broken heat xchanger outlets - pic added.....

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stiffler4444
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broken heat xchanger outlets - pic added.....

Post by stiffler4444 » Tue Apr 24, 2018 6:10 am

Hi all,

Was cruising through the search options, but not finding what I need. My heat exchanger connections to the muffler have both snapped. Any tips or tricks anyone has used to repair this particular area? I'm considering the cheap flex material used to repair exhaust leaks, but that is usually very temporary. Not crazy about buying a new exchanger either.....

Thanks in advance. I can get pics tonight if anyone is interested.

Dave
Last edited by stiffler4444 on Tue Apr 24, 2018 11:44 am, edited 2 times in total.
1972 710m

stiffler4444
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Re: Broken connection from Xchanger to muffler

Post by stiffler4444 » Tue Apr 24, 2018 11:43 am

exchanger flange break.jpg
exchanger flange break.jpg (197.43 KiB) Viewed 883 times
1972 710m

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rmel
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Re: broken heat xchanger outlets - pic added.....

Post by rmel » Tue Apr 24, 2018 1:21 pm

Not a lot of meat there to work with :(

Might be time for a replacement and while
your at it a new SS Muffler. Even if the metal
was not rusted and solid, that looks like a
fatigue crack not sure you can weld or braze to
that with confidence :?
Puller: 71' 710K 2.7L EFI aka Mozo
Follower: Sankey MK 3, 3/4 Tonne
Rescue Pinz: 73' 712M

Driver: Ron // KO0Q

stiffler4444
Canada
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Re: broken heat xchanger outlets - pic added.....

Post by stiffler4444 » Tue Apr 24, 2018 1:43 pm

rmel wrote:
Tue Apr 24, 2018 1:21 pm
Not a lot of meat there to work with :(

Might be time for a replacement and while
your at it a new SS Muffler. Even if the metal
was not rusted and solid, that looks like a
fatigue crack not sure you can weld or braze to
that with confidence :?
Ya, I'm going to pull it all apart and see what the condition is of the surrounding steel. There is definitely not enough to band it in any way now that I look at the photo up close. ://
1972 710m

whitesik
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Re: broken heat xchanger outlets - pic added.....

Post by whitesik » Tue Apr 24, 2018 2:43 pm

I am going outside my expertise a bit but I have had one of those exchangers torn apart. Perhaps if you could find a pipe whose OD is close to the old ID, one could weld that to the relatively beefy flange then insert into the old pipe to clamp. Actually you could take the pipe all the way to the front flange. that would ensure no leaks elsewhere for exhaust fumes to enter the cabin ventilation.
Attachments
heatexchanger2.jpg
heatexchanger2.jpg (137.05 KiB) Viewed 868 times
heatexchanger1.jpg
heatexchanger1.jpg (133.69 KiB) Viewed 868 times
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rmel
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Re: broken heat xchanger outlets - pic added.....

Post by rmel » Tue Apr 24, 2018 3:05 pm

Interesting! For future reference were you able to reassemble with no issues?
Puller: 71' 710K 2.7L EFI aka Mozo
Follower: Sankey MK 3, 3/4 Tonne
Rescue Pinz: 73' 712M

Driver: Ron // KO0Q

stiffler4444
Canada
Posts: 776
Joined: Mon Mar 15, 2010 1:46 pm
Location: Crystal Beach ON CAN

Re: broken heat xchanger outlets - pic added.....

Post by stiffler4444 » Tue Apr 24, 2018 3:30 pm

whitesik wrote:
Tue Apr 24, 2018 2:43 pm
I am going outside my expertise a bit but I have had one of those exchangers torn apart. Perhaps if you could find a pipe whose OD is close to the old ID, one could weld that to the relatively beefy flange then insert into the old pipe to clamp. Actually you could take the pipe all the way to the front flange. that would ensure no leaks elsewhere for exhaust fumes to enter the cabin ventilation.
Nice, thanks for the thoughts and info.
1972 710m

whitesik
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Re: broken heat xchanger outlets - pic added.....

Post by whitesik » Tue Apr 24, 2018 3:34 pm

Yes, I took it apart because of significant rust on one side. Although I could not find a good or new exchanger then, I was able to find the half shell that I needed. I cut it apart, cleaned and media blasted it and a friend help to weld the shell back on. The internal fins are cast aluminum around the pipes.
Attachments
heatexchanger5.jpg
heatexchanger5.jpg (124.34 KiB) Viewed 862 times
heatexchanger3.jpg
heatexchanger3.jpg (151.82 KiB) Viewed 862 times
heatexchanger7.jpg
heatexchanger7.jpg (129.97 KiB) Viewed 862 times
heatexchanger4.jpg
heatexchanger4.jpg (103.4 KiB) Viewed 862 times
heatexchanger6.jpg
heatexchanger6.jpg (115.78 KiB) Viewed 862 times
75 Swiss 710K
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rmel
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Re: broken heat xchanger outlets - pic added.....

Post by rmel » Tue Apr 24, 2018 3:39 pm

Well that makes it a lot more feasible to repair as a lot more pipe is exposed to work with.
But that's some welding skills I don't have :wink: so I'd be apt to just get a decent replacement.
Puller: 71' 710K 2.7L EFI aka Mozo
Follower: Sankey MK 3, 3/4 Tonne
Rescue Pinz: 73' 712M

Driver: Ron // KO0Q

whitesik
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Re: broken heat xchanger outlets - pic added.....

Post by whitesik » Tue Apr 24, 2018 4:35 pm

As an alternative, I think this is still available but not for sure.

viewtopic.php?f=5&t=11162
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pcolette
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Re: broken heat xchanger outlets - pic added.....

Post by pcolette » Wed Apr 25, 2018 1:17 pm

I have a set of the pipes from inside a heat exchanger with the flanges welded on and in good condition. The shell had rusted out and the aluminum fins were bad so were removed. I made a temorary bracket to help support the pipes from the original heat exchanger mount above.
IMG_4296.jpg
IMG_4296.jpg (306.97 KiB) Viewed 831 times
IMG_4298.jpg
IMG_4298.jpg (304.44 KiB) Viewed 831 times
IMG_4300.jpg
IMG_4300.jpg (168.42 KiB) Viewed 831 times
IMG_4301.jpg
IMG_4301.jpg (329.43 KiB) Viewed 831 times



I'd be willing to sell it if this would help you out.
Paul C.
_________
'73 Swiss 710M
'89 Puch 230GE
2002 MB G500 (For Sale)

stiffler4444
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Re: broken heat xchanger outlets - pic added.....

Post by stiffler4444 » Thu Apr 26, 2018 10:11 am

pcolette wrote:
Wed Apr 25, 2018 1:17 pm
I have a set of the pipes from inside a heat exchanger with the flanges welded on and in good condition. The shell had rusted out and the aluminum fins were bad so were removed. I made a temorary bracket to help support the pipes from the original heat exchanger mount above.
IMG_4296.jpg
IMG_4298.jpg
IMG_4300.jpg
IMG_4301.jpg




I'd be willing to sell it if this would help you out.
Thanks Paul. We will see what happens when I take it off this weekend. I may be in touch......
1972 710m

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