teamsmith Posted March 10, 2015 Posted March 10, 2015 I would like to use the stock HO exhaust manifold (headers) for my swap but it doesn't have the bung hole and the dowpipe won't line up with the Renix crossover pipe. Does anyone know if I can use an HO crossover/down pipe (which has the bung) and whether it might match up with the rest of the exhaust under the truck? I'm looking at Walker front pipe off Rockauto:
Crash Posted March 11, 2015 Posted March 11, 2015 The ho, non egr manifold is longer, the downpipe has the bump for O2 sensor in it
Jeep Driver Posted March 11, 2015 Posted March 11, 2015 Get your engine in and take the truck to a muffler shop and they'll make you one for $90.
teamsmith Posted March 11, 2015 Author Posted March 11, 2015 Get your engine in and take the truck to a muffler shop and they'll make you one for $90. the muffler shop will make me what for $90? A bung hole, a cross over pipe? The Walker down pipe is only $45 and it has the bung hole, although I might have to extend the wires on the o2 sensor. I was just curious if anyone had done this or otherwise had insight on whether it would mate to Cat on my old exhaust.
Rockfrog Posted March 11, 2015 Posted March 11, 2015 When I swapped to the HO manifold I used an HO down pipe and had a muffler shop splice to the old exhaust just before the Crossmember. Cost me $60.
teamsmith Posted March 11, 2015 Author Posted March 11, 2015 sweet. So I'll order the Walker down pipe with the bung and figure on some flexpipe or other adaptation to the rest. Thanks
Rockfrog Posted March 11, 2015 Posted March 11, 2015 I've often thought a short flex pipe behind the bellhousing would save the manifolds from cracking. Plan to use the Renix flange (has no crush) a custom down from that to a flex pipe behind the bell and mate that to my current exhaust. And adding bung for the 02 sensor is easy... Drill hole, have welder burn bung in. Any muffler shop will have them or they can be found at auto parts stores or even eBay for little cost.
cruiser54 Posted March 12, 2015 Posted March 12, 2015 Get your engine in and take the truck to a muffler shop and they'll make you one for $90. the muffler shop will make me what for $90? A bung hole, a cross over pipe? The Walker down pipe is only $45 and it has the bung hole, although I might have to extend the wires on the o2 sensor. I was just curious if anyone had done this or otherwise had insight on whether it would mate to Cat on my old exhaust. Wires will reach....
Rockfrog Posted March 12, 2015 Posted March 12, 2015 Yep, a careful rerouting is all that's needed and there is plenty of slack to reach the new location.
teamsmith Posted March 22, 2015 Author Posted March 22, 2015 A question regarding the egr:my plan is to use the ho exhaust manifold and renix intake, is it ok that i plug the egr port on the manifold and plug all the vacuum lines for the egr? I worry that my o2 sensor will read wrong and cause a lean condition. Thanks
cruiser54 Posted March 22, 2015 Posted March 22, 2015 A question regarding the egr:my plan is to use the ho exhaust manifold and renix intake, is it ok that i plug the egr port on the manifold and plug all the vacuum lines for the egr? I worry that my o2 sensor will read wrong and cause a lean condition. Thanks Don't worry about that.
teamsmith Posted March 22, 2015 Author Posted March 22, 2015 Thanks cruiser. Any idea what thread size i need to plug the port on the intake? It looks like maybe one inch. Thanks
Jeep Driver Posted March 22, 2015 Posted March 22, 2015 Cut off the fitting from the tube and make your own plug. The thread size is unique and you will not find a plug for it. Image Not Found
cruiser54 Posted March 22, 2015 Posted March 22, 2015 I think it's metric. I can go check an old EGR tube later if you want. Busy with family stuff today.
Jeep Driver Posted March 22, 2015 Posted March 22, 2015 I think it's metric. I can go check an old EGR tube later if you want. Busy with family stuff today. I took it to my local hydraulic shop and no match. I doubt you will find an off shelf fitting to plug it with.
Jeep Driver Posted March 22, 2015 Posted March 22, 2015 Well, there you go then, BMW oil drain plug........$6 http://www.bavauto.com/fland.asp?part=33%2011%207%20525%20064&utm_source=google&utm_medium=cse&utm_term=33117525064-M6CONVERTIBLE-2008-587854&gclid=CjwKEAjw0LmoBRDHuo7UkaKXhn8SJADmDTG0LBcNEMrKGiREhtUCrg4R6dlOROMmbMOuOo0Ch-wexhoC4qPw_wcB
Jeep Driver Posted March 22, 2015 Posted March 22, 2015 Oh, yeah.........and it'll cost you $18 for the wrench that fits it.................lol
cruiser54 Posted March 22, 2015 Posted March 22, 2015 22mm x 1.5 I just got home. Thanks. I knew it was mumblemeters.
Eagle Posted March 22, 2015 Posted March 22, 2015 Oh, yeah.........and it'll cost you $18 for the wrench that fits it.................lol Oh, come on. It's a one-time installation. Most of us already have the proper tool.
Rockfrog Posted March 22, 2015 Posted March 22, 2015 I still have yet to get the stock pipe out of the stock Renix manifold, it takes a 27mm wrench BTW (common enough up here in metric igloo land). They come off the intake easily enough, but I don't want to mangle them as the pipe and exhaust manifold are near mint - no cracks and barely crusty. Be a shame to destroy them, someone will have a need. In any event, I swapped a HO intake, head, and exhaust onto my renix block. Runs great with no EGR, no issues what so ever. I was even getting 20-22mpg pre swap with the EGR system removed and tossed. Now I'm pushing 18 post swap but my exhaust manifold is warped and I have an exhaust leak when cold. And I have a crap load more power with the larger TB, she pulls something fierce, so power take gas, so I guess I'm still doing good. Haven't bothered to track it since the 32's went on though, speedo is now 10-ish km/h slow at 110km/h ... Needs correcting.
teamsmith Posted March 23, 2015 Author Posted March 23, 2015 Thanks guys. I appreciate the wealth of answers. I found on NAXJA that the downpipe port calls for a 7/8 x 18 so I assumed the intake side would be SAE as well. I was about to order a oil drain plug from a 1963 Jeep off OReilly's based off that information. Maybe 7/8 and 22mm are so close you can get them both into the hole? http://www.naxja.org/forum/showthread.php?t=1042154 So I guess I'll order the plug from the Bavarian. I haven't ordered from them since I gave up on chasing gremlins in my E60 and traded it in. Ah the memories. Thanks again.
Rockfrog Posted March 23, 2015 Posted March 23, 2015 A drain/fill plug from an older NP tcase will work, the ones with the giant (1 3/16") her heads (so 80's to mid 90's).
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