Rescue's Official Build Thread - 88 XJS V12 Oct 12 2019
#981
Thinking about rtv and cam covers. A recent experience, and a concern that I had done a number on one or more of 4 O2 sensors in an XK8 (I'm wondering about what others thing of this) and then, having used rtv on my XJS covers ---- is there any need to worry about the silicone in rtv, and chemicals that evaporate leaving the rtv hard-ish, and O2 sensors?
I've heard that silicone will destroy O2 sensors QUICK!
Will that amount of rtv damage O2 sensors, once the engine starts breathing if run before the rtv is completely dry?
I've heard that silicone will destroy O2 sensors QUICK!
Will that amount of rtv damage O2 sensors, once the engine starts breathing if run before the rtv is completely dry?
#982
Thinking about rtv and cam covers. A recent experience, and a concern that I had done a number on one or more of 4 O2 sensors in an XK8 (I'm wondering about what others thing of this) and then, having used rtv on my XJS covers ---- is there any need to worry about the silicone in rtv, and chemicals that evaporate leaving the rtv hard-ish, and O2 sensors?
I've heard that silicone will destroy O2 sensors QUICK!
Will that amount of rtv damage O2 sensors, once the engine starts breathing if run before the rtv is completely dry?
I've heard that silicone will destroy O2 sensors QUICK!
Will that amount of rtv damage O2 sensors, once the engine starts breathing if run before the rtv is completely dry?
The following users liked this post:
Bez74 (06-23-2021)
#984
The following 4 users liked this post by Rescue119:
#985
The following 4 users liked this post by Rescue119:
#987
#988
So I did one sanding if the ribs today. Even with 80g there is some little scratches etc I just can't get the paint out of. And my ocd won't let me continue
So I said f bomb it and repainted the ribs and calling it on this. They still look great all black and since this is not a show car I'm gonna stop trying to be fancy. I wasted 2 weeks on this.
Anyways finished product
I was kinda do the same thing on the intake manifold but now I'm just gonna keep it simple and clean and paint aluminum color like I did my rear diff cover.
Also one a side note I wouldn't recommend VHT high temp paint. I dont know what it is with it but I didn't like the way it applied. I am gonna stick with dupli-color for everything.
Gonna clean the surfaces tomorrow if I have time and put the valve covers back on so I can start taking the manifolds apart and work on all that fun stuff
So I said f bomb it and repainted the ribs and calling it on this. They still look great all black and since this is not a show car I'm gonna stop trying to be fancy. I wasted 2 weeks on this.
Anyways finished product
I was kinda do the same thing on the intake manifold but now I'm just gonna keep it simple and clean and paint aluminum color like I did my rear diff cover.
Also one a side note I wouldn't recommend VHT high temp paint. I dont know what it is with it but I didn't like the way it applied. I am gonna stick with dupli-color for everything.
Gonna clean the surfaces tomorrow if I have time and put the valve covers back on so I can start taking the manifolds apart and work on all that fun stuff
The following 2 users liked this post by Rescue119:
Greg in France (07-03-2021),
ptjs1 (07-02-2021)
#990
The following 3 users liked this post by Rescue119:
#991
The following 3 users liked this post by Rescue119:
#994
#995
#998
I almost forgot about the air rail holes lol. I should figure that out before I have to much stuff back in the way.
So there is 2 options.
Tap the hole in the intake and use a set screw
Or
https://bernardembden.com/xjs/railoff/index.htm
I think tapping the intake hole is the easier option but they have quite a carbon build up. Also I've read not to tap them while the intake is on the engine. I've also read they just go to the exhaust port of the intake so no need to worry about tapping as any little shaving will just get blown out of the exhaust.
I also took a quick measurement and the holes are about 5mm but the pipes measure 6.2mm. I tried a 6mm bolt and it seemed loose.
So maybe tap for 7mm or I have read tap for 5/16?
Here's a pic of one of of holes. Can I just put a drill bit in to clean out the crud. Only need to go in say 1/4".
So opinions
So there is 2 options.
Tap the hole in the intake and use a set screw
Or
https://bernardembden.com/xjs/railoff/index.htm
I think tapping the intake hole is the easier option but they have quite a carbon build up. Also I've read not to tap them while the intake is on the engine. I've also read they just go to the exhaust port of the intake so no need to worry about tapping as any little shaving will just get blown out of the exhaust.
I also took a quick measurement and the holes are about 5mm but the pipes measure 6.2mm. I tried a 6mm bolt and it seemed loose.
So maybe tap for 7mm or I have read tap for 5/16?
Here's a pic of one of of holes. Can I just put a drill bit in to clean out the crud. Only need to go in say 1/4".
So opinions
#999
Got the rest of the parts painted.
Just waiting for the micro switch to show up and pick up some new hardware to put it all back together
As for the holes in the intake I was able to clean one up with a drill bit and tap it for 5/16 - 18. So I ordered a pack of set screws. So next few days I'll be tapping that block... giggity
Just waiting for the micro switch to show up and pick up some new hardware to put it all back together
As for the holes in the intake I was able to clean one up with a drill bit and tap it for 5/16 - 18. So I ordered a pack of set screws. So next few days I'll be tapping that block... giggity
The following users liked this post:
Greg in France (07-07-2021)