ak diesel driver
6.5 driver
I guess someone else will benefit from 3bals efforts/money.
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Header exhaust leaks
- Thread starter 3bals
- Start date
MrMarty51
Well-Known Member
Those gaskets, from the pic. appear to be a little thicker than the felPro.
MrMarty51
Well-Known Member
Thats good to know.
Thought about a Motorhome on the last outing and then read this. I'll stick to the 5er. My pickups give me enough trouble as it is.
Seriously I would hunt for anything else close to the exhaust and make sure it's wrapped with header wrap.
It's not all the motorhome or the 6.5 fault, most of my troubles boil down to poor workmanship and the rest are just bad luck. Yes, when I get it back home I will fabricate heat shields and use exhaust wrap where I can.
This popped up on my fb from a year ago today. This was in Pittsburg, PA.
Husker6.5
135' diagonal 16:9HD, 25KW sound!
Now THAT'S a flange!
Well, here's what I got from Peninsular today.
I'm not sure if I understand what they are going to do.
"Jody, we believe we have found the problem. Over the years the cylinder heads have been produce by different foundries and each time there are slight changes in casting and machining. Why I wanted the picture was to see which heads you have. Basically what is going on is the area that is machined for the exhaust manifold to seal too is smaller and the flange of the exhaust manifold is not quite sealing because of interference with parts of the casting mold seam (where the two halves of the mold come together). So when you used silicon or a gasket it would seal at first and then blow out as the bolts worked loose from the heating and cooling cycles. The fab shop is going to make sure that you have the clearance that you need.
Thanks,
Mitch"
Oh and I've been dealing with Mitch because Matt is having some sort of medical issue.
I'm not sure if I understand what they are going to do.
"Jody, we believe we have found the problem. Over the years the cylinder heads have been produce by different foundries and each time there are slight changes in casting and machining. Why I wanted the picture was to see which heads you have. Basically what is going on is the area that is machined for the exhaust manifold to seal too is smaller and the flange of the exhaust manifold is not quite sealing because of interference with parts of the casting mold seam (where the two halves of the mold come together). So when you used silicon or a gasket it would seal at first and then blow out as the bolts worked loose from the heating and cooling cycles. The fab shop is going to make sure that you have the clearance that you need.
Thanks,
Mitch"
Oh and I've been dealing with Mitch because Matt is having some sort of medical issue.
I know what is going on but I will not go their in your thread as I have already said BOTH of them flat out lied to me in regards to a set of P400 heads, at that time I had already cut a P400 head apart and I knew more about them than they did and they attempted to say their wasn't any difference in any of the heads and as I have shown in my past threads & pics that isn't the case, they are totally behind with this new motor in every way...
I knew they were going to blame something else other than themselves, they always do because very few are able to prove them wrong and the average person doesn't know the difference so it works for them ...
I'm sorry I'm not 100% setup in my shop yet, I could have designed a better mannie I think....
Hope it all works out and this fixes it, I will like to see if it does....
Jody, they are going to grind your flanges where they say they are touching on your heads on the part that isn't machined flat...
BIGR
Lucky To Be Here
I hated a header leak with a passion, I put headers on an early 1970's Pontiac that I had. I had the 350 engine built and the transmission rebuilt with a shift kit. Yea I know it was a gas engine, but a header leak sucks for sure. I soaked the header gasket in the dang bath tub, then installed it. I think and after that it did ok, except I had to recheck the dang header bolts every so often, they were bad to work loose on the drivers side.
That was the wilder younger days, the things that I could tell you about the car and the experiences I had....
All that came to a end on a Friday Night in 1983. A young lad in a 1970's model Ford truck decided he wanted to total it out by hitting me in the A@$ End while he was running 45 MPH Plus, while I was stopped. OH law, him and his two buddies wanted to just leave the scene of the collision, I was hot as a firecracker since they had just tore my car all to H#@L. I threatened to whip everyone of them, they calmed down pretty quick and the police finally showed up Back then seatbelts were not required, I was not wearing one. I had a friend with me he was all freaked out, we had a severe whiplash for sure. It broke my seat, I was practically was reclined back in the back seat after impact, the seats were non reclining bucket seats. My drivers door would not open I crawled out the drivers door window.
What a heck of a Friday night that was for sure BACK IN 1983.
That was the wilder younger days, the things that I could tell you about the car and the experiences I had....
All that came to a end on a Friday Night in 1983. A young lad in a 1970's model Ford truck decided he wanted to total it out by hitting me in the A@$ End while he was running 45 MPH Plus, while I was stopped. OH law, him and his two buddies wanted to just leave the scene of the collision, I was hot as a firecracker since they had just tore my car all to H#@L. I threatened to whip everyone of them, they calmed down pretty quick and the police finally showed up Back then seatbelts were not required, I was not wearing one. I had a friend with me he was all freaked out, we had a severe whiplash for sure. It broke my seat, I was practically was reclined back in the back seat after impact, the seats were non reclining bucket seats. My drivers door would not open I crawled out the drivers door window.
What a heck of a Friday night that was for sure BACK IN 1983.
MrMarty51
Well-Known Member
WOW Big R, what an experience. Hope nobody here ever has to go through one of them wrecks.
BIGR
Lucky To Be Here
Didn't mean to get off topic, there was another rear end collision (40 MPH plus) in 1989, I was in. Was wearing a seatbelt that time, just a sore shoulder. Been lucky the rest of the time, I was a high speed driver in my profession for years, luckily I never crashed at triple digit speeds. I think back at some of things I did and it kind of scares me to think about it now. The GOOD LORD was with me is all I can say.
Back to the header gaskets, I hope it works out.
On Tuesday of this week I received the "repaired" headers. No new flanges, just cleaned up a little, the bolt holes enlarged, the corners ground off and the welds that my machinist milled off repaired. I took them to the rv shop with the Remflex gaskets to be installed. Neither the rv tech or myself have much confidence in the fix, but we'll see.
I can't help but say this..... that's just wrong.... I can't believe they get away with what they do, junk yard work at best..
And what if their shady repair doesn't cure the leaking, what will they do then..
And what if their shady repair doesn't cure the leaking, what will they do then..
And another observation it doesn't look like they are tig welded, it may be but doesn't look like it , makes me wonder just what they were thinking
ak diesel driver
6.5 driver
Looks like they cleaned up the mating surface with a hand held grinder. I'd check it for flatness
A solid one piece flange would work much much better, but would require some machining to clear the head in places..
And a 90* weld fitting would provide much better flow than what they made..
A much better header "could" have been made, sure it would have cost more to produce but it would have been much better and this thread wouldn't have been here for anyone to read...
Jody, I have a p400 here and another will be here in a couple of weeks, down the road if you get fed up with Mitch & Matt as I predict you will I'll make you a set that will be much better than the crap you were sold....
Chris
And a 90* weld fitting would provide much better flow than what they made..
A much better header "could" have been made, sure it would have cost more to produce but it would have been much better and this thread wouldn't have been here for anyone to read...
Jody, I have a p400 here and another will be here in a couple of weeks, down the road if you get fed up with Mitch & Matt as I predict you will I'll make you a set that will be much better than the crap you were sold....
Chris
Husker6.5
135' diagonal 16:9HD, 25KW sound!
Making the bolt holes bigger was the WORST thing they could have done to those flanges, as now there will be even less contact area under the bolt heads, which means a much greater chance of losing clamping pressure (and possibly blowing out another gasket) or of the bolt head gouging/distorting the area around the hole. Now you will HAVE to use a washer under the bolts.
Well, there's not much I can do, except put it together with the parts I have. Other than redesigning the whole exhaust system and start over. I don't think there is enough money in my pension to do that.
I'm hoping the new gaskets will make things better, as their claim says.
I remember when I took the motorhome back to the shop after the weekend trip to Lincoln, we were able to stick a feeler gauge in between the header and the head surface where the high temp RTV blew out. Now that indicates the header wasn't tight against the head, even though the bolts were still torqued. It was originally thought that the headers were warped, but what might have been happening was the headers were hanging up on the mating surface as the boys in MI thought. If that was the case, the combination of the new clearance, the better gaskets and the locking bolts, could be the fix.
I'm hoping the new gaskets will make things better, as their claim says.
I remember when I took the motorhome back to the shop after the weekend trip to Lincoln, we were able to stick a feeler gauge in between the header and the head surface where the high temp RTV blew out. Now that indicates the header wasn't tight against the head, even though the bolts were still torqued. It was originally thought that the headers were warped, but what might have been happening was the headers were hanging up on the mating surface as the boys in MI thought. If that was the case, the combination of the new clearance, the better gaskets and the locking bolts, could be the fix.