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NikwoaC's "Commitment Issues" Engine Build

  • Thread starter Thread starter NIKwoaC
  • Start date Start date Mar 12, 2011
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NIKwoaC

中國製造
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#621
  • Apr 6, 2017
  • #621
5.0Droptop said:



Hi Nik with out a C
Click to expand...

 
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Noobz347

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#622
  • Apr 6, 2017
  • #622
Use this:





Get this:



 

FastDriver

I was uncomfortably high & wearing a helmet
SN Certified Technician
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#623
  • Apr 6, 2017
  • #623
It really does seem like it was over tightened.
 

NIKwoaC

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#624
  • Apr 7, 2017
  • #624
Ha, you guys are talking to the guy who uses his torque wrench to build IKEA furniture.

You can't see it in these pictures, but the only places where the gasket was compromised was around the water ports at each end of each cylinder head. The rest of the gasket around all the intake ports looks perfect.

It almost looks like the pressure in the cooling system was slowly pushing the gasket out, and maybe the vacuum in the intake port was helping it along. The gasket material looked like it was deteriorating.

Probably not coincidentally, those 4 outer bolts had rusted pretty badly. If anything I may have lost some clamp load and that allowed the gasket to squirm.
 
Reactions: RaggedGT

CarMichael Angelo

my rearend will smell so minty fresh,
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#625
  • Apr 7, 2017
  • #625
NIKwoaC said:
Ha, you guys are talking to the guy who uses his torque wrench to build IKEA furniture.

You can't see it in these pictures, but the only places where the gasket was compromised was around the water ports at each end of each cylinder head. The rest of the gasket around all the intake ports looks perfect.

It almost looks like the pressure in the cooling system was slowly pushing the gasket out, and maybe the vacuum in the intake port was helping it along. The gasket material looked like it was deteriorating.

Probably not coincidentally, those 4 outer bolts had rusted pretty badly. If anything I may have lost some clamp load and that allowed the gasket to squirm.
Click to expand...

I think you need to have the intake manifold mating surface checked for its deck smoothness/warpage. While I'm not completely sure, I was thinking that the 4 outer ends of the manifold can pull tighter than the middle does. A 20ft lb pull on the outside corners equates to more squish than in the middle.

Just a thought.
 

NIKwoaC

中國製造
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#626
  • Apr 7, 2017
  • #626
90lxcoupe said:
I havent used any of that stuff so i really have no opinion on it. $30 for each gasket is a little steep but Ed's gotta eat too. Since you are the type of guy who would probably be into this, ill tell you what i did...

I didnt want to buy an off the shelf gasket for my highports and deal with cutting a gasket up every time i have the intake manifold off, dealing with oversized water ports etc... So after telling my engine builder, he suggested calling cometic and seeing what a custom set would run me. So i called cometic up, and they gave me a rough estimate price wise, which seemed more than reasonable for a gasket that was 100% custom for me. I made a paper template, sent it off to them and within a couple weeks they called me to ask what material and thickness i wanted. I want to say the gaskets were like 12 or 15 bucks each, and they fit perfect. I would suggest if you go this route to oval out the holes for where the intake bolts are.

I also made an exhaust template after seeing how good the intake ones came out.
Click to expand...

I have heard of cometic's custom gasket service, it sounds like an awesome option...
 

NIKwoaC

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#627
  • Apr 7, 2017
  • #627
madmike1157 said:
I think you need to have the intake manifold mating surface checked for its deck smoothness/warpage. While I'm not completely sure, I was thinking that the 4 outer ends of the manifold can pull tighter than the middle does. A 20ft lb pull on the outside corners equates to more squish than in the middle.

Just a thought.
Click to expand...

That's a good call. I can probably do it in the lab at work actually.
 

5.0Droptop

...all those nights we shared, and you're a dude??
Special Agent Mukity-Muck Whats in Charge Round Here
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#628
  • Apr 7, 2017
  • #628
If heads have been decked much that can throw off the geometry of the head to intake mating faces. So ive been told. Ive never saw it happen.
 

Chuckman

GTFO you fat, heavy bastard
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#629
  • Apr 7, 2017
  • #629
the state of your current gaskets is fairly common with all the older felpro gaskets (1250, 1262, 1262r etc). remember that they were designed for racing applications 40+ years ago with iron heads (iron distorts way less when hot compared to aluminum).

the 1250 and 1262 have been updated to the -s3 version, which is a steel cored, fiber gasket with printed rubber. much better on the durability, but the 1262r has been neglected.

the oem-replacement felpros are a steel core rubber (or silicon). these are the best for durability but are sized for the small iron e7 heads (though i used them on my old gt40p setup, just barely big enough for that).

fwiw, except for a quick mist of spray on low-tack gasket adhesive if they're being stubborn on alignment, i install these things dry and havent had an issue. you want your mating surfaces as clean, smooth, and dry as you can get. rtv of your choice on china walls, and use studs in the corners to guide the intake on. torque to 25 following the sequence twice, wait a half hour or more, and do the pattern again, and let dry for overnight or two before filling fluids.
 
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5.0Droptop

...all those nights we shared, and you're a dude??
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#630
  • Apr 7, 2017
  • #630
madmike1157 said:
I think you need to have the intake manifold mating surface checked for its deck smoothness/warpage. While I'm not completely sure, I was thinking that the 4 outer ends of the manifold can pull tighter than the middle does. A 20ft lb pull on the outside corners equates to more squish than in the middle.

Just a thought.
Click to expand...

that is why there is a torque sequence.
 

NIKwoaC

中國製造
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Apr 7, 2017
#631
  • Apr 7, 2017
  • #631
@90lxcoupe

Alright, after reading horror story after horror story on the internets about Fel-Pro 1262-style gaskets failing, I convinced myself to call up Cometic and inquire about a custom set. All you have to do is ask them for a 1262R substitute and they know exactly what you're talking about- they already have the pattern. I went with the aramid fiber (kevlar) @ .094 thickness, for no other reason than it's close to the .090" thickness of the 1262R and that seemed to work for me.

He quoted me $13something over the phone, each. Incredibly reasonable pricing.

Their lead time is 4 days, which again, seems very reasonable for a custom gasket, but it does mean the car is going to have to sit a while longer... Oh well.
 
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Noobz347

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#632
  • Apr 7, 2017
  • #632
NIKwoaC said:
Ha, you guys are talking to the guy who uses his torque wrench to build IKEA furniture.

You can't see it in these pictures, but the only places where the gasket was compromised was around the water ports at each end of each cylinder head. The rest of the gasket around all the intake ports looks perfect.

It almost looks like the pressure in the cooling system was slowly pushing the gasket out, and maybe the vacuum in the intake port was helping it along. The gasket material looked like it was deteriorating.

Probably not coincidentally, those 4 outer bolts had rusted pretty badly. If anything I may have lost some clamp load and that allowed the gasket to squirm.
Click to expand...

Ah but if you coated the threads for the water-jacket bolts, it will change your torque value. Some of that stuff is pretty "slickery".
 

Noobz347

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#633
  • Apr 7, 2017
  • #633
Yep and torque wrenches can double as breaker bars.
 
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NIKwoaC

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#634
  • Apr 9, 2017
  • #634
FastDriver said:
Yep. I vote Nik's fault
Click to expand...

You guys sound like my wife.
 
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NIKwoaC

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Jun 26, 2017
#635
  • Jun 26, 2017
  • #635
Some reassembly pics, because why not? This actually took place weeks ago, I've been driving the car.

Super thin coat of black RTV around the water ports for good measure.







Yea I know, that oil fill neck is ugly. The valve covers used to be rattle can black, I've stripped them and this winter they are going to be refinished and powdercoated. In the mean time they're just bare and ugly.



Fast forward to fully assembled. Sorry, I know my engine bay isn't as pretty as some of the cars around here... Maybe someday. I actually did do a little bit of degreasing, bracket painting, and a little more wire tucking before this shot, but in general it has a long way to go IMO.

 
Last edited: Jun 26, 2017
Reactions: stangboy, A5literMan, Nutty 5.o and 2 others

NIKwoaC

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Jun 26, 2017
#636
  • Jun 26, 2017
  • #636
At a cruise-in last weekend.





I was one of the last people to leave, haha. Some of these old guys must not like to have their cars out after dark.

 
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GroverDill

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#637
  • Jun 26, 2017
  • #637
You know the minute I saw my T top 85 your car popped into my mind and $3700 jumped right out of my pocket.

Love that car.
 
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NIKwoaC

中國製造
15 Year Member
Oct 31, 2006
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Jun 26, 2017
#638
  • Jun 26, 2017
  • #638
GroverDill said:
You know the minute I saw my T top 85 your car popped into my mind and $3700 jumped right out of my pocket.

Love that car.
Click to expand...

Ha, thanks man. I've had this car for 15 years now. It's went from a clean, stock, low mile garage queen, to a ragged college kid's hillbilly hot rod, to... Where it is now. It's not perfect, but I enjoy it.

Foxes are definitely getting more rare, and you hardly ever even see 4-eye cars anymore, but oddly enough a primer black '85 t-top slowly cruised by right after I parked my car at the cruise-in. He didn't stop so I wasn't able to talk to him about it.
 

General karthief

wonder how much it would cost to ship you a pair
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#639
  • Jun 26, 2017
  • #639
I still gots the city boy version of the 'hillbilly hot rod'
 

Mustang5L5

That is…until I whipped out my Bissell
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#640
  • Jun 26, 2017
  • #640
NIKwoaC said:
Foxes are definitely getting more rare, and you hardly ever even see 4-eye cars anymore,
Click to expand...

Up here in the northeast, they've all rusted out long ago and all you're left with are pieced together, badly modified, 9-owner, rot-boxes that guys still ask $5K for. Rust is so bad, even the Sn95 cars are starting to show the typical strut tower rot issues. All that's left are garage queens that come out on nice nights or Sunday AM's from June to Sept, and then go back into hiding.

I haven't seen a clean 4-eye on the streets in years in this area....
 
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