Haha ^^^^^^^^^
Damn this thread has over 20k views.
That hose is cheap ($12?) if I remember correctly, then you need to cut it off and mate the fitting out of the valve cover into it and clamp/ziptie it. Alternatively, just head down to Home Depot and get a hose barb fitting with a 90 degree elbow so you are not fighting a collapse in the radius of that tight turn.
Bolt Locator.jpg
From what I can tell on a Gen IV the compression limiters only serve the purpose of bolt alignment, and they don't do a great job at that. I was thinking about machining up a part as shown that would replace the OEM part to serve the following purpose:
- More precise bolt alignment (OEM is sloppy)
- Distribute weight across the top surface to reduce potential compression of composite
For those who have installed these, would this have made the installation easier or should I just cut the OEM limiters, get washers to distribute the load and call it a day?
Yes, I'm trying to decide if I want to do them. Further analysis revealed that the manifold is not very accurate, it also has a raised section that accepts the screw head. The good news is that the raised section could locate this piece, preventing it from turning, and a compression limiter as shown might be possible. The bad news is that the manifold has +/- 0.030" of error along the weld, basically the bottom aligning with the top.
The other bad news is that depending on quantity, 20 of these will cost $250 - $450 per manifold. I'm not really sure if it is worth it, if they will work, if anyone would buy them.... So I'm trying to decide what I want to do while triple checking my measurements.
Bolt Locator - Compression Limiter.jpg
It only took a few hours to hand fit mine with the bevel on the edge. I know that is not for everyone....
Final Bolt Rendering.jpg
OK guys, I decided to pull the trigger on 2 sets of these. I simplified the design some to reduce the manufacturing cost. I also added flats so that the limiter could be aligned with a 15mm wrench as required. If they work and there is interest they will be between ~$95 and $135 (for a set of 20, black type III anodized), depending on how much interest I have in them.
Doug, great idea at a fair price. One question though, did you check the depth on all the intake bolt holes to confirm? The reason why I ask, is that when I was measuring mine to cut down, I measured different thicknesses for the mounting flange at different points of the intake.
Ron,
Yes, the intake has varied thicknesses across the board. This is something that had me on the fence producing these. Measuring for this (10 times over) was driving me nuts and it was not straight forward. I suppose I figured there is no way I could cut them accurately enough by hand so I might as well take an educated guess at a length and at least I would know what I had.
My thought was to have the limiter be slightly shorter than the shortest manifold "thickness" so it would not interfere and prevent a good seal. I'm thinking the "thicker" areas of the manifold with will compress but only to the length of the limiter worst case. So in theory there is going to be varied compression of the intake manifold around each bolt, but the installation should be consistent and prevent too much compression. I'll know more when the parts arrive next month. I will test fit them and measure the gap in length between the intake manifold and limiter and adjust from there as needed.
I agree with your thought process, especially considering mine would allow continued deformity of the manifold if continually torqued to 96 in-lbs. That should work great. The key to basically to keep compression on the rubber o-ring on the intake mating surface. I'd like to talk with you about a set once you finish.
The prototypes arrived today. Good news / Bad news.
They fit very nicely around the bolt and are snug in the manifold. The bolt does not wobble around at all as with the OEM version. I Think these will work well for their intended purpose. The flats are nice to have to orient the limiter once it is completely pushed into the hole. The bad news is that I want to tweak some of the measurements of the angle to make it a more perfect fit, so that means more waiting before the install.
Right now it looks like about 5 people are interested, here's the price breakdown. If there is more interest the cost will go down for everyone. Note the final version will be anodized black.
QTY 5: $135 / set
QTY 10: $110 / set
QTY 20: $100 / set
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