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Just Bought 88 Mustang gt 5.0
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<blockquote data-quote="FISHTAIL" data-source="post: 15018440" data-attributes="member: 19212"><p>Not sure if anyone has done a writeup on valve cover gaskets that I've ever seen. It's not a difficult job, but if they are leaking badly it's likely that your PCV valve needs to be replaced. I forget which year ford switched to the steel/rubber valve cover gasket arrangement, but I've never had an issue with them. If your car doesn't have those, order a set from LMR. </p><p></p><p>As far as taking them off, you'll need to remove the upper intake manifold first. This is not a difficult job. There are 6 bolts holding that on, two up front by the distributor, two in the back near the fuel pressure regulator and the vacuum T, then two longer bolts under the plate. To remove the upper, take the two (12mm?) bolts out of the throttle cable linkage plate that bolts to the EGR spacer after you've popped the cables off the TB, and set it aside. Unplug the EGR harness, TPS harness and IAC, pull the breather hose out of the TB, and clamp/remove the small EGR coolant hoses. Unhook the PCV hose from the rear of the intake, along with the feed to the main vacuum tee on the firewall, and the other two small vacuum lines on either side of it. You'll also need to unhook the vacuum line that runs around the front of the intake to the evap canister mounted on the front passenger frame rail. Then take the 6 bolts out and remove the upper intake. You now have access to the valve covers. This sounds like a ton of work when typing it out, but it's not..the job takes 20 minutes.</p><p></p><p>The issue your having at night is the alternator. The stock alternators are barely sufficent in terms of output, especially at idle. Things are slowing because your basically running off the battery. Upgrade to a 3G alternator and never worry about it again. LMR sells a kit for this upgrade that makes it easy. you'll need a dremel, and about 2 hours.</p></blockquote><p></p>
[QUOTE="FISHTAIL, post: 15018440, member: 19212"] Not sure if anyone has done a writeup on valve cover gaskets that I've ever seen. It's not a difficult job, but if they are leaking badly it's likely that your PCV valve needs to be replaced. I forget which year ford switched to the steel/rubber valve cover gasket arrangement, but I've never had an issue with them. If your car doesn't have those, order a set from LMR. As far as taking them off, you'll need to remove the upper intake manifold first. This is not a difficult job. There are 6 bolts holding that on, two up front by the distributor, two in the back near the fuel pressure regulator and the vacuum T, then two longer bolts under the plate. To remove the upper, take the two (12mm?) bolts out of the throttle cable linkage plate that bolts to the EGR spacer after you've popped the cables off the TB, and set it aside. Unplug the EGR harness, TPS harness and IAC, pull the breather hose out of the TB, and clamp/remove the small EGR coolant hoses. Unhook the PCV hose from the rear of the intake, along with the feed to the main vacuum tee on the firewall, and the other two small vacuum lines on either side of it. You'll also need to unhook the vacuum line that runs around the front of the intake to the evap canister mounted on the front passenger frame rail. Then take the 6 bolts out and remove the upper intake. You now have access to the valve covers. This sounds like a ton of work when typing it out, but it's not..the job takes 20 minutes. The issue your having at night is the alternator. The stock alternators are barely sufficent in terms of output, especially at idle. Things are slowing because your basically running off the battery. Upgrade to a 3G alternator and never worry about it again. LMR sells a kit for this upgrade that makes it easy. you'll need a dremel, and about 2 hours. [/QUOTE]
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