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  • April 17, 2024, 08:28:30 PM

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Recent Posts

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1
The Engine / Re: Lifter\Camshaft Issues
« Last post by MIPS on Today at 03:22:57 PM »
The more I look at that lifter and the one sitting on my desk as a paperweight, I think what happened was the engine sat for a period with humidity in the crankcase and rust developed on the lifters. They should normally rotate while in service and looking at the galling they stopped several times and finally stopped spinning entirely and just started wearing down the lifter until it wore straight through.
I'd be concerned about how much of the filter collected the metal debris.
2
The Engine / Re: Lifter\Camshaft Issues
« Last post by vangremlin on Today at 11:36:31 AM »

The 4.0 head flows better and I think it might have larger valves. I’ve read that it’s good for 35-40hp, but it can be tricky to get the intake manifold to work.

I had a 4.0 head installed on my Kammback, along with a new cam and the Cherokee 4.0 header style exhaust manifold.  From what I recall, mounting the intake manifold wasn't a big problem, but he had to kind of rig up something to mount the power steering pump.  It does provide better performance. 
3
The Engine / Re: Lifter\Camshaft Issues
« Last post by MIPS on Yesterday at 07:37:21 PM »
Is that rust on the head of the lifter?
4
Spirit/Concord Projects / Re: AMC Sundancer 1982
« Last post by juhap on April 14, 2024, 04:14:31 PM »
Last summer I started to fix original seats.
Leather had a lot of damage. They´ve been repaired some many many years ago, and I found some leather paint too...



Frames needed cleaning and new paint. Cushions are still in good condition.



Bought a cow hyde in right color.



Co-drivers seat is leaning



There are some issues...



Oh that dirt...



Under seat everything is OK, but very dirty. I have saved some springs from previous seats jobs.
Forgot that power control unit did not work.



Power issue was fixed... wires were loose.



Drivers seat had been repaired alot, but still it needs most attention.



Someone had broken its switch. Put all parts together and... it worked as new.



Drivers seat cushion was a mess..



The other looks much better.



More issues to be fixed.



This was hiding under leather. Not so bad.



Drivers seat had a lot of rust...



Aaarrrgghh....



Have done this before, so it was an easy job. Now there is something that AMC forgot... primer.



After a days job, they all were in good condition. Just one spring replaced.



Driverseat needed a lot of attention...
Springs first. And then I fixed ends of those wires. Replaced rotten carboard twine by rubber tube...



New material...



And more... hog rings secured cushion.



And more new material.



Then it was time to remove those 4 door seats...and rotten original carpet.



Carpet was dry, but shot.



Under carper it was dry too, but there has been water...  >:D



Found the first hole... there has been a screw and rusted through...



Found more pinholes... that 2x4 beam is under there...
Added some phosporic acid to remove test of rust...



The other side had marks of that 2x4 beam too. Welding had left some burnt paint and surface rust.  :'(

Once the jack has pushed floor up...  :censored:



And after that this stopped. I could´t by any carpet material from finnish suppliers! Lower edges of front seats need Saddle color cutpile carpet.
And Auto Custom Carpet didn´t sell any if you don´t order it with a precut carpet! So... what to do? It was about christmas time, when I ordered a new carpet to my AMC Matador Coupe from ACC. And with that I could buy a piece of right material. So far, so good. My friend had a car coming to Finland, so this carpet and much more stuff began to float across the bond to us... Now that container is in Bremenhaven, Germany. We had a stike here in Finland, so containers stopped there... Do not know when I´ll get my stuff...

But Now back to the business... I had a new carpet. So today it was time to do something about that...

Made a piece of new sound mat.



Rear seat first. Found missing plugs from my parts Hornet. Painted that floor a couple of weeks ago...



New material here.



New carpet is a little curvy... It was out of its package for six months...



I had to put those 4 door Concord seats back...



And after few hours of labour, job is done.



To be continued... soon, I hope...
5
The Engine / Re: Lifter\Camshaft Issues
« Last post by 89 MJ on April 14, 2024, 12:57:45 PM »
thank you for the input, why the 4.0 head?

Henry

The 4.0 head flows better and I think it might have larger valves. I’ve read that it’s good for 35-40hp, but it can be tricky to get the intake manifold to work.
6
The Engine / Re: Lifter\Camshaft Issues
« Last post by win32exe on April 14, 2024, 09:27:58 AM »
thank you for the input, why the 4.0 head?

Henry
7
The Engine / Re: Lifter\Camshaft Issues
« Last post by 89 MJ on April 13, 2024, 10:44:33 PM »
I’m actually in a similar boat with my car, but I haven’t had any failures yet. For what it’s worth, here is my plan: new cam, lifters, timing set, and a 4.0 head.

To see if a valve is stuck, you should be able to push on the valve end of the rocker arm or tap it with a rubber mallet. If it doesn’t move and sounds solid, it’s stuck. If it moves and sounds kind of hollow almost, the valve is still functioning as intended.
8
The Engine / Lifter\Camshaft Issues
« Last post by win32exe on April 13, 2024, 11:06:46 AM »
Hi Team, My SX/4 had been recently been making a slight tapping sound and i figured it was the lifters getting tired and had planned on swapping them out soon, then driving on the highway recently this happened, (see picture) she started popping\knocking out of the carb, the #6 exhaust valve was not opening anymore, limped it off the highway and towed her home, took it apart and found the one bad lifter.


so i have a few questions...

How does the lifter get worn like that? the pushrod isn't bent, the lifter came out as easy as the rest, it wasn't stuck in the block, could it be a stuck valve, the valve looks good to the eye, seats flat, no visual bending.

Does that mean the camshaft definitely needs to be replaced?

If so what else should i do, new timing chain and gears? pushrods? rocker arms? Are these used OE parts on the engine better than replacements?

why do all the parts needs to go back to the exact position, pushrods, rockers, lifters in relation to replacing all the lifters or pushrods and\or rockers etc, none of the parts will be in the original positions, lets say two pushrods are bent, would we replace the whole set? i understand if the old parts are going back in then put them in the original position.

Head and pistons don't look too bad, but should i just drop a reman 4.0 Liter in?

I feel like i am at a crossroads

Any input is appreciated.

Henry

9
Off topic / Re: Retaining and Gaining Members and Moderation Help
« Last post by 89 MJ on April 10, 2024, 12:04:37 PM »

Just checking in, did you receive my PM?

I did, sorry I've been out of town for the last week.  I'll send a response today.

No worries, it was just the first PM I’ve sent here. Wanted to make sure it work alright haha
10
Off topic / Re: Retaining and Gaining Members and Moderation Help
« Last post by vangremlin on April 10, 2024, 11:31:19 AM »

Just checking in, did you receive my PM?

I did, sorry I've been out of town for the last week.  I'll send a response today.
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