skidoo_j Posted August 3, 2013 Share Posted August 3, 2013 Well I guess it's nice that I found out the dynomax black jack headers hadn't cracked, but rather the paper gasket blew out on the back tube. So now I get to spend 3-4 hours tearing it apart to replace a $2 gasket. Anyone have any recommendations on what to use to seal it so it won't happen again? The only gasket I've found to replace it locally is a felpro, am I better off ordering something different? Any permatex products that i should use along with the gasket? Link to comment Share on other sites More sharing options...
Stacks Posted August 4, 2013 Share Posted August 4, 2013 You might consider the one from Clifford performance. It's easily 1/8" thick. I was impressed with the one that came with my headers! Link to Clifford page, just scroll down a bit. http://www.cliffordperformance.net/Merchant2/merchant.mvc?Screen=CTGY&Store_Code=CP&Category_Code=J258 Also here's a link to a photo during the install. http://comancheclub.com/topic/33955-89-mj-work-truckdd-to-dd-and-4-wheeling-whenever/page-2 Link to comment Share on other sites More sharing options...
skidoo_j Posted August 5, 2013 Author Share Posted August 5, 2013 You might consider the one from Clifford performance. It's easily 1/8" thick. I was impressed with the one that came with my headers! Link to Clifford page, just scroll down a bit. http://www.cliffordperformance.net/Merchant2/merchant.mvc?Screen=CTGY&Store_Code=CP&Category_Code=J258 Also here's a link to a photo during the install. http://comancheclub.com/topic/33955-89-mj-work-truckdd-to-dd-and-4-wheeling-whenever/page-2 I had read your thread the other day, and was debating on the clifford header or the banks header if mine does turn out cracked. Was there anyway you could have modified the header of intake to keep the oem intake? I thought I read you couldn't use the 99 intake on our blocks? I was originally looking at a '99 intake and trying to figure out if i could adapt my tb to that intake easier. Link to comment Share on other sites More sharing options...
Stacks Posted August 6, 2013 Share Posted August 6, 2013 I went a bit off the wall with my motor rebuild/swap. The block and head are from a '93 YJ. I figured it was easier to retain the RENIX electronics than change wiring etc. The issue with the Clifford headers and the RENIX intake is the header tubes angle back too soon after exiting the head. You could possibly dent in the header tube to get the needed clearance but I decided it would probably be more excessive than I wanted. re: too much restriction on the header tubes. At least the front two tubes would need to be modified and possibly more. Adapting the RENIX TB to the HO intake wouldn't be too bad at all. A 1/2" piece of aluminum and some time on the drill press and you got it. As far as Clifford or Banks for the header... I don't think you could go wrong with either one. They have both been at this for quite awhile, Clifford much more so but both have proven track records so to speak. I went with the Clifford headers cuz of the dual outlets for the stacks. With only 18" glass packs it is definitely loud and noisy when you get your foot into it but I like it and hey... my ears aren't what they used to be. LOL Hope my babbling is of some help!! Larry Link to comment Share on other sites More sharing options...
skidoo_j Posted August 26, 2013 Author Share Posted August 26, 2013 Was the cliford gasket steel cored? The felpro one is, but is like an aerated card board over it. The exhaust ports have a metal ring on them. The felpro is 1000x better then the paper gasket that came with my dynomax headers. But I like the 1/8" thick idea Link to comment Share on other sites More sharing options...
Stacks Posted August 27, 2013 Share Posted August 27, 2013 The Clifford gasket is not steel cored and has no metal ring on the exhaust ports.. They appear to be made of a similar material that the older Mr. Gasket header gaskets were made of. I ran a set of those gaskets for better than 10 years on a heavily built up 273ci Mopar with headers and did not have any problems with them leaking or burning out. One plus for the Banks headers is that the tubes are welded on both sides of the flange and the head side is machined flat after the tubes are welded and the flange is quite thick too as is the flange on the Clifford's. Hope that helps a bit!! Later, Larry Link to comment Share on other sites More sharing options...
skidoo_j Posted August 27, 2013 Author Share Posted August 27, 2013 The Clifford gasket is not steel cored and has no metal ring on the exhaust ports.. They appear to be made of a similar material that the older Mr. Gasket header gaskets were made of. I ran a set of those gaskets for better than 10 years on a heavily built up 273ci Mopar with headers and did not have any problems with them leaking or burning out. One plus for the Banks headers is that the tubes are welded on both sides of the flange and the head side is machined flat after the tubes are welded and the flange is quite thick too as is the flange on the Clifford's. Hope that helps a bit!! Later, Larry Have you fit the banks or clifford header to a renix era 4.0? they're only listing that they fit the ho with the different head. I'd love to change to a clifford or banks, but I don't want to have to replace the top end of the motor to do so. Link to comment Share on other sites More sharing options...
Stacks Posted August 29, 2013 Share Posted August 29, 2013 I have not tried to fit either one to a RENIX 4.0. You might call Clifford and talk to them. Most likely you will end up talking to Larry Clifford, the man himself. and he's really easy and pleasant to talk to and very knowledgeable to say the least. He's also very up front and will most likely tell you why or why not on their headers and a RENIX 4.0. Link to comment Share on other sites More sharing options...
Htchevyii Posted September 16, 2013 Share Posted September 16, 2013 Be careful mixing and matching headers and gaskets. I had a Pacesetter header and bought a Clifford gasket thinking that it would be an upgrade. It did not properly match the header and soon I was replacing the gasket again. The gasket that I bought from Pacesetter had smaller cutouts for the ports than the Clifford. Eventually, I ended up just putting a new stock replacement manifold on. Link to comment Share on other sites More sharing options...
cruiser54 Posted September 16, 2013 Share Posted September 16, 2013 Felpro will be just fine. Put it on dry. Tighten the bolts evenly from the center to the outside. Link to comment Share on other sites More sharing options...
skidoo_j Posted September 25, 2013 Author Share Posted September 25, 2013 According to the FSM when replacing the intake manifold gasket I'm to drain the coolant system? When I installed the headers I did follow the FSM and drained the system, but is it necessary? I don't remember removing any heating or cooling hoses and don't recall any of the bolts getting sealant put them to seal for water... I"m just thinking it would save some time and money to not drain it. Link to comment Share on other sites More sharing options...
cruiser54 Posted September 25, 2013 Share Posted September 25, 2013 According to the FSM when replacing the intake manifold gasket I'm to drain the coolant system? When I installed the headers I did follow the FSM and drained the system, but is it necessary? I don't remember removing any heating or cooling hoses and don't recall any of the bolts getting sealant put them to seal for water... I"m just thinking it would save some time and money to not drain it. No need to drain on a 4.0. Link to comment Share on other sites More sharing options...
Crash Posted September 25, 2013 Share Posted September 25, 2013 The renix system has EGR, which is why 99.9% of headers listed are for 91-00. Most of them should fit, otherwise. You would technically need to "modify" the header to accept the egr tube. Just make sure you use the renix gasket. Link to comment Share on other sites More sharing options...
cruiser54 Posted September 25, 2013 Share Posted September 25, 2013 I have HO manifolds on 2 REnix Jeeps. Requires a later model downpipe, with an O2 sensor bung welded into it and a fitting welded on to the manifold for the EGR tube. Link to comment Share on other sites More sharing options...
skidoo_j Posted September 25, 2013 Author Share Posted September 25, 2013 I have HO manifolds on 2 REnix Jeeps. Requires a later model downpipe, with an O2 sensor bung welded into it and a fitting welded on to the manifold for the EGR tube. Factory or aftermarket? No issues with the headers contacting the intake? Link to comment Share on other sites More sharing options...
cruiser54 Posted September 25, 2013 Share Posted September 25, 2013 Aftermarket. Slight filing on the intake manifold. I have a photo of the filing but am such a dumbass that I can't post photos on CC. Link to comment Share on other sites More sharing options...
skidoo_j Posted September 26, 2013 Author Share Posted September 26, 2013 Aftermarket. Slight filing on the intake manifold. I have a photo of the filing but am such a dumbass that I can't post photos on CC. What brands? Which model? Maybe I'll jump for a new header instead of just the gasket :) Link to comment Share on other sites More sharing options...
cruiser54 Posted September 26, 2013 Share Posted September 26, 2013 Aftermarket. Slight filing on the intake manifold. I have a photo of the filing but am such a dumbass that I can't post photos on CC. What brands? Which model? Maybe I'll jump for a new header instead of just the gasket :) APN or an ebay one with the little "bellows" looking things on it. Link to comment Share on other sites More sharing options...
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