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With the intake off, you would be hard pressed to tell if the engine was a 4.6 or 5.4. They look identical without the intake to the naked eye. I can only tell the 5.4 from the 4.6 by the EGR valve and what fitting is on the left exhaust manifold. If it's male to male it's the 4.6 and male to female, 5.4
Agreed , with the intake off. Correct on the EGR (top and bottom) ....the 4six has a tiny one, - too small and plugs everything up. IAC valve is in a totally different location on the 4sixes as well...
Yes, KR's are 5four....I had Heritage on the brain.
I'm not reading the description like you are....your probably right. On the fence here tho, need more/better info.
With the intake off, you would be hard pressed to tell if the engine was a 4.6 or 5.4. They look identical without the intake to the naked eye. I can only tell the 5.4 from the 4.6 by the EGR valve and what fitting is on the left exhaust manifold. If it's male to male it's the 4.6 and male to female, 5.4
I knew they're similar but didn't realize they were this similar. Aside from that though my thoughts were about how a bolt would get from sitting on top of an intake to the inside of a cylinder. The 4.6 intake is a two piece so the bolt would have to make it through the lower intake or get dropped from two intake halves. doubtful. With the 5.4 and the deep plenum the mechanic would almost have to do something they wouldn't do. Turn the intake on its side and allow anything on the intake to fall in to the heads. A competent mechanic would be careful not to do that. Usually everything is stuffed and covered with rags before any work is done. And once back together there is no way a mechanic would not know something was wrong from the racket the bolt would make. Although a mechanic may not know exactly what happened or why, they would know why there's no compression in cylinder 6. Something was in the engine. Like I said back in #12, there has to be more to this story then we've heard so far. It doesn't add up.
Rivers......forget the intake. If the mechanic took it off, a bolt could easily drop into one of the cylinder head holes and never be seen on a modular. With the ports straight up, it's easy to lose something in there.
Last edited by akdoggie; Sep 11, 2020 at 09:30 PM.
I get that AK. I'm just following the story from the beginning. It ends with the mechanic starting the engine and there's no compression in #6 cylinder and the mechanic told him he didn't know why. I don't buy it. He would have known something was wrong real fast and would have shut the engine down. Also if it's as easy as you say why wouldn't a mechanic take a minute and hit the ports with a magnet or scope? I'm not a mechanic and I would and this would be a good example for why. As White says, hit and run and we're never going to get the full story to this.
I get that AK. I'm just following the story from the beginning. It ends with the mechanic starting the engine and there's no compression in #6 cylinder and the mechanic told him he didn't know why. I don't buy it. He would have known something was wrong real fast and would have shut the engine down. Also if it's as easy as you say why wouldn't a mechanic take a minute and hit the ports with a magnet or scope? I'm not a mechanic and I would and this would be a good example for why. As White says, hit and run and we're never going to get the full story to this.
You are suppose to double check before installing anything. Like a carpenter, measure twice, cut once. LOL. I do at least. Bolts or nuts are nasty to engines.
I always tape ports or stuff them with paper towels... and they get vacuumed out too. In this pic you can see that I left my oil pump priming tool in it to also keep crap out of the dizzy hole. That's a rough one to get stuff out of.
I'm guessing when the mechanic put the engine back together he was missing a bolt. Fired it up and the engine found the bolt. Must of made a hell of racket. The engine cover bolt is no small bolt.... to get past the valves anyway. It's short, but they're 10mm hex. I guess if it broke the valve (valves usually bend and break in halves at the top when this occurs) , it could of fell into the cylinder.
