ArdWrknTrk Posted February 27, 2018 Share Posted February 27, 2018 Was just looking at the head w/the stripped bolt hole and discovered that it has casting # F3TE 6090-JA. That would suggest these are 1993 heads, but it is a 1990 truck. Did they "pre-date" parts? In other words, did they put a 1993 casting number or engineering number on a 1990 part? No. You should have E7 heads on a 1990 truck. Someone has been there before..... But you already knew that! Link to comment Share on other sites More sharing options...
Gary Lewis Posted February 27, 2018 Author Share Posted February 27, 2018 No. You should have E7 heads on a 1990 truck. Someone has been there before..... But you already knew that! Yes, someone's been there before. So, what are the differences between E7's and F3's? And are the F3's reasonable to use? Link to comment Share on other sites More sharing options...
85lebaront2 Posted February 28, 2018 Share Posted February 28, 2018 Yes, someone's been there before. So, what are the differences between E7's and F3's? And are the F3's reasonable to use? F3s are the updated heads, slightly larger valves. Link to comment Share on other sites More sharing options...
Gary Lewis Posted February 28, 2018 Author Share Posted February 28, 2018 F3s are the updated heads, slightly larger valves. Thank you. Now to find out if I have two of them. So, they'd be fine for a stockish build? Link to comment Share on other sites More sharing options...
85lebaront2 Posted February 28, 2018 Share Posted February 28, 2018 Thank you. Now to find out if I have two of them. So, they'd be fine for a stockish build? Yes, if not, I have a pair, that at least one I think has good exhaust port bolt holes. Link to comment Share on other sites More sharing options...
Gary Lewis Posted February 28, 2018 Author Share Posted February 28, 2018 Yes, if not, I have a pair, that at least one I think has good exhaust port bolt holes. Ok, thanks. Unfortunately it is the known F3 that has the stripped exhaust bolt hole. I'll do some cleaning tomorrow and see what the passenger's side head says. Looks like the valve cover has been leaking a bit so it is greasy. Link to comment Share on other sites More sharing options...
85lebaront2 Posted February 28, 2018 Share Posted February 28, 2018 Ok, thanks. Unfortunately it is the known F3 that has the stripped exhaust bolt hole. I'll do some cleaning tomorrow and see what the passenger's side head says. Looks like the valve cover has been leaking a bit so it is greasy. Hopefully, they both match. Link to comment Share on other sites More sharing options...
Gary Lewis Posted February 28, 2018 Author Share Posted February 28, 2018 Hopefully, they both match. Had quite a bit of good luck today. First, the heads match. Both are F3TE's. But, initially I didn't have quite as good of luck with the EGR tube. Just a little bit of torque caused this. Looks like it twists off because that's a brazed joint. But, that turned out fine as I checked and the ID of the part that sticks out is about right for a 3/8" pipe tap. So I cut that off flush with the part that has a serious affinity for the manifold, threaded it, and ran a plug in. You can see there's about 1/32" left for the plug to go in, but I'll wait until I'm ready to plug it for the final time, put teflon tape and paste on it, and run it in the last little bit. Last, remember the discussion about oil pans for Big Blue? And what Huck's pan might be? Well, I pulled the dip stick tube out. Looks like the newer o-ringed one to me. And, here's the pan. No nut. The only thing that holds the dip stick tube in is the attachment to the exhaust manifold - on the bolt hole that's stripped out on the head. Â Link to comment Share on other sites More sharing options...
85lebaront2 Posted February 28, 2018 Share Posted February 28, 2018 Had quite a bit of good luck today. First, the heads match. Both are F3TE's. But, initially I didn't have quite as good of luck with the EGR tube. Just a little bit of torque caused this. Looks like it twists off because that's a brazed joint. But, that turned out fine as I checked and the ID of the part that sticks out is about right for a 3/8" pipe tap. So I cut that off flush with the part that has a serious affinity for the manifold, threaded it, and ran a plug in. You can see there's about 1/32" left for the plug to go in, but I'll wait until I'm ready to plug it for the final time, put teflon tape and paste on it, and run it in the last little bit. Last, remember the discussion about oil pans for Big Blue? And what Huck's pan might be? Well, I pulled the dip stick tube out. Looks like the newer o-ringed one to me. And, here's the pan. No nut. The only thing that holds the dip stick tube in is the attachment to the exhaust manifold - on the bolt hole that's stripped out on the head. Gary, do not use Teflon tape, exhaust manifolds get red hot under load conditions, the tape will melt. Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted February 28, 2018 Share Posted February 28, 2018 Gary, do not use Teflon tape, exhaust manifolds get red hot under load conditions, the tape will melt. Why even think about removal? If you do want to take it out, just use a brass plug. Link to comment Share on other sites More sharing options...
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