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ccnoel123

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Posts posted by ccnoel123

    Bungled exhaust stud threads

    in 90-95 WD21 Pathfinders

    Posted

    Ok. So here is an update of what went down so far on this project. We took the heads to my friend's dad's machine shop. We had to make jig so that we could mount the heads on the milling machine. fc6eba7428e57713f9e74845b97d351b.jpg85eef51e23217d280d622203044ca80a.jpgd451bbd6e44300cfd1251dc1e7b645be.jpg As you can see, we first drilled out each hole then tapped themnto accept helicoil inserts. The one where someone had tried to drill out the stud and the drill walked into the head we had to drill and insert a 10 mm helicoil into and I found a 10mm - 8mm stud at the local Coastal Farm and Ranch store. As the hole wasn't quite on center, I had to grind out the hole on the headers so everything fit. Now it's all back together with a new water pump, timing belt, head gaskets, fuel injector cushions (purchased at my local Nissian dealer as I couldn't find them anywhere else and they only cost $14.00 for 6 of them), a K and N air filter element and I installed a transmission cooler. I had a little bit of trouble getting the timing right as the picture in the 1994 Service manual didn't match up but with a bit of trial and error me and a friend were able to get it running smoothly. I am veey happy that a now have a set of Pacesetter headers on my Pathy! 5bd196eb251500d5f22f0eb3f683b759.jpg and I forgot to mention I also put in a new fuel filter while I was at it. Next up is to change the tranny fluid out and install a new filter and new pada on the back brakes and I should be good to go fir another 50,000 until it's time fornanother timing belt and water cooler. I loved how easy it was to work on this car. Maybe all automotive engineers should be schooled in Japan!

    Bungled exhaust stud threads

    in 90-95 WD21 Pathfinders

    Posted

    First off I'd like to thank everyone for all of the advice that they have given me. I found out today from my friend who has been helping me that his dad has offered to let us use his machine shop and some of his time to repair these heads. I all ready purchased the gasket kit which includes the valve seats so it looks like a complete rebuild and repair of the heads. The water pump was leaking so that and the timing belt are being replaced along with the spark plugs. I also plan to change ALL the fluids, rear end, transfer case etc, flush and refill the tranny and then do a Sea Foam clean on the engine and did I mention that I also need to put in new radiator and while I'm at it I plan to install a tranny cooler as well. Then off to the Russian guy to get a $39,99 front end alignment. Whew. One hopes that the truck will last quite some time after this! Thanks to everyone and I'll post pics of the finished product!

    Bungled exhaust stud threads

    in 90-95 WD21 Pathfinders

    Posted

    Ok. So I went and relooked at my heads. This is what I found. On the drivers side on the top hole, it looks like someone tried to drill out the droken stud and drilled a hole off-center. 31a91971270d12e2e35fd71db9aee159.jpg The hole on the bottom still has the broken off stud in it 230e05dfa1153d2ea8fd937471e87136.jpg On the passenger side, it looks like the studs were drilled out and the holes are about an 1/2 inch deep and I can insert an 8mm stud in them but it's loose and wobbles. 845119114018d90bd6e9e1cd5f733d38.jpg6cb50c41d9a69845a44dbe45c9829047.jpg So I know enough that I wont be able to fix the off center drilled holenwith the head still in the truck and I quess my options are:

    1. Remove the broken stud and replace it on the drivers side and call it good. I'll still have 1 stud missing and may suffer an exhaust leak due to this.

    2. Take the head to a machine shop and have it fixed. Lord knows I can't really afford to do this.

    3. Replace the heads. The Pathdinder I got the headers from.last weekend is still sitting in the junk.yard with food studs all the way around. I already bought a head gasket kit and all the tools needed. What would you do?

    Bungled exhaust stud threads

    in 90-95 WD21 Pathfinders

    Posted

    I bought a 93 Pathfinder a few months ago. I noticed that the exhaust manifold leaked so I took it back to the place where I bought it and he had his mechanic "fix" it. Needless to say his repair didn't last long. I decided to do so myself. So I'm mid installing a set of Pace-Setter headers that I got out of the junk yard for $50.00. :rolleyes: Today I took the stock manifolds off and low and behold, there was good news and bad news. The good news is that 8 of the 12 studs are all brand new! The bad news is that 4 of the holes are completely trashed. :( It looks like he may have tried to drill out the broken studs but that's all he did. On the drivers side the first two studs towards the front of the engine are missing and there is no threads left. The same on the passenger side but these are the two towards the back of the engine. At least the holes are in an easy to reach position. My question is, can I drill through these holes or is there something important like a water jacket behind them or can I install Helicoils in a "blind" hole here?

    Cylinder head swap

    in 90-95 WD21 Pathfinders

    Posted

    I have 93 Pathfinder and as usual the passenger side exhaust has a 2 broken studs. I found a 92 in the junk yard that has a set of headers on it already. i also want to replace the timing belt as the truck has 222k on it. My question is should I just swap over the heads or just the stock exhaust manifold with the headers off of the one in the junk yard.

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