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Help--Exhaust Manifold bolts won't stay tight #584298 01/16/10 03:25 PM 01/16/10 03:25 PM
Joined: Oct 2007 Posts: 4,323 St. Louis, Mo 3 318 Stroker OP master
318 Stroker OP master 3 Joined: Oct 2007 Posts: 4,323 St. Louis, Mo	I have an Eddy headed 318 with the 340 Hi-po exhaust manifolds. The bolts loosen every time I drive it. Is it Ok to use Lock-Tite for this application? That's the only solution I can think of to solve the problem.

Re: Help--Exhaust Manifold bolts won't stay tight [Re: 318 Stroker] #584299 01/16/10 03:46 PM 01/16/10 03:46 PM
Joined: Jul 2006 Posts: 111 California 6 6superbee9 member
6superbee9 member 6 Joined: Jul 2006 Posts: 111 California	If I was desparate I'd try lock washers (the ones that have the split in them). See what the more experienced guys come up with.

Re: Help--Exhaust Manifold bolts won't stay tight [Re: 6superbee9] #584300 01/16/10 03:50 PM 01/16/10 03:50 PM
Joined: Oct 2007 Posts: 4,323 St. Louis, Mo 3 318 Stroker OP master
318 Stroker OP master 3 Joined: Oct 2007 Posts: 4,323 St. Louis, Mo	Yes, I am desperate. Driving me crazy. I had a hodge-podge of manifold bolts in there, and just recently purchased the correct set of fasteners, with the combination of sleeve-bolts, studs w/nuts, bolts, and cupped washers, and I'm still having the problem.

Re: Help--Exhaust Manifold bolts won't stay tight [Re: 318 Stroker] #584301 01/16/10 03:51 PM 01/16/10 03:51 PM
Joined: Jul 2008 Posts: 30,431 Florida STAYcation BeEtLeJuIcE ! The village idiot's idiot
BeEtLeJuIcE ! The village idiot's idiot Joined: Jul 2008 Posts: 30,431 Florida STAYcation	I would NOT try lock-tite ... if the bolts/studs ever have to be removed ... you could mess-up the head. I would try some black or gold RTV and let it set-up well before using.

Re: Help--Exhaust Manifold bolts won't stay tight [Re: BeEtLeJuIcE !] #584302 01/16/10 03:53 PM 01/16/10 03:53 PM
Joined: Oct 2007 Posts: 4,323 St. Louis, Mo 3 318 Stroker OP master
318 Stroker OP master 3 Joined: Oct 2007 Posts: 4,323 St. Louis, Mo	Quote: I would NOT try lock-tite ... if the bolts/studs ever have to be removed ... you could mess-up the head. I would try some black or gold RTV and let it set-up well before using. That's kinda what I was thinking, and that's why I asked before doing it. On the first set of fasteners I had lock washers, and that didn't work either.

Re: Help--Exhaust Manifold bolts won't stay tight [Re: 318 Stroker] #584303 01/16/10 03:55 PM 01/16/10 03:55 PM
Joined: Jan 2003 Posts: 2,511 Tampa , Fl MoparJoe super gas
MoparJoe super gas Joined: Jan 2003 Posts: 2,511 Tampa , Fl	Yeah lock tite is fine just use the right type for the temp range, you could also try studs glued in with nuts that have locking threads. I had a Toyota that would do the same thing, I ended up running studs with locktite and staked around the holes after the studs were in place to tighten them in more, I used nuts with locking threads too, they have waves in the treads so they bite into the threads of the stud.

Re: Help--Exhaust Manifold bolts won't stay tight [Re: MoparJoe] #584304 01/16/10 11:15 PM 01/16/10 11:15 PM
Joined: May 2005 Posts: 639 Wilmington, NC donbarnes Not THAT Don Barnes!!
donbarnes Not THAT Don Barnes!! Joined: May 2005 Posts: 639 Wilmington, NC	Anyone else had this problem? Is it from the expansion rates on the aluminum heads? I just put mine back together with Eddy heads and had my 340 Hi-po manifolds Jet-Hot coated, hoping I don't end up with this problem. Totally-Stainless carries a washer that is supposed to be vibration proof, but they are imported from Sweden and cost over $3 each, and you can't use any other spacers or washers with them unless you put one on each side of the spacer- could get pricey..

Re: Help--Exhaust Manifold bolts won't stay tight [Re: 318 Stroker] #584305 01/16/10 11:35 PM 01/16/10 11:35 PM
Joined: Nov 2004 Posts: 892 USA K krw71ragtop super stock
krw71ragtop super stock K Joined: Nov 2004 Posts: 892 USA	Quote: I have an Eddy headed 318 with the 340 Hi-po exhaust manifolds. The bolts loosen every time I drive it. Is it Ok to use Lock-Tite for this application? That's the only solution I can think of to solve the problem. I use Permatex anti-seize lubricant #133K on my aluminum heads. You might also want to check your exhaust hangers and make sure the exhaust system isn't flopping around.

Re: Help--Exhaust Manifold bolts won't stay tight [Re: krw71ragtop] #584306 01/16/10 11:59 PM 01/16/10 11:59 PM
Joined: Oct 2007 Posts: 4,323 St. Louis, Mo 3 318 Stroker OP master
318 Stroker OP master 3 Joined: Oct 2007 Posts: 4,323 St. Louis, Mo	Quote: Quote: I have an Eddy headed 318 with the 340 Hi-po exhaust manifolds. The bolts loosen every time I drive it. Is it Ok to use Lock-Tite for this application? That's the only solution I can think of to solve the problem. I use Permatex anti-seize lubricant #133K on my aluminum heads. You might also want to check your exhaust hangers and make sure the exhaust system isn't flopping around. I have a tti system and everything is tight. I idled the car for 15 minutes the last two nights, to warm it up, and I had some looseness to the fasteners. As the previous poster, "donbarnes" said, I think it has something to do with the different expansion rates. I can't think of any other solution besides using anti-seize.

Re: Help--Exhaust Manifold bolts won't stay tight [Re: 318 Stroker] #584307 01/17/10 12:20 AM 01/17/10 12:20 AM
Joined: Oct 2007 Posts: 4,323 St. Louis, Mo 3 318 Stroker OP master
318 Stroker OP master 3 Joined: Oct 2007 Posts: 4,323 St. Louis, Mo	I mentioned Lock-Tite in my original post, and anti-seize has also been mentioned. Does anti-seize have "locking" properties, or strictly "anti-seize" properties?

Re: Help--Exhaust Manifold bolts won't stay tight [Re: 318 Stroker] #584308 01/17/10 12:27 AM 01/17/10 12:27 AM
Joined: Jul 2009 Posts: 102 Virginia M MACDiesel member
MACDiesel member M Joined: Jul 2009 Posts: 102 Virginia	You should MOST DEFINATELY be using anti-sieze on the threads. It doesn't make your spark plugs back out so it won't make your fasteners back out. (you are using it on your plugs right?) Anti-sieze is way cheaper than having to pull your heads and have them tapped for helicoils and replacing the head gaskets. Use it any time you use a steel fastener on an aluminum part. Split type lock washers should stop the loosening. Studs are awesome because they go from course thread to fine thread which has better torque retention and vibration resistence. If you want the ultimate in torque retention you could always get bolts drilled for safety wire like the NASCAR and other racing guys do. If you do it right, the bolts CAN NOT MOVE. If your scared of lockwire then you can try Stage 8's locking bolts. They're pricey but they can't back out unless you disassemble them. You have options. I like the mechanically locking hardware around high heat. Metal won't melt, plastic and chemicals will. Try some new Grade 8 bolts and split lock washers first. That shouldn't cost more than $10. -1967 Belvedere II 440/4speed

Re: Help--Exhaust Manifold bolts won't stay tight [Re: MACDiesel] #584309 01/17/10 12:42 AM 01/17/10 12:42 AM
Joined: Oct 2007 Posts: 4,323 St. Louis, Mo 3 318 Stroker OP master
318 Stroker OP master 3 Joined: Oct 2007 Posts: 4,323 St. Louis, Mo	Thanks for the advise. Yes, I am using anti-seize on the spark plugs. I just spent good money buying the correct factory-style fastener kit for the hi-po manifolds. As I mentioned, it is a combination of sleeve-bolts, studs w/nuts, and bolts. I'm thinking of giving the anti-seize a try first, and if that doesn't work, anti-seize and lock-washers. I was using lock washers previously, and still had problems.

Re: Help--Exhaust Manifold bolts won't stay tight [Re: 318 Stroker] #584310 01/17/10 01:41 AM 01/17/10 01:41 AM
Joined: Jul 2009 Posts: 102 Virginia M MACDiesel member
MACDiesel member M Joined: Jul 2009 Posts: 102 Virginia	The guy that mentioned different expansion rates nailed it. A lot of guys helicoil all the threaded holes right from the get go. You could try selling that original kit and get those Stage 8's. They have a e-clip groove cut into the wrench flats and locking tangs that slip over the bolt heads. The locking tangs have a 12 point hole so they can be positioned properly on the bolt head. Then you lock it in place with the e-clip. If the bolt loosens the tang will hit the manifold and stop the bolt from turning. So it can't loosen more than 1/12 turn. Pretty darned fail safe. http://www.stage8.com/products_lhb.html Safety wire works too. -1967 Belvedere II 440/4speed

Re: Help--Exhaust Manifold bolts won't stay tight [Re: 318 Stroker] #584311 01/17/10 01:41 AM 01/17/10 01:41 AM
Joined: Jul 2008 Posts: 30,431 Florida STAYcation BeEtLeJuIcE ! The village idiot's idiot
BeEtLeJuIcE ! The village idiot's idiot Joined: Jul 2008 Posts: 30,431 Florida STAYcation	Hey 318 .. using anti-seize on these will make the problem WORSE. I still say use a high-temp RTV and let it cure WELL before using.

Re: Help--Exhaust Manifold bolts won't stay tight [Re: 318 Stroker] #584312 01/17/10 02:15 AM 01/17/10 02:15 AM
Joined: Jan 2009 Posts: 8 Knoxville,Md 7 70redbee member
70redbee member 7 Joined: Jan 2009 Posts: 8 Knoxville,Md	If you have studs and nuts,try double nutting to keep them tight.

Re: Help--Exhaust Manifold bolts won't stay tight [Re: 70redbee] #584313 01/17/10 09:07 AM 01/17/10 09:07 AM
Joined: Jan 2003 Posts: 21,073 Niles , Ohio T therocks oh wait.but hey.lets see.oh yeah.
therocks oh wait.but hey.lets see.oh yeah. T Joined: Jan 2003 Posts: 21,073 Niles , Ohio	I use studs in my aluminum heads except for 1 or 2 that wont fit with headers.I use antisieze on them.2 years of street driving and they never come loose.I use the larger thick flat washers on mine also.Rocky Chrysler Firepower

Re: Help--Exhaust Manifold bolts won't stay tight [Re: 318 Stroker] #584314 01/17/10 10:16 PM 01/17/10 10:16 PM
Joined: Jul 2005 Posts: 757 Toronto, Ont, Canada boydsdodge super stock
boydsdodge super stock Joined: Jul 2005 Posts: 757 Toronto, Ont, Canada	How did you get them to fit? you must have done a ton of grinding to the heads. I have a pair of Edelbrock closed chambers (04 vintage I think) and wanted to install my H/P manifolds, but no go unless I did a whole bunch of grinding. Went with TTIs that slipped in easier then iron. Never a leak or losen up.

Re: Help--Exhaust Manifold bolts won't stay tight [Re: boydsdodge] #584315 01/18/10 11:11 AM 01/18/10 11:11 AM
Joined: Oct 2007 Posts: 4,323 St. Louis, Mo 3 318 Stroker OP master
318 Stroker OP master 3 Joined: Oct 2007 Posts: 4,323 St. Louis, Mo	Quote: How did you get them to fit? you must have done a ton of grinding to the heads. I have a pair of Edelbrock closed chambers (04 vintage I think) and wanted to install my H/P manifolds, but no go unless I did a whole bunch of grinding. Went with TTIs that slipped in easier then iron. Never a leak or losen up. Yep, the driver side required grinding on the head. I had the motor built by a professional Mopar engine builder, and when I picked up the motor, I noticed the ground head. Edelbrock claims that the heads are bolt-on, but you open up a whole can of worms when you use them. The heads are longer than stock, so you have to re-engineer the alternator bracket, as well as the above mentioned manifold problem. The heads are great, performance-wise, but I'm almost wishing that I had used stock iron heads instead.

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