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11-22-2015, 09:27 AM
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#1
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Senior Member
City: Blaine
Vessel Name: Slow Bells
Vessel Model: Marine Trader 38
Join Date: Nov 2013
Posts: 327
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question about my 135hp Ford
I'm trying to learn a little about the engines on my new boat. I have taken a few pictures of a fitting on my boat's 135 hp Ford engines (1987). I have no idea what it is. It is on the front of the engine near what I assume is the fresh water pump. I notice that when I turn the nut on the cap fitting, the bolt turns as well. What's up with that? Should I be alarmed? Should I ask for a refund? Nothing is leaking from the fitting, but I'm still curious.
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11-22-2015, 09:53 AM
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#2
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TF Site Team
City: Jacksonville
Join Date: Nov 2008
Posts: 11,683
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I believe the nut you are turning is the tightening nut on an expansion plug. We have a rubber boot with a hose clamp that serves the same purpose. Call American Diesel and get the correct fitting/cap/boot would be my suggestion. It's an off the shelf item.
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11-22-2015, 09:59 AM
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#3
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Senior Member
City: Anacortes
Vessel Name: Selah
Vessel Model: Ocean Alexander 40
Join Date: Dec 2011
Posts: 315
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It may be an internal expansion plug like a rubber garboard plug. Some 135s have external caps over that fitting, I think is's just a left-over feature from the engine's truck motor origin. That would have been the inlet to the water pump from the lower radiator hose.
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11-22-2015, 11:10 AM
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#4
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Guru
City: North Vancouver
Vessel Name: Phoenix Hunter
Vessel Model: Kadey Krogen 42 (1985)
Join Date: Apr 2011
Posts: 2,877
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Yes. I have a rubber boot as well. Call American Diesel and see if this needs to be replaced.
http://americandieselcorp.com
Jim
Sent from my iPad using Trawler Forum
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11-22-2015, 11:15 AM
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#5
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Guru
City: Bethlehem, PA
Vessel Name: Lady Kay V
Vessel Model: 1978 Hatteras 53MY
Join Date: Oct 2015
Posts: 1,098
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Quote:
Originally Posted by JDCAVE
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Where is the raw water pump on your engine? Or is that the raw water pump under the pully, in which case the question is where is the fresh water pump?
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11-22-2015, 11:25 AM
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#6
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Guru
City: Sidney
Join Date: Feb 2015
Posts: 2,258
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Larry; what does the other end of your belt tensioner look like?
You make it or acquire it?
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11-22-2015, 11:33 AM
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#7
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Veteran Member
Join Date: Oct 2007
Posts: 48
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That rubber expansion plug is a common plumbing fitting used to temporarily or long term plug up various pipes. During the last conversation with Bob Smith that I had about this fitting many years ago he said that they were now recommending the expansion plug as being a more robust answer to blocking that unused pipe than the rubber boot that had been used earlier.
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11-22-2015, 11:43 AM
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#8
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Guru
City: Brookline, NH
Vessel Name: Shalloway
Vessel Model: Defever 44, twin Perkins
Join Date: Sep 2013
Posts: 2,260
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What you have is a rubber expansion plug that blocks off the unused part of the coolant circulation pump. According to American Diesel it is the PREFERRED WAY to close off this port because it is much more reliable than the "cap". Plus when the cap fails it usually does so suddenly and the coolant empties very quickly. I replaced my original "caps" with the plugs and I can say that the end of the old style cap is very thin.
Ken
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11-22-2015, 12:14 PM
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#9
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Guru
City: North Vancouver
Vessel Name: Phoenix Hunter
Vessel Model: Kadey Krogen 42 (1985)
Join Date: Apr 2011
Posts: 2,877
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Quote:
Originally Posted by kchace
What you have is a rubber expansion plug that blocks off the unused part of the coolant circulation pump. According to American Diesel it is the PREFERRED WAY to close off this port because it is much more reliable than the "cap". Plus when the cap fails it usually does so suddenly and the coolant empties very quickly. I replaced my original "caps" with the plugs and I can say that the end of the old style cap is very thin.
Ken
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That is good advice. I'll look into that. I have to replace the oil coolers this year and inspect the heat exchanger so will probably replace the coolant at the same time. That would be a good time to replace the end cap.
Jim
Sent from my iPad using Trawler Forum
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11-22-2015, 01:06 PM
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#10
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Guru
City: Sarasota/Ft. Lauderdale
Join Date: Apr 2014
Posts: 5,438
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Quote:
Originally Posted by Hawgwash
Larry; what does the other end of your belt tensioner look like?
You make it or acquire it?
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Looks like he got smart and changed his tensioner over to a turnbuckle.
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11-22-2015, 01:26 PM
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#11
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Enigma
City: Slicker?
Join Date: Oct 2007
Posts: 16,567
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Greetings,
Why not keep the cap and put a rubber plug over it? Belt and suspenders. I'd try Lowes or Home Despot for a generic rubber cap.
__________________
RTF
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11-22-2015, 01:33 PM
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#12
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Guru
City: Bethlehem, PA
Vessel Name: Lady Kay V
Vessel Model: 1978 Hatteras 53MY
Join Date: Oct 2015
Posts: 1,098
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Actually, in this case how about the internal AND an external cap? Redundancy?
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11-22-2015, 02:00 PM
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#13
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Guru
City: Vero Beach, FL.
Vessel Name: FIREFLY
Vessel Model: Pilgrim 40
Join Date: Nov 2012
Posts: 918
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Question well covered and answered correctly, nothing to add but y'all have a great day!
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11-22-2015, 02:45 PM
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#14
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TF Site Team
City: Jacksonville
Join Date: Nov 2008
Posts: 11,683
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Quote:
Originally Posted by Hawgwash
Larry; what does the other end of your belt tensioner look like?
You make it or acquire it?
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Old school from my sailing days. The turnbuckle ends are called an aircraft or compression fork or jaw to jaw. You have to watch the cooling fin clearance on the alternator against the turnbuckle. Ted on OC Diver has a new school set up on his refit which is definitely worth a look.
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11-22-2015, 05:42 PM
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#15
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Guru
City: Sidney
Join Date: Feb 2015
Posts: 2,258
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Quote:
Originally Posted by Larry M
You have to watch the cooling fin clearance on the alternator against the turnbuckle.
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Thanks Larry, the clearance was what I was wondering about.
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11-22-2015, 05:54 PM
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#16
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TF Site Team
City: Jacksonville
Join Date: Nov 2008
Posts: 11,683
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Quote:
Originally Posted by Hawgwash
Thanks Larry, the clearance was what I was wondering about.
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The turnbuckle is shorter than the standard bracket which means a smaller belt which got the tab on the alternator higher and closer to the engine.
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11-22-2015, 08:48 PM
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#17
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Guru
City: Bethlehem, PA
Vessel Name: Lady Kay V
Vessel Model: 1978 Hatteras 53MY
Join Date: Oct 2015
Posts: 1,098
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Ooooooohhhhh I LIKE that!
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