JeepForum.com

JeepForum.com (https://www.jeepforum.com/forum/)
-   Jeep CJ Forum (https://www.jeepforum.com/forum/f8/)
-   -   CJ Aluminum Valve Cover Help (https://www.jeepforum.com/forum/f8/cj-aluminum-valve-cover-help-4400991/)

c82cj 06-15-2020 01:39 PM

CJ Aluminum Valve Cover Help
 
I'm wanting/needing to replace my stock plastic valve cover with an aluminum one. My uncle said his was simply a bolt on with no modifications needed. Everything I am seeing is saying that I have to drill and tap holes. I am not the most handy person so this is giving me a little anxiety. Does anyone have videos or pics and very detailed descriptions of how I can go about doing this myself. I would really like to save the money and have the satisfaction from doing it myself. I have a 1982 CJ-7 with a 258 engine if this helps. Thank you in advance!

Matt1981CJ7 06-15-2020 02:47 PM

Google is your friend.





c82cj 06-15-2020 07:35 PM

thanks I watched this one a few times but I really wanted to see the bottom tapping up close. That is what seems to be the hardest part.

oldschool74cj5 06-15-2020 08:53 PM

hello
i can tell you a trick i use alot for tapping a hole straight. when free handing the tapping you have the possibility of tapping at a angle. what i have is some small block that have a tapped hole in them . then what i do is screw the tap into the small block. then i set the block down over the hole i need to be tapped. with it sitting on the material that needs to be tapped i start to tap the new hole. the tapped small block guides the tap square into the hole being tapped.

the thing about tapping a shallow hole be gentle when tapping you dont want to break a tap. reverse alot and when you feel it stop dont try to get any deeper.

oldschool

MrPeter63 06-15-2020 10:02 PM

It's really not that hard... You can do it!

keith460 06-16-2020 03:44 AM

It's really not that hard, and if you want to rid yourself of the prone to leak plastic valve cover, then aluminum is the way to go.

You will need a 5/16-18 Bottom Tap for 5 holes, 3 on passenger side and 2 on the drivers side. You can drill the holes a little deeper but not more than 3/8" which will yield a 5/16 depth for tapping. A letter drill of 'F' is best and use a small shaft collar on the drill bit to control the amount of depth you drill, again 3/8" max.
Tapping cast iron does not require tapping fluid so don't use it. I would have a vacuum sucking away debris when drilling and tapping though.

c82cj 06-16-2020 11:18 AM

Quote:

Originally Posted by oldschool74cj5 (Post 40994455)
hello
i can tell you a trick i use alot for tapping a hole straight. when free handing the tapping you have the possibility of tapping at a angle. what i have is some small block that have a tapped hole in them . then what i do is screw the tap into the small block. then i set the block down over the hole i need to be tapped. with it sitting on the material that needs to be tapped i start to tap the new hole. the tapped small block guides the tap square into the hole being tapped.

the thing about tapping a shallow hole be gentle when tapping you dont want to break a tap. reverse alot and when you feel it stop dont try to get any deeper.

oldschool

Is there a place to buy the small block for a guide? I am definitely going aluminum it just depends of if I install it or take it somewhere to be installed.

Thanks everyone for the help and support. I am trying to become a little more hands on with my CJ but absolutely still a novice with repairs

Matt1981CJ7 06-16-2020 02:22 PM

I *think* the '82 head only requires tapping 2 existing holes.

OP, don't you have any mechanically inclined friends? If so, you could have the valve cover swapped out before you finished your first beer.

No time like the present to learn something new.

Matt

Renegade82 06-16-2020 09:49 PM

I *think* your right. It's been 30+ years since I changed my 82 but I believe it's only the 2 on the intake side that need tapped. The 3 on the pass side were already using bolts. The drivers/intake side used fat washer nuts to clamp down on the rim.

c82cj 06-17-2020 06:03 PM

Thanks for the help everyone. I am going to look more into it before trying. I think I can but if I mess up with will be very costly. Unfortunately I just moved to Austin from Dallas and my mechanically inclined friends are up there. Any other tips or pictures of what holes on the '82 need to be tapped would be greatly appreciated.

ccoyle71 06-18-2020 10:07 AM

Not hard at all - one of the easiest upgrades I've done. You'll say the same thing after doing it yourself. The youtube video Matt posted is the one I watched beforehand, and it was straightforward after watching that. Mine is an 86, and only required 2 holes tapped if i recall......Good luck!

JoonHoss 06-18-2020 10:47 AM

Honestly, I went through the same issue on my '83; I worried and obsessed over it, and yet the actual work to prep the engine and be ready to re-install was fully complete during my 30 min lunch at work.

I had an unKnown-to-me bad t-case Mount which made getting to the back nut a bit harder, and a couple of hiccups which seemed unique to my engine, but it really, really is not that bad at all. The flat bottom tapping was the easiest part of it all.

You got this!

Hoss

c82cj 06-19-2020 09:24 AM

Thanks y'all! I am getting pumped up now after hearing so many say how easy this is. I am gonna probably go for it. I still welcome any advice but I will let everyone know how it goes.

Axhammer 06-19-2020 10:27 AM

If you want to practice tapping threads in a hole, you could always drill a hole in some scrap cast iron the same depth as the holes in your cylinder head, and then cut some threads with a tap, in the scrap piece, before cutting the threads in your cylinder head. This would give you a little experience allowing you to get a feel for how the tap cuts into the metal. Clean & lube it often with brake/carb cleaner & WD-40, it will cut cleaner threads when clean & lubed.

Matt1981CJ7 06-19-2020 11:03 AM

If you guys watch the video I posted, the guy swaps out the factory plastic valve cover on a 1982 258, just like the OP has.

He clearly states there are only 2 existing holes that need to be tapped. The OP should not have to do any drilling.

All he needs is a bottom tap in the correct size. He will also have to replace the 2 studded rocker bridges with regular bridges. They should be supplied with the aluminum cover.

Matt


The time now is 12:54 PM.

Powered by vBulletin Version 3.8.8
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.

User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.