, maybe changes a few bad parts after checking, they probably "resurfaced" the head with a scrub pad
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  #22  
Old 06-05-2014, 10:43 AM
Rovch Rovch is offline
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Bad gas shouldn't/wouldn't do that. sounds like you had a bad bearing or something stuck in an oil galley somewhere and that cam started locking up due to lack of lubrication.
If gas isn't an issue, what could have cause that much build up so quickly?
Can faulty PCV cause something like this within 500 miles?

I understand that build up does not relate to the cam snapping, but I still have to fix it.

Initially (when CAM snapped), I've removed both CAMs & upper chain, then cranked the engine to make sure CAM was getting oil - which it did. Cam was also very clean on the inside. Although lack of lubrication sounds like a possible cause, I did not find any evidence.

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Originally Posted by G-E
All I see if that they used a little degreaser and a brush on the outside to clean it... as mentioned, you are not going to get soot and oil crusties like that fast, even from running rich with a stuck open egr, that took time to deposit

If that's a "rebuilt" head, I would assume they didn't do half of what they said, maybe changes a few bad parts after checking, they probably "resurfaced" the head with a scrub pad
Well all that nasty build up has happened within 500 miles. Chambers on the intake side of the head and IM did not have any major buildup when I've installed it. What you see is literally 500 miles down the road.

Better pictures (first - 4 intake chambers; second - top end & exhaust side):


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  #23  
Old 06-06-2014, 11:27 AM
Def Def is offline
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I don't possibly see how that's just in 500 miles. Looks like thousands and thousands of miles of build up.

I'd change your PCV and check your intake piping for tons of oil.
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  #24  
Old 06-09-2014, 10:33 AM
Rovch Rovch is offline
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I don't possibly see how that's just in 500 miles. Looks like thousands and thousands of miles of build up.

I'd change your PCV and check your intake piping for tons of oil.
Neither can I, but it's there. And it feels nothing like your normal buildup on high mileage engines. This stuff is hard and shiny like candy (no pun intended). It does not want to come off very easily.
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Old 06-09-2014, 12:59 PM
Matt93SE Matt93SE is offline
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I almost wonder about bad fuel in that case... someone sugar'd your gas tank?
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  #26  
Old 06-09-2014, 01:15 PM
Tower240sx Tower240sx is offline
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WTF? didiyou mistakenly put epoxy or lacquer in the gas tank....nothing else should build up that hard and fast ive never seen even a 130,000 mile motor look that bad
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  #27  
Old 06-09-2014, 01:28 PM
Rovch Rovch is offline
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I almost wonder about bad fuel in that case... someone sugar'd your gas tank?
I hope not.

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WTF? didiyou mistakenly put epoxy or lacquer in the gas tank....nothing else should build up that hard and fast ive never seen even a 130,000 mile motor look that bad
I got the car in non running condition. Unless previous owner did something stupid, there should be nothing but gas.

Machine shop told me that apparently ethanol in gas can do that after sitting for a while (when I dropped the head off). Apparently I am not the first one.

Is there an acid that would be safe to use on the intake manifold to clean it on the inside (to submerge it in)? I really don't feel like scrubbing the insides with a brush and carb cleaner. This stuff is pretty tough to get off.

Not sure what to do about my fuel system either..
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  #28  
Old 06-09-2014, 01:54 PM
Matt93SE Matt93SE is offline
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Do you have the head off yet? (do you plan to take it off?)
Take it to machine shop and have them hot tank it. problem solved.

If the car was in non-running condition, there's no telling what was in the gas tank. it could be 5 yr old gas, it could be dead ants, diesel, who knows.
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  #29  
Old 06-10-2014, 02:16 PM
Rovch Rovch is offline
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Originally Posted by Matt93SE View Post
Do you have the head off yet? (do you plan to take it off?)
Take it to machine shop and have them hot tank it. problem solved.

If the car was in non-running condition, there's no telling what was in the gas tank. it could be 5 yr old gas, it could be dead ants, diesel, who knows.
Yes, the head is already at the machine shop since Thursday. Waiting on the call back after hot tank and pressure check.

I was asking about the intake manifold... Not the head. IM has just as much nasty built up on the inside around injector/PCV area and I'd rather let it dissolve in some acid instead of scrubbing it with a brush. Maybe I'll take it down to the machine shop to see if they'll hot tank it as well.
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  #30  
Old 06-10-2014, 02:37 PM
Matt93SE Matt93SE is offline
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Yeah definitely. Its just a hunk of aluminum. They can tank it just like the head. Just pull all the sensors off first. Might as well gut the emissions crap if you haven't already.
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