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Discussion Topic:
39 Mercury ticking noise only when accelerating
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TomO |
05-25-2021 @ 8:41 PM
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Senior
Posts: 7250
Joined: Oct 2009
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That could be the source of your noise, put your hand carefully near the pipe and have an assistant rev the engine. You should feel exhaust gasses if that is leaking
Tom
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39mercury |
05-26-2021 @ 8:06 AM
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Member
Posts: 47
Joined: Mar 2011
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I think it is as well. Good idea for testing the leak. I should have some time and an assistant this weekend to help me check it out. I will report back my results. Any thoughts on if I should install a set of Headers? I have a Mitch*ll overdrive that I bought for it 8 years ago as well and I plan on installing it in the future. I ordered it with the separate stick for engagement rather than the switch. Having second thoughts about another shifter on the floor, but it seemed to be the best choice since I have elected to keep it as original with 6V electronics but I would like to improve the performance at 55-65 without taxing the Flathead. Thanks, Steve
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carcrazy |
05-26-2021 @ 10:51 AM
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Senior
Posts: 1651
Joined: Oct 2009
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If you do install headers, the best ones to use are the Fenton Cast Iron Headers. They are as durable as the stock exhaust manifolds but flow much better. The under hood noise with these cast iron headers is much less than with typical sheet metal headers. Have the headers installed by a competent exhaust shop that is capable of bending and fabricating the exhaust pipes so they will clear the clutch system and other under the car items for best results and minimum aggravation.
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TomO |
05-26-2021 @ 6:11 PM
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Senior
Posts: 7250
Joined: Oct 2009
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I have Fenten headers on my 40 Merc. They look nice, but are a pain to install and I had to modify the dipstick tube to make the headers fit. I did not notice any improved performance or change in gas mileage after I installed them. I would just stick with the stock manifolds. I personally do not like the Mitch*ll over drive. It requires too many modifications to install. I have been driving my 40 Merc with the stock 3.54:1 rear end, at 55 mph for over 50 years and only had problems when I drove at slow speeds in hilly country, then I had to use a lower gear than I would have normally chosen. Tom
This message was edited by TomO on 5-26-21 @ 6:11 PM
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sarahcecelia |
05-28-2021 @ 4:44 AM
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Senior
Posts: 1182
Joined: Mar 2013
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Whomever did that welding did a very poor job! That is your problem with the "ticking." Good welding is not a series of "blobs; it is a series of overlapping welds all in a row." Go to a good pro welding shop and look at some of their welds- You'll see what I'm talking about!
Regards, Steve Lee
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sarahcecelia |
05-28-2021 @ 4:48 AM
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Senior
Posts: 1182
Joined: Mar 2013
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Those welds are terrible! Go to a pro welding shop and look at their welds!
Regards, Steve Lee
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39mercury |
06-03-2021 @ 7:03 PM
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Member
Posts: 47
Joined: Mar 2011
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Thanks for your honesty Steve! Those welds are bad. I think that since I’m driving it more often I am noticing what still needs fixed. I have a friend lined up to fix them. I also noticed the oil was down a quart when I drove it last week so maybe the oil I added will also help.
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