Plastic Valve Cover hold down broke - JeepForum.com

 
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post #1 of 11 Old 09-01-2009, 07:36 PM Thread Starter
rcawrse
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Plastic Valve Cover hold down broke

Hi guys,

One of the black washers that hold down the plastic valve cover on 85 CJ7 4.2L 6 broke off. Any idea where to get a replacement piece? I am assuming it is a washer but could be called something else.

Thanks,
Rob

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post #2 of 11 Old 09-01-2009, 07:50 PM
spittoon
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the washer broke before the plastic did? thats odd. if you get desperate, i just put on a new plastic cover and have a couple of extra nut/washer combos i could drop in an envelope to you..
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post #3 of 11 Old 09-02-2009, 01:08 AM
carnuck
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Or get an aluminum replacement and call it good! (I did mine)
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post #4 of 11 Old 09-02-2009, 06:24 AM
Mike Romain
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I am wondering what part you are looking for...

Do you mean those donut shaped washers that go on the rocker bridge bolts under the valve cover? If so, they come with a new valve cover gasket.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
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post #5 of 11 Old 09-02-2009, 09:27 AM Thread Starter
rcawrse
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The washers go on the outside over what I assume is the engine block head bolt to hould down the valve cover.
I have an aluminum valve cover on it already, but have not tapped the two holes on the driver side. Would that be a better way to go?

-Rob
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post #6 of 11 Old 09-02-2009, 01:54 PM
Mike Romain
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Ah, the big washer that is part of the nut that goes on the head bolt. I think I would just use a thick metal washer the right diameter under the nut instead and be very careful how tight I made it. I think loctite is needed on those, they always back off loose.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
Some Canadian Bush Jeep Runs and Build Photos: http://mikeromainjeeptrips.shutterfly.com (10 new albums added Sept 16/10)
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post #7 of 11 Old 09-02-2009, 02:11 PM Thread Starter
rcawrse
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I'll give it a shot. Thanks.
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post #8 of 11 Old 09-08-2009, 01:36 PM Thread Starter
rcawrse
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Turns out when I took off the aluminium valave cover a chunk from the front broke off. I assume this means the bolts were too tight?
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post #9 of 11 Old 09-08-2009, 01:40 PM
JoonHoss
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sounds like it. I would order a new (aluminum) cover, and tap/thread/install it the correct way.

Hoss

"Genius may have its limitations, but stupidity is not thus handicapped."
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post #10 of 11 Old 09-14-2009, 07:21 PM Thread Starter
rcawrse
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any special tool to keep the drill straight when drilling any recommendations? what is the compression and our performance improvement with going to an aluminium valve cover?

The other issue is that the back bolt is basically impossible to get on being so close to the fire wall.

Any thoughts or how have you guys tightened that sucker down?

Thanks,
Rob
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post #11 of 11 Old 09-14-2009, 07:27 PM
fish1erp
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Quote:
Originally Posted by rcawrse View Post
what is the compression and our performance improvement with going to an aluminium valve cover?
Rob
Hopefully none.

It's purely decorative, but functional by keeping the oil in the upper end of the motor and not down the sides of the block

Full-time Firefighter/Paramedic. IAFF Local 2915
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