Head Gasket on 429 - If it were put on upside down, what would happen? - 63/64 Cadillac Website2024-03-29T05:22:53Zhttps://6364cadillac.ning.com/forum/topics/head-gasket-on-429-if-it-were-put-on-upside-down-what-would?commentId=6543066%3AComment%3A271388&feed=yes&xn_auth=noThe head gasket can go on wro…tag:6364cadillac.ning.com,2021-11-12:6543066:Comment:2787902021-11-12T19:10:41.609Z3b0iz1uxl3e46https://6364cadillac.ning.com/xn/detail/u_3b0iz1uxl3e46
<p>The head gasket can go on wrong but it only fits properly one way. If a hose blew off the first two times it seems that a water port has been plugged off on one or maybe both sides. As for compression, it should be good right from the start. It will get better as the rings get broken in but without reasonable compression the engine won't start.</p>
<p>A fresh set of head gaskets installed correctly should fix the issues you have. Be sure to check your radiator and heater core for signs of…</p>
<p>The head gasket can go on wrong but it only fits properly one way. If a hose blew off the first two times it seems that a water port has been plugged off on one or maybe both sides. As for compression, it should be good right from the start. It will get better as the rings get broken in but without reasonable compression the engine won't start.</p>
<p>A fresh set of head gaskets installed correctly should fix the issues you have. Be sure to check your radiator and heater core for signs of damage as if the pressure was high enough to blow a hose off it may have been too high for them. </p> I know that is a big relief!…tag:6364cadillac.ning.com,2021-05-07:6543066:Comment:2719252021-05-07T02:11:52.565ZJason Edgehttps://6364cadillac.ning.com/profile/jasonedge
<p>I know that is a big relief! You expect the worse and when it turns out not to be so bad you will enjoy the results that much better. In other words you appreciate a good running engine when you get past a scare like that. Get that water pump in check you should be for smooth cruising in the coming months.</p>
<p>I know that is a big relief! You expect the worse and when it turns out not to be so bad you will enjoy the results that much better. In other words you appreciate a good running engine when you get past a scare like that. Get that water pump in check you should be for smooth cruising in the coming months.</p> I ran the car this evening, a…tag:6364cadillac.ning.com,2021-05-07:6543066:Comment:2720242021-05-07T00:37:03.392ZWilliam R Contehttps://6364cadillac.ning.com/profile/WilliamRConte
<p>I ran the car this evening, and it ran very well, at 186 degrees at the T'Stat housing. Temp gauge read normal, about 1/3 of the way up or so. Same as it did in the past. This time I repainted the radiator support and fan shroud, and put them in, along with the fan. That helped. My water pump pulley has a slight wobble right now, so I have to get on that and check that I have it in completely straight. I suspect I don't!</p>
<p>End cause was the air pocket in the cooling system, that I…</p>
<p>I ran the car this evening, and it ran very well, at 186 degrees at the T'Stat housing. Temp gauge read normal, about 1/3 of the way up or so. Same as it did in the past. This time I repainted the radiator support and fan shroud, and put them in, along with the fan. That helped. My water pump pulley has a slight wobble right now, so I have to get on that and check that I have it in completely straight. I suspect I don't!</p>
<p>End cause was the air pocket in the cooling system, that I foolishly missed, the first time I ran it. This caused the head gaskets to go. I replaced the head gaskets, and compression in the three low comp corner cylinders increased quite a lot. So did a couple of others. I still have lower compression on three out of the four corner cylinders, but it has just shy of a half hour run time on it now. It runs smoothly and quietly with no load, thus far. It got better after I adjusted the timing and dwell. It really runs nicely. Those three lower comp cylinders are the only spoiler.</p>
<p>So now I continue on with the reassembly of the car.</p> I noticed that too, and thoug…tag:6364cadillac.ning.com,2021-05-02:6543066:Comment:2718452021-05-02T15:06:13.868ZWilliam R Contehttps://6364cadillac.ning.com/profile/WilliamRConte
<p>I noticed that too, and thought it strange. I bought Fel Pro gaskets from RockAuto, the last pair they had. They matched up hole wise with what came out. I expect to be re installing the radiator support today, and possibly the fan shroud too. I will probably start it tomorrow, and see what happens.</p>
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<p>I noticed that too, and thought it strange. I bought Fel Pro gaskets from RockAuto, the last pair they had. They matched up hole wise with what came out. I expect to be re installing the radiator support today, and possibly the fan shroud too. I will probably start it tomorrow, and see what happens.</p>
<p></p> I brought this up in my rebui…tag:6364cadillac.ning.com,2021-05-02:6543066:Comment:2717622021-05-02T04:12:40.390ZKim K Kaiserhttps://6364cadillac.ning.com/profile/KimKKaiser
<p>I brought this up in my rebuild in Feb. i also ordered another gasket, and it was different than the first one!! same supplier!!!i "made a note of that <span>Holes in heads, gaskets, and block are not a 100% one for one match"</span></p>
<p>I brought this up in my rebuild in Feb. i also ordered another gasket, and it was different than the first one!! same supplier!!!i "made a note of that <span>Holes in heads, gaskets, and block are not a 100% one for one match"</span></p> That's great news. Glad it wa…tag:6364cadillac.ning.com,2021-04-30:6543066:Comment:2716842021-04-30T19:48:05.582ZJason Edgehttps://6364cadillac.ning.com/profile/jasonedge
<p>That's great news. Glad it wasn't any thing major.. just a pain in the you know what to disassemble and reassemble.</p>
<p>That's great news. Glad it wasn't any thing major.. just a pain in the you know what to disassemble and reassemble.</p> I see that I did not mention…tag:6364cadillac.ning.com,2021-04-30:6543066:Comment:2718412021-04-30T19:37:48.833ZWilliam R Contehttps://6364cadillac.ning.com/profile/WilliamRConte
<p>I see that I did not mention that I also had ended up with a low compression issue on several cylinders. Three of them were below 100, 1 was 89, 2 was 91, and 8 was 97.</p>
<p>I put the heads back on yesterday with the best Fel Pro gaskets I could get. I got it oiled back up with new oil and filter (break in oil used again, with WIX filter). when I did the compression test just now on the stone cold engine, all of the cylinders came up, with the exception of 7, which had 170 on compression…</p>
<p>I see that I did not mention that I also had ended up with a low compression issue on several cylinders. Three of them were below 100, 1 was 89, 2 was 91, and 8 was 97.</p>
<p>I put the heads back on yesterday with the best Fel Pro gaskets I could get. I got it oiled back up with new oil and filter (break in oil used again, with WIX filter). when I did the compression test just now on the stone cold engine, all of the cylinders came up, with the exception of 7, which had 170 on compression before, and now.</p>
<p>I am working on getting the radiator support, fan shroud, and fan back into it. I ran without them before, just the radiator sitting on the frame with a blower on it. I'm not doing that again.</p>
<p>Once it's all together the right way, I will add water and try it again. I'm not expecting to have any more issue with it.</p> Holes in heads, gaskets, and…tag:6364cadillac.ning.com,2021-04-28:6543066:Comment:2716622021-04-28T13:56:47.081ZWilliam R Contehttps://6364cadillac.ning.com/profile/WilliamRConte
<p>Holes in heads, gaskets, and block are not a 100% one for one match. Strange, but I guess that's how they are. I just got all of my gaskets, thermostat, and oil filters here yesterday afternoon. I also painted the radiator support, so I will be putting that back in before I attempt to run it again. I had to get a new heater control valve too.</p>
<p>It's going to be 82 deg here in NJ today, so I am taking my motorcycle out for a bit. After that, I'll go back to the Caddy. My plan is to clean…</p>
<p>Holes in heads, gaskets, and block are not a 100% one for one match. Strange, but I guess that's how they are. I just got all of my gaskets, thermostat, and oil filters here yesterday afternoon. I also painted the radiator support, so I will be putting that back in before I attempt to run it again. I had to get a new heater control valve too.</p>
<p>It's going to be 82 deg here in NJ today, so I am taking my motorcycle out for a bit. After that, I'll go back to the Caddy. My plan is to clean head and block mating surfaces by hand with lacquer thinner and scotch brite pads, wipe and oil the cylinders, and put the heads, water pipe, and oil filter back on, and give it a fresh oil fill with the fresh Lucas break in oil, 30 weight, as it had in it before. From there, I'll do a quick compression check to make sure that compression comes back up where it should be.</p> The closer I'm looking at the…tag:6364cadillac.ning.com,2021-04-25:6543066:Comment:2716222021-04-25T20:45:47.448ZWilliam R Contehttps://6364cadillac.ning.com/profile/WilliamRConte
<p>The closer I'm looking at the parts, the more I feel it's a head gasket issue. It won't take much to cause this, especially if it's in several spots.</p>
<p>Yes, this break in oil is expressly for this purpose. It's what the machinist gave me for it.</p>
<p>The closer I'm looking at the parts, the more I feel it's a head gasket issue. It won't take much to cause this, especially if it's in several spots.</p>
<p>Yes, this break in oil is expressly for this purpose. It's what the machinist gave me for it.</p> The water pump is a rebuilt o…tag:6364cadillac.ning.com,2021-04-25:6543066:Comment:2717122021-04-25T20:32:43.671ZWilliam R Contehttps://6364cadillac.ning.com/profile/WilliamRConte
<p>The water pump is a rebuilt original. It's working fine. I saw the water circulating on the last start, and even during the compression check, so that isn't it.</p>
<p>I pulled the pass side head off. No obvious big blowouts, but the metal around the lower outboard water ports in the head is all dark, much darker than the rest of it, and it goes right up to where the sealing ring for the cylinder is. There are no cracks that I was able to see with a strong LED work light. Cylinders look…</p>
<p>The water pump is a rebuilt original. It's working fine. I saw the water circulating on the last start, and even during the compression check, so that isn't it.</p>
<p>I pulled the pass side head off. No obvious big blowouts, but the metal around the lower outboard water ports in the head is all dark, much darker than the rest of it, and it goes right up to where the sealing ring for the cylinder is. There are no cracks that I was able to see with a strong LED work light. Cylinders look perfect.</p>
<p>I still have to pull the driver side head off. If appearances are the same on that side, or if there is just an obviously blown gasket, I am going to obtain the necessary gaskets, etc and put it back together. Oil looked as expected for break in oil. I already have another six pack of break in oil on the way here. Lucas break in oil 30 weight.</p>
<p>I'll oil the cylinders before I put the heads back, and run another compression check, and see if it comes back up, before starting it again.</p>