Exhaust manifold temp

BlueSkye
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Posts: 15
Joined: Sun Jul 20, 2014 9:38 am

Re: Exhaust manifold temp

Postby BlueSkye » Sat Jun 17, 2017 8:45 pm

Rockxx,

Mind that you read the timing at the bell housing between the engine and the transmission. Don't stick your head in front of the engine where the alternator belt is (like you would on a car). There should be a hole on top of the housing with an access cover screwed on. It's very close to where the starter motor is. Sorry if you already knew this.

I'm thinking more about burned spark plug wires if you don't have proper water to the exhaust manifold. Happened to me once.

Where are you reading the engine block temperature?

Skye
1971 32ft Express 2x318
Seneca Lake, Erie Canal, Lake Ontario, Rideau

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bill
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Joined: Sat Jul 12, 2014 7:17 am
Location: Grosse Ile MI

Re: Exhaust manifold temp

Postby bill » Sat Jun 17, 2017 10:19 pm

BigM
Come on after 91 posts :!:
A signature would be extremely helpful in this matter. :roll:
What year :?:
What engines :?:
What area of the world boat is kept :?:
Model :?:
bill
ALUMINATION
Grosse Ile MI
Located on LakeErie
37' F/B Sedan
1975
Twin 360 Chrysler Marine
Raw water cooled
Hydraulic steering both helms
USCG Master Lic. Retired

Third Owner bill

Rockxx
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Joined: Fri Mar 06, 2015 12:39 pm

Re: Exhaust manifold temp

Postby Rockxx » Sun Jun 18, 2017 5:41 pm

Skye,
Thought I remembered you could read the timing at the rear, obviously my most recent mechanic didn't. These guys today only know how to plug in their computers to tell them what's wrong. Block temp is from reading the temp gauge and reading the temp at the thermostat housing with the Lazer temp gauge.

Bill, at one time my signature was automatically added and I didn't really notice that it still wasn't. I've tried to refresh it so we'll see if it comes up after this post. I'm surprised that I've had 91 post and it's just been noticed.
Regards to all,
Rockxx
1972 28' express "Safari"
Single Chrysler 318
Center Hill Lake, Tennessee

BlueSkye
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Posts: 15
Joined: Sun Jul 20, 2014 9:38 am

Re: Exhaust manifold temp

Postby BlueSkye » Sun Jun 18, 2017 9:08 pm

Rockxx,

Your 1972 should be set up like my 1971. They changed the cooling water scheme around 1974 I have read. You should have a dual pocket water pump, four hoses. I think you can have adequate engine cooling without adequate exhaust manifold cooling if water is blocked at the transmission oil cooler. As I see it, the second pocket of the cooling water pump sends water from thermostat bleedby to pressurized tubes in the exhaust header and then on to the trans oil cooler. After the trans cooler the water gets dumped at the front of the exhaust headers to run out the exhaust. Engine cooling water gets dumped into the rear of the exhaust header and won't cool the header. I found a diagram but I don't know how to post it.

If it were me, I'd take the hose off the top of the transmission oil cooler and look down at the tubesheet. If it is full of crap the next step is obvious. If it is open then taking the hose off the discharge (top) of the second pump pocket (toward the engine) and starting the engine might be the trail to follow.

Skye
1971 32ft Express 2x318
Seneca Lake, Erie Canal, Lake Ontario, Rideau

Rockxx
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Re: Exhaust manifold temp

Postby Rockxx » Mon Jun 19, 2017 6:48 am

Skye,

We do have the same setup with the dual pocket pump. I didn't pull the hose to the transmission cooler and that is my next step to see if I have obstruction at that point. If you can tell me were you found the diagram I'll try to run it down.

Thanks for the help. I've not been much help to the forum members, seems I've got all questions and few answers.

Thanks again,

Rockxx
1972 28' express "Safari"
Single Chrysler 318
Center Hill Lake, Tennessee

BlueSkye
Member
Posts: 15
Joined: Sun Jul 20, 2014 9:38 am

Re: Exhaust manifold temp

Postby BlueSkye » Mon Jun 19, 2017 9:53 am

I've sent an email via the forum. Reply and I'll email the diagram.
1971 32ft Express 2x318
Seneca Lake, Erie Canal, Lake Ontario, Rideau

brokebill
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Posts: 17
Joined: Sun Jul 13, 2014 6:59 pm
Location: bill@erinet.com

Re: Exhaust manifold temp

Postby brokebill » Mon Jun 19, 2017 6:07 pm

Years ago I found that the assembly gaskets can be incorrectly punched out so that some water gets through but not enough, compare old gaskets with new ones.
Bill Melke
Dayton, Ohio
28' Sedan Restoration
On the hard in Constance KY.

Ray4713
New poster
Posts: 5
Joined: Mon Sep 26, 2016 10:30 am

Re: Exhaust manifold temp

Postby Ray4713 » Sat Jun 24, 2017 11:00 am

Rockxx,

Sent you another PM with the rest of the info I have
1987 32' Sedan Flybridge "Brown Eyes"
Twin Chrysler 318s
Center Hill lake, TN


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