My old intake.

[1dollardog]

I cleaned up my extra intake that I had talked about porting in another thread earlier. I took it to work and used our parts washer. Cleaned up pretty well minus the nooks and cranneys. I noticed in the first coolent port (front driver's side I think) that one edge of the port wasn't smooth or even rectangular like all the rest. I actually dug what looked like caked in old dirt (mabe stop leak). One edge of that port is jagged. It is supposed to be smooth right? What would have caused this? It isn't eroded into another port or the bolt hole or anything. As far as I know the engine that it came off of didn't have any leaking or antifreeze in the oil or anything. Do you think this is a problem or is the intake trash now? I don't have my digi cam with me or I would take some pics and post them. On another note it lookes like the intake has a little divit eroded out on the other corner on a flat section. Is this common. A good pic of the port side of a good intake would be helpfull.
Thanks,Steve

 

[turbonut85]

Is this the spot you are looking for?

 

[tb3]

you could always have it welded on and cleaned up, but chances are its fine. the coolant/egr ports on these things aren't always that pretty from the factory from what i've noticed

 

[1dollardog]

Is this the spot you are looking for?

Yeah mine is honed out a good 1/2" or more toward the inside bolt hole. JB Weld time maybe:biggrin: . I don't know a good welder.

 

[Jerryl]

Yeah mine is honed out a good 1/2" or more toward the inside bolt hole. JB Weld time maybe:biggrin: . I don't know a good welder.

JB weld holds fine. XXXX miles and up to 28PSI boost :wink:
Surface prep is key though.
Also, there are different types of JB liquid weld. I would not use the "fast curing" kind.
Just study the tensile strength and temp specs.
J-B Weld Company - Products Overview

Welding cast Aluminum is tricky and you expose the sealing surfaces to warpage.
Talked a quite a few weld engineers back in the day, and everyone agreed; It will warp.

 

[1dollardog]

JB weld holds fine. XXXX miles and up to 28PSI boost :wink:
Surface prep is key though.
Also, there are different types of JB liquid weld. I would not use the "fast curing" kind.
Just study the tensile strength and temp specs.
J-B Weld Company - Products Overview

Welding cast Aluminum is tricky and you expose the sealing surfaces to warpage.
Talked a quite a few weld engineers back in the day, and everyone agreed; It will warp.

Thanks for the link. What causes this by the way? Bad casting? Seems like if the intake is bolted securely to the head then this shouldn't happen and if it is loose it would leak out. Just something else on my "to do list" while I'm off work for Christmas, Between eating alot and putting together a bunch of toys and games of course....

 

[Jerryl]

Thanks for the link. What causes this by the way? Bad casting? Seems like if the intake is bolted securely to the head then this shouldn't happen and if it is loose it would leak out. Just something else on my "to do list" while I'm off work for Christmas, Between eating alot and putting together a bunch of toys and games of course....

Still not 100% sure what you are talking about, but most likely galvanic corrosion/errosion. But, I am unsure about that also.

I misunderstood the original post and thought you were concerned about the passages/grinding.
(that's what I get for drinking too much "spiked egg nog" )
If it is just the water port sealing surfaces that show some errosion, don't worry about it.
Use "The Right Stuff" around the holes.