Questions about Used JHM IM

B6/7 S4/RS4
#21

I got the chance to open up my spare manifold tonight and wanted to dispel a “theory” about the casting bolt coming loose and destroying the entire engine.

[QUOTE=mistral cytz;10055220]and remove all the bolts inside that are known to come loose and potentially drop in to a cylinder causing damage
[/quote]
If anything, Audi engineers do things for a reason; while it may not have DIY common sense value, their thought process is generally spot on.

Most of you know or have seen this so its nothing new but I performed an unscientific experiment with the bolts on the uppers/lowers:

Loosened one bolt up on the lower portion.

http://tapatalk.imageshack.com/v2/14/09/01/9130ef1df50f83a45bf44e0ac08196d4.jpg

Loosened up bolt on upper.

http://tapatalk.imageshack.com/v2/14/09/01/ffb8bfc2d28edf4b7d35f596be491d41.jpg

Sandwiched the top and bottom.

http://tapatalk.imageshack.com/v2/14/09/01/c0970cb309f6a8dd6e9f834580d141e4.jpg

The loosened bolts prevent the top from sitting properly to the bottom, creating a gap; no seal.

Experimented with one bolt screwed all the way in and one loose on last thread or two before:

Bolt screwed and hand-tightened all the way in to lower.

http://tapatalk.imageshack.com/v2/14/09/01/5374aab3b684581a4334f593cb48b8b5.jpg

Bolt sitting on one or two threads before falling out.

http://tapatalk.imageshack.com/v2/14/09/01/eb1538e0252b6f17826148994e6f9710.jpg

Again, theres a gap…even if the bottom bolt is fully seated, the top half of the manifold is not, therefore the gap.

http://tapatalk.imageshack.com/v2/14/09/01/ada198d9e935939d395f7f935679ef07.jpg

My conclusion, the likely hood of the bolt to “fall into” the engine bay is very unlikely ESPECIALLY if the manifold is bolted/sealed together; the loose bolts will block each other out and unless something happens will continue to sit in their threads.

#22

Seems very well busted with all that data… You’ll find new posters in old forums try to find things that aren’t issues and try to make them issues in order to seem more involved. Nice myth busted.

#23

Seriously, all this “well this one person said this so it’s gotta be true” hearsay within that forum is off the chain. Hehe, I know I stated a week ago that I wouldn’t frequent that forum but it’s a pet peeve of mine to see misinformation being spread…if I don’t know something, I don’t know something; why attempt to fake it?

On topic, I can see why JHM recommends the removal of the casting bolts, its more of a “CYA” (cover your ass) for the claims of “JHM modified my IM and as a result, my engine ate a loosened casting bolt that they left…now I want them to buy me a new engine!”

#24

Did you call the guy out in his post?

#25

I wouldn’t call the guy out. I’d use his attempted arrogance as a way to drive others from AZ to AR. I’d simply put a link to AR saying myth busted with testing.

#26

I know im reviving an old thread but owner finally found his stock TB and now will sell it to me. Justincredible is verifying the full range of the flap something he can do while its on the car? Can he take video of this or something he can just look at it himself and see? Sorry if its a stupid question but I don’t know and neither does he. He said he is willing to take video of whatever, just tell him how to verify it. Anything else I should ask him?

#27

He can make it real easy. Get him to take a video that will help you the most. He doesn’t even need to put it on the car just have him make sure the key is out. Plug the throttle body in then key the car up but don’t start. Watch the throttle plate go through the range. Then without starting the car push the throttle to the wot position and check to see that the throttle body works.

#28

Justin to make sure i understand this correctly. What you wrote is if it is NOT installed. correct? He hasnt taken it off yet.

So when he removes it then he can take the video of what you described? Not while installed.

#29

Yes. Or he can just leave it installed and use vagcom to do a throttle body adaption and output test that should also tell you if it’s good.

#30

Thanks alot! Ill let him know.

#31

So the box for the IM came in last night. I haven’t opened it but I just realized that I should probably buy new gaskets. Can someone confirm for me what gaskets I need.

Are the only gaskets I need the intake manifold spacer gaskets? I did get spacers so I need 4 correct?

#32

You will want new gaskets. Doesn’t require any special part #, the stock intake manifold gaskets work fine with the spacers, but yes you do need 4. Probably the most command brand is Victor Reinz.

#33

Of you bought the intake spacers from jhm and they are new you don’t need any gaskets as the spacers already came with the gaskets you need. If you don’t have any gaskets yes you will need 4 gaskets. 2 for the bottom of the intake gaskets to the cylinder heads each side and 2 for on top of the spacers to the intake manifold each side.

#34

Thanks guys. I bought the spacers used from the same guy I got the IM from. Just wanted to make sure there wasn’t anything else I was missing.

#35

Get new ones I’d say
They come in sets of 2 I think. You need 2 sets of 2 as you said. Pay good attention to torquing it down properly and check those bolts again after a few weeks. And check them once a year as they have been known to back out a bit.

#36

Blue loctite is also recomended. I think I posted the torquing procedure here somewhere, but I’ll post it again.

-Tighten from the center out in a criss-cross pattern
-Tighten all bolts evenly by hand in the pattern
-Then torque to 10Nm (88in lbs/7.3 ft lbs) in the pattern, then go back though and torque them a second time to be sure

11 14
7 10
3 6
1 2
5 4
9 8
13 12

http://i1294.photobucket.com/albums/b601/rs4elitist/DIY/9DF6A064-53D5-463E-8423-78EDC4127940.png_zpsdxnhf2bm.jpeg

#37

Thanks Saki and Euro. That will help! Ill be putting this on probably early march. I need to get it powdercoated first and im doing the headers in two weeks.

#38

That looks like it can be very helpful to new guys putting on intake spacers or just putting on a new intake manifold. Maybe make a new thread just with that information. With lots of guys searching for info now a days that would be good to have its own thread. I don’t think a lot of guys know the cross pattern tightening.

#39

You lucky man you…the JHM IMs are a rare find; been lurking and searching for a set with zero luck.

#40

LOL thanks. Took the guy long enough (3 months) to uninstall. I knew going in it would be awhile. Didnt mind though. Only thing ill need now to be all motor is Heads. Do you have to pull engine to install the heads slow? i know yours was already out.