C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

valve covers

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Old Apr 26, 2013 | 11:03 PM
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I just got an 85 that I am trying to clean up. For the most part the engine compartment looks really clean. But the aluminum valve covers make the rest of the engine look like trash, becasue the paint is peeling the medallion is missing and for some reason they are a battleship grey. I purchased some new chrome covers to set off the engine compartment. Now after looking at the manual though it seems I have to dismantle most of the engine to replace them. One thing as a newbie I am having a hard time understanding is why I need to remove the exhaust manifold on the right side to get the cover above it off. Something doesn't make sense. Anyone out there tried to do this and have a simpler way?
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Old Apr 26, 2013 | 11:38 PM
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I have an 85 and I have found it pretty easy to pull them . On the drivers side take the cap off of the wiper motor. I use a sideways ratchet screwdriver set that I got from Lowe's for the the 3 torx screws. There will be a few vacuum hoses to move, no big deal. On the passenger side move the hoses in the front that are in way and it's no big deal. The emblems are available on ebay, that's where I got mine.

http://www.ebay.com/itm/1985-1990-Corvette-Valve-Cover-Emblem-/350748700297?pt=Motors_Car_Truck_Parts_Accessories&fits=Year%3A1985%7CModel%3ACorvette&hash=item51aa406e89&vxp=mtr
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Old Apr 27, 2013 | 03:06 AM
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Originally Posted by rangerman55
I just got an 85 that I am trying to clean up. For the most part the engine compartment looks really clean. But the aluminum valve covers make the rest of the engine look like trash, becasue the paint is peeling the medallion is missing and for some reason they are a battleship grey. I purchased some new chrome covers to set off the engine compartment. Now after looking at the manual though it seems I have to dismantle most of the engine to replace them. One thing as a newbie I am having a hard time understanding is why I need to remove the exhaust manifold on the right side to get the cover above it off. Something doesn't make sense. Anyone out there tried to do this and have a simpler way?
i've done it several times on my 85. never heard of taking the exhaust manifold off, either side, to remove the valve covers. where are you getting that information?
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Old Apr 27, 2013 | 03:40 AM
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I don't think you need remove the exhaust manifold, only the EGR tube that runs from the exhaust manifold over the VC to the intake base. Here I suggest you spray the EGR tube bolts with PB Blaster the night before you begin work on them.
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Old Apr 27, 2013 | 07:33 AM
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I was reading from the Chiltons manual. Thought, you got to be kidding! I've worked on restoring three autombiles now, a 66 Lemans, 65 Dodge dart and an 83 Jeep. Not like I am new to the field. But this was just so out in left field, thought I would ask before getting invovlved.
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Old Apr 27, 2013 | 09:34 AM
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There is no EGR tube on the 85. The passenger side comes off rather easy. The driver's side can be a PITA. I have never played with the wiper motor, I have always removed the serp belt, loosened the alternator and swung it out of the way and then removed the air pump.

You DO NOT HAVE TO REMOVE THE EXHAUST MANIFOLD.
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Old Apr 27, 2013 | 08:58 PM
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Originally Posted by rangerman55
I was reading from the Chiltons manual. Thought, you got to be kidding! I've worked on restoring three autombiles now, a 66 Lemans, 65 Dodge dart and an 83 Jeep. Not like I am new to the field. But this was just so out in left field, thought I would ask before getting invovlved.
Stop reading the chitlins manual first of all...thats a joke with no punch line.

get a FSM set if you want REAL facts and GM detailed info.

Second..the valve covers are NOT aluminum. They were magnesium and they ALL turned brown the 1st time they got wet. Mag does that when hot.
next...IF you have an EGR pipe,. go to a muffler shot and they will have the tool to reclamp the tube or they can weld a flange like the other end has. Pull tube, other misc things in the way..lift cover off. Rt side is def easier. Do not pinch wires when resetting covers. Wiper motor removal makes rt side even easier.
Loose the $19 generic book. Its useless as lips on a wood pecker. The GM fsm set will cost $75 or more but its like paint by numbers..cannot screw up with the FSM set.
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Old Apr 27, 2013 | 10:57 PM
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you don't have to remove the wiper motor, just the circuit board cap. It's just 3 screws and a couple of wires to unplug. It takes only a few minutes.
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Old Apr 27, 2013 | 11:19 PM
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Originally Posted by leesvet
Stop reading the chitlins manual first of all...thats a joke with no punch line.

get a FSM set if you want REAL facts and GM detailed info.

Second..the valve covers are NOT aluminum. They were magnesium and they ALL turned brown the 1st time they got wet. Mag does that when hot.
next...IF you have an EGR pipe,. go to a muffler shot and they will have the tool to reclamp the tube or they can weld a flange like the other end has. Pull tube, other misc things in the way..lift cover off. Rt side is def easier. Do not pinch wires when resetting covers. Wiper motor removal makes rt side even easier.
Loose the $19 generic book. Its useless as lips on a wood pecker. The GM fsm set will cost $75 or more but its like paint by numbers..cannot screw up with the FSM set.
HA, I never knew that, I always wondered why they turned color for all these years...
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Old Apr 28, 2013 | 10:58 AM
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Originally Posted by leesvet
Stop reading the chitlins manual first of all...thats a joke with no punch line.

get a FSM set if you want REAL facts and GM detailed info.

Second..the valve covers are NOT aluminum. They were magnesium and they ALL turned brown the 1st time they got wet. Mag does that when hot.
next...IF you have an EGR pipe,. go to a muffler shot and they will have the tool to reclamp the tube or they can weld a flange like the other end has. Pull tube, other misc things in the way..lift cover off. Rt side is def easier. Do not pinch wires when resetting covers. Wiper motor removal makes rt side even easier.
Loose the $19 generic book. Its useless as lips on a wood pecker. The GM fsm set will cost $75 or more but its like paint by numbers..cannot screw up with the FSM set.
I paid around $20-$30 for a cd version of the manual and many other things that came with it. If I need something then I can just printout the page or look back at the computer real quick. And it's REALLY EASY to use thankfully!
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Old Apr 28, 2013 | 11:38 AM
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From: It's Bad Ass in Black! Cape Coral, Florida
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Originally Posted by John A. Marker
There is no EGR tube on the 85. The passenger side comes off rather easy. The driver's side can be a PITA. I have never played with the wiper motor, I have always removed the serp belt, loosened the alternator and swung it out of the way and then removed the air pump.

You DO NOT HAVE TO REMOVE THE EXHAUST MANIFOLD.
This is what I did this week on my 85. I used gaskets from FelPro, #VS12869T. $30 bucks but worth it. I did not use their washers, I used the originals. They are rigid enough to just set on engine, then put valve cover on. It says on gaskets which is bottom side, toward the lifters. Put on dry and use a torque wrench if possible, 50psi....

Last edited by thecatmac; Apr 28, 2013 at 11:41 AM.
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Old Apr 28, 2013 | 12:31 PM
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Originally Posted by thecatmac
This is what I did this week on my 85. I used gaskets from FelPro, #VS12869T. $30 bucks but worth it. I did not use their washers, I used the originals. They are rigid enough to just set on engine, then put valve cover on. It says on gaskets which is bottom side, toward the lifters. Put on dry and use a torque wrench if possible, 50psi....
I sure hope you don't try 50 PSI
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Old Apr 28, 2013 | 02:08 PM
  #13  
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Originally Posted by Cruisinfanatic
I sure hope you don't try 50 PSI
My mistake, I went 15ft lbs....spec is 17ft lbs...
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Old Apr 28, 2013 | 02:46 PM
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Originally Posted by thecatmac
My mistake, I went 15ft lbs....spec is 17ft lbs...
spec on early C4 is 50 in lbs
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Old Apr 28, 2013 | 06:04 PM
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From: It's Bad Ass in Black! Cape Coral, Florida
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Originally Posted by Cruisinfanatic
spec on early C4 is 50 in lbs
You are correct..thanks...
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