| What am I missing here? [message #328816] |
Sat, 03 February 2018 20:41  |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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1978 Eleganza w/ 403 engine. I am trying to replace the fuel pump. I looked at the new pump but on the installed one I can not see the the top mounting bolt area. There is a slot in the top mounting area that looks like it was designed to start the bolt and slide the pump under the head. I tried to reverse that procedure removing it and was unsuccessful. I ended up removing both bolts and now I can pull the pump about 1 to 1.5 inches out. Then it hits an AC mounting casting above it. I can not get it to clear the casting.
I know is is a simple job because I watched Al Branscome change a pump on his in about 30 minutes at Bean Station.
I gave up for the night and came home. I was 28 degree when I left. When I came home I looked in the 1977-78 maintenance supplement and all it says under fuel pump is "Correct as Necessary"
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
[Updated on: Sun, 04 February 2018 11:43] Report message to a moderator |
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| Re: What am I missing here? [message #328819 is a reply to message #328816] |
Sat, 03 February 2018 21:15  |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Ken, you might be on the high part of the cam lobe. Try bumping engine a little and See if it will come out. I was thinking the slot was for a stud and a nut.
Ken Burton wrote on Sat, 03 February 2018 21:411978 Eleganza w/ 403 engine. I am trying to replace the fuel pump. I looked at the new one and feel but con not see the the top mounting bolt area. There is a slot in the mounting area the looks like it was designed to start the bolt and slide the pump under the head. I tried to reverse that procedure removing it and was unsuccessful. I ended up removing both bolts and now I can pull the pump about 1 to 1.5 inches out and then it hits an AC mounting casting above it. I can not get it to clear the casting.
I know is is a simple job because I watched Al Branscome change a pump on his in about 30 minutes at Bean Station.
I gave up for the night and cme home. I was 28 degree when I left. When I came home I looked in the 1977-78 maintenance supplement and all it say under fuel pump is "Correct as Necessary"
C. Boyd
76 Crestmont
East Tennessee
[Updated on: Sat, 03 February 2018 21:17] Report message to a moderator |
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| Re: [GMCnet] What am I missing here? [message #328821 is a reply to message #328816] |
Sat, 03 February 2018 21:53 |
Len Novak
Messages: 676
Registered: February 2004
Location: Las Vegas, NV
Karma: -3
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I'm thinking you are high on the lobe. It does slide under the slot under
head of the pump. Kind of interesting to remove the pump as our
granddaughter went under the coach to remove the pump from the bottom.
I'm not going to tell you how long it took her to complete that job.
Len and Pat Novak
1978 GMC Kingsley
The Beast II with dash lights that work and labels you can see!
Fallbrook, CA new email: B52Rule@Roadrunner.Com
http://www.gmcmhphotos.com/photos/showgallery.php?cat=4375
www.bdub.net/novak/
-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Ken
Burton
Sent: Saturday, February 03, 2018 6:41 PM
To: gmclist@list.gmcnet.org
Subject: [GMCnet] What am I missing here?
1978 Eleganza w/ 403 engine. I am trying to replace the fuel pump. I
looked at the new one and feel but con not see the the top mounting bolt
area.
There is a slot in the mounting area the looks like it was designed to
start the bolt and slide the pump under the head. I tried to reverse that
procedure removing it and was unsuccessful. I ended up removing both bolts
and now I can pull the pump about 1 to 1.5 inches out and then it hits an
AC mounting casting above it. I can not get it to clear the casting.
I know is is a simple job because I watched Al Branscome change a pump on
his in about 30 minutes at Bean Station.
I gave up for the night and cme home. I was 28 degree when I left. When I
came home I looked in the 1977-78 maintenance supplement and all it say
under fuel pump is "Correct as Necessary"
--
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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Len and Pat Novak
1978 GMC Kingsley
The Beast II with dash lights that work and labels you can see!
Las Vegas, NV new email: B52sRule@Gmail.com
http://www.gmcmhphotos.com/photos/showgallery.php?cat=4375
www.bdub.net/novak/
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| Re: What am I missing here? [message #328823 is a reply to message #328819] |
Sun, 04 February 2018 00:48 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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Thanks Len,
I think I'll try that. I was cold so I just quit and came home to get warm. I was thinking I would find something in the manual when I got here.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: What am I missing here? [message #328826 is a reply to message #328825] |
Sun, 04 February 2018 08:54 |
Bullitthead
Messages: 1411
Registered: November 2013
Karma: 5
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If the rotational position of the cam is hindering the removal, then all you will have to do is overcome the spring in the fuel pump arm to get it out. If overcoming the spring will not gain enough clearance, then something must be wrong somewhere in the bracketry or the pump arm or the cam drive.
Terry Kelpien
ASE Master Technician
73 Glacier 260
Smithfield, Va.
[Updated on: Sun, 04 February 2018 08:55] Report message to a moderator |
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| Re: What am I missing here? [message #328829 is a reply to message #328826] |
Sun, 04 February 2018 11:51 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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Actually the opposite is happening. With the pump all the way down. The arm is hitting the upper part of the hole in the block so the pump will not go low enough to clear the AC mount.
You just gave me an idea that I did not try. When I go back I will push the pump all the way up and see I can get it to clear the AC bracket that way.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] What am I missing here? [message #328846 is a reply to message #328837] |
Sun, 04 February 2018 19:49 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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Thanks Len. I think I am OK. I'll try a couple of things and see what happens. I have the new pump So i know exactly what it looks like. I think I did not try enough combinations to get it out. Let see what happens. If it does not come out I'll be back.
Thanks again to everyone for the help.
If it does not come out, I'll just have to get a bigger hammer or bigger pry bar.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: What am I missing here? [message #328853 is a reply to message #328816] |
Mon, 05 February 2018 09:22 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Total guess but I bet you need to be on low part of eccentric AND overcome some arm spring tension. Otherwise it would be slack on the low part and Clack Clack Clack
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: What am I missing here? [message #328900 is a reply to message #328816] |
Tue, 06 February 2018 21:48 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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Well I went out to the coach tonight and froze. In the process I followed Jim Hupy's suggestion of rotating the pump slightly counter clockwise and it came right out. I did not install the new one yet because I need to clean up where the gasket goes on the block and I was cold. So maybe tomorrow I'll do that before our Pilot's Club meeting. It was 16 degrees where I was working so 30 minutes is about as long as I wanted to put up with that.
Chuck, You stated that the upper bolt as a stud. Well tonight I looked closely at the removed bolt and it was indeed a stud and a nut rust frozen together. I haven't decided if I'll separate them and install them as a stud and nut again or if I'll just reinstall the frozen pieces as a bolt.
Thanks everyone for your suggestions.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: What am I missing here? [message #328903 is a reply to message #328816] |
Tue, 06 February 2018 22:11 |
Wackster
Messages: 49
Registered: November 2017
Location: Baltimore
Karma: 0
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That frozen stud/nut bolt sounds like the perfect candidate for the acetone/transmission fluid penetrating brew I've rad so much about in this forum!
Jim Wack - 1976 23' Crestmont
Baltimore, Maryland
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| Re: What am I missing here? [message #328908 is a reply to message #328903] |
Tue, 06 February 2018 23:33 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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Yes it is but I'm not wanting to wait for it. So if I decide to do it I'll heat it with a torch, twist it off, and replace the nut with a new one. Then reassemble with thread locker on the engine end and anti-seize on the nut end.
I am very familiar with acetone and PSF or ATF. I used it on this engine to free up rings rusted to the cylinder walls. It took 3 weeks to get all 8 of them loose. The engine now just purrs but still has a few problems. I start it without even setting the choke with the throttle pedal. I can reach up to the steering wheel and turn the key while standing in the center isle and it fires off and runs. I wish my coach did this. I'm working right now on a fuel pump leaking gas into the crank case and also a stuck open thermostat.
I am in the process of flushing the engine with 5w20 and Rislone. Currently it is holding 40 PSI at an idle even with the 2 quarts or so of gasoline mixed in with the oil. Once I run it up to temperature that oil will be dumped and replaced with 5w30 and Rislone. Then we will do it all over again. Depending on how that looks, we will next run Deluo / Delvac 15W40 for about 500 miles.
This is all subject to change depending on how the oil looks on each draining. The reason 5w20 and 5W30 is the current cold temperatures. We want the cold oil to flow immediately and to flush quickly even when cold. Oil pressure is continuously monitored through all of this.
This 78 coach was parked unused for 19 years.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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