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Topic Summary

Posted by: Austin
« on: August 25, 2015, 08:32:01 AM »

Does anyone have any experience rebuilding the waterpump and oil pump?
Posted by: PaulS
« on: July 23, 2015, 12:13:20 PM »

I find myself at pretty much the same point in my rebuild!  I haven't got the valves out yet.  I don't think my block needs much more than a honing, though.  Perhaps get the valve seats cleaned up.  I'll let a machine shop do all that, including the hot tanking.  I'll have them look at the crank, too.
Posted by: Ryan_289
« on: July 18, 2015, 09:53:36 AM »

You might check with the machine shop and see how much it would be to hot tank the motor.  It will get the insides completley cleaned out.
Posted by: Austin
« on: July 14, 2015, 05:33:48 PM »

Found a machine shop to do the work on my block. He is going to bore it out for $150 (which I thought was reasonable) install new guides, and clean the valve seats up. He is also going to check my crank for wear and help me size up some new rings. In the mean time I'm going to work on getting this block cleaned up.
Posted by: Dutch_Jeeper
« on: July 14, 2015, 07:56:05 AM »

Found some good info on the CJ2a page  :)

http://www.thecj2apage.com/forums/engine-overhaul-valve-seat-cutting_topic12592.html

http://www.thecj2apage.com/forums/engine-overhaul-valve-grinding_topic12558.html

Posted by: Dutch_Jeeper
« on: July 13, 2015, 04:36:29 PM »

Most engines have replacable valve guides, removing and installing is ussually a specialist job requiring the proper tools or you could ruin your engine. They are pressed in and need to be pressed out, not hamered.

First thing i noticed though is the state of the valve seat, looks pretty damaged on the bottom of the picture. You are never going to get a good seal between seat and valve there, grinding in a new valve will not be enough.

They need to be machined and you probably need hardened valve seats installed to repair it. There are valve cutting tools that use the valve guide as centerpoint to "freshen" up the seats. But again this is better left to a specialist since most of the time the seats need to be cut at different angles. Again getting it wrong is ruining your engine.


As for cleaning the engine for painting, use paintstripper, steel wire brush degrease and spraypaint with heat resistant paint. However the best way is to plug any holes fabricate a cover for the top side and sandblast it with a rough grain, this cleans it up in the best way possible and leaves a clean but rough finish for the new paint to stick to.
Posted by: Austin
« on: July 13, 2015, 03:47:15 PM »

Got another question. Now that I have the block striped down, I was wondering what the best way to clean to remove all the rust and flacking paint so that I can put a fresh coat of paint on it.
Posted by: Austin
« on: July 13, 2015, 03:39:39 PM »

Got all the valves removed. Everything for the most part has been striped off the block. I'm not sure what they are called but was wondering if the part at the top of the block that the valve slides through is replaceable. I was noticing that one in particular looks damaged. To me it looks like it is pressed in.
Posted by: Dutch_Jeeper
« on: July 13, 2015, 12:08:13 PM »

Not familiar with the L134 valves yet, but for my old Alfa Romeo engine i used a modified C-clamp. A sliding arm clamp would also work. You only have to modify the "static" end. If it is wide enough grind/cut a slot/V/U in the middle so you can fit it around the valvestem or weld someting U shaped on (is that the correct name btw? valvestem? my grammar is a bit rusty, and technical terms are in serious need of restoration  ;) :) )
Posted by: Austin
« on: July 13, 2015, 10:56:56 AM »

Engine block striped down. I'm waiting to find a valve spring decompressor finish.
Posted by: Austin
« on: July 13, 2015, 10:43:14 AM »

Made use of my backhoe to get the engine out.
Posted by: Austin
« on: July 13, 2015, 10:41:13 AM »

3a with the doner engine
Posted by: Austin
« on: July 13, 2015, 10:38:00 AM »

The l134 in my 3a has lost so much compression, the same hill I use to climb at 35+ my top speed is now 20 or 25. Not to mention the rate of oil loss is significant plus I have a blown head gasket. Can't say I was disappointed, because so far I have gotten over 900 miles out of a engine that had been sitting in a field for over 30 years that I had to do very little to get going. Pulled the motor out of one of my parts jeeps over the weekend, and so begins my rebuild. I have never rebuilt a engine before, but so far pulling it apart has been gravy. I had my doubts to about using a engine that I have never heard or seen running, but so far I am very pleased with how everything looks inside.