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Jeep Wrangler YJ
YJ Build Threads & Member's Rides
1995 Sahara project
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<blockquote data-quote="Plastic Fury" data-source="post: 442084" data-attributes="member: 21352"><p>Back to it..............</p><p></p><p>I still wanted to replace the core plugs at the back of the block, especially after seeing how rusted the 5 were on the side. You can reach the two at the back of the block but the one at the back of the cylinder head is pretty much impossible as it's too close to the firewall to reach. As I laid under the Jeep looking at the engine with the transmission removed, I kept thinking that I would be a fool to not just pull the motor at this point and do it right. Considering I had all the accessories removed and the trans gone, once I got the hoist out it would take about 10 minutes to pull it. Easy decision.</p><p></p><p>I am damn glad I made that choice, even with all the engine flushing I did, I had NO idea how much sludge and rusted crap was still sitting in the block, especially to the back.</p><p></p><p></p><p>Pulling it out</p><p></p><p>[ATTACH=full]122851[/ATTACH]</p><p></p><p>[ATTACH=full]122852[/ATTACH]</p><p></p><p>[ATTACH=full]122853[/ATTACH]</p><p></p><p>I pulled the two remaining core plugs on the back of the block and the plug at the back of the cylinder head.</p><p></p><p>[ATTACH=full]122854[/ATTACH]</p><p></p><p>And as expected, they were pretty damn corroded and nasty. I then stuck my finger down into the back of the block and discovered about an inch thick of sludge and crap.</p><p></p><p>[ATTACH=full]122855[/ATTACH]</p><p></p><p>I decided to hoist it up and just start blasting the hose through it. Then i began wondering how truly bad it was between the cylinder walls. So apparently, I like doing things twice and I banged out the new brass plugs I had just previously installed down the side of the block. It was worth the extra work as I was really able to blast out buckets of crappy water and sludge from the block and head that I wasn't able to get from just flushing water through the block while the engine was in the Jeep.</p><p></p><p>[ATTACH=full]122862[/ATTACH]</p><p></p><p>[ATTACH=full]122858[/ATTACH]</p><p></p><p></p><p></p><p></p><p></p><p>The block probably should have been hot tanked at this point but I was going to roll with it, hoping that after running some real coolant and distilled water for some time, then a good flush, it would be in much better shape. Time will tell.</p><p></p><p>While the motor was out, did a good inspection of the bay just looking for any other potential issues to fix while it's out.</p><p></p><p>[ATTACH=full]122857[/ATTACH]</p><p></p><p>I used compressed air to dry the block/head and reinstalled all new core plugs. Did some more clean up of the block and head and tossed it back into the Jeep.</p><p></p><p>[ATTACH=full]122859[/ATTACH]</p></blockquote><p></p>
[QUOTE="Plastic Fury, post: 442084, member: 21352"] Back to it.............. I still wanted to replace the core plugs at the back of the block, especially after seeing how rusted the 5 were on the side. You can reach the two at the back of the block but the one at the back of the cylinder head is pretty much impossible as it's too close to the firewall to reach. As I laid under the Jeep looking at the engine with the transmission removed, I kept thinking that I would be a fool to not just pull the motor at this point and do it right. Considering I had all the accessories removed and the trans gone, once I got the hoist out it would take about 10 minutes to pull it. Easy decision. I am damn glad I made that choice, even with all the engine flushing I did, I had NO idea how much sludge and rusted crap was still sitting in the block, especially to the back. Pulling it out [ATTACH type="full" alt="20240217_133916.jpg"]122851[/ATTACH] [ATTACH type="full" alt="20240217_133928.jpg"]122852[/ATTACH] [ATTACH type="full" alt="20240217_134434.jpg"]122853[/ATTACH] I pulled the two remaining core plugs on the back of the block and the plug at the back of the cylinder head. [ATTACH type="full" alt="20240217_141618.jpg"]122854[/ATTACH] And as expected, they were pretty damn corroded and nasty. I then stuck my finger down into the back of the block and discovered about an inch thick of sludge and crap. [ATTACH type="full" alt="20240217_143916.jpg"]122855[/ATTACH] I decided to hoist it up and just start blasting the hose through it. Then i began wondering how truly bad it was between the cylinder walls. So apparently, I like doing things twice and I banged out the new brass plugs I had just previously installed down the side of the block. It was worth the extra work as I was really able to blast out buckets of crappy water and sludge from the block and head that I wasn't able to get from just flushing water through the block while the engine was in the Jeep. [ATTACH type="full"]122862[/ATTACH] [ATTACH type="full" alt="20240217_153357.jpg"]122858[/ATTACH] The block probably should have been hot tanked at this point but I was going to roll with it, hoping that after running some real coolant and distilled water for some time, then a good flush, it would be in much better shape. Time will tell. While the motor was out, did a good inspection of the bay just looking for any other potential issues to fix while it's out. [ATTACH type="full" alt="20240217_135117.jpg"]122857[/ATTACH] I used compressed air to dry the block/head and reinstalled all new core plugs. Did some more clean up of the block and head and tossed it back into the Jeep. [ATTACH type="full" alt="20240218_000244.jpg"]122859[/ATTACH] [/QUOTE]
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Jeep Wrangler YJ
YJ Build Threads & Member's Rides
1995 Sahara project
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