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

mod the vavlecovers.

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Old Mar 23, 2003 | 01:18 AM
  #1  
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Default mod the vavlecovers.

Did you have to mode the stock l98 vavle covers alot when you whent to 1,6 rr? And what material did you have to remove?

Thanks
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Old Mar 23, 2003 | 01:24 AM
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Default Re: mod the vavlecovers. (devilfish)

Hmm, good guestion? I had to grind the boasters in my 1992 Lt1. I cannot recall if the L98 has these pieces inside the valve cover :nonod:
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Old Mar 23, 2003 | 02:44 AM
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Default Re: mod the vavlecovers. (devilfish)

Yes you have to cut off the drip tabs. you need to cut them flat.
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Old Mar 23, 2003 | 04:17 AM
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Default Re: mod the vavlecovers. (devilfish)

I had to grind down the dip tabs and narrow the bolt towers to clear my 1.6:1 ProMagnums.
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Old Mar 23, 2003 | 07:41 AM
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Default Re: mod the vavlecovers. (65Z01)

how much material did you have to remove from the bolt towers?
and did you have to remove the dip tabs, or just grind them down?

thanks
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Old Mar 23, 2003 | 08:39 AM
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Default Re: mod the vavlecovers. (devilfish)

Check out this link, it's a step by step on how to remove the drip tabs. Basically, you just score them at the base with a dremel, then snap them off with a pair of pliers. Use heavy duty cutoff wheels on your dremel and a pair of safety glasses.........one of the pics shows why you want to wear the glasses :eek:
http://briefcase.yahoo.com/bc/cabobo...r+Mods&.view=l

I'll modify the towers if I have to after I test fit the valve covers. Good luck :cheers:
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Old Mar 23, 2003 | 11:15 AM
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Default Re: mod the vavlecovers. (devilfish)

I ground the drip tabs off completely but that may not be necessary; try to leave a little bit of each tab.

For the bolt towers, I estimated how high the RRs would rise on them and ground off a little from each side of each tower till the covers fit with no interference.

Some guys have to pinch the lower edges of the oil shields to avoid hitting the RRs; I used a pair of plyers to squeeze them in a little too.

My engine was in the car and it was very difficult to get the valve covers installed over the RRs so I took one additional precaution. Before firing up the engine I installed the valve covers, pulled the fuel injector fuses & disconnected the distributor; then I cranked the engine to be sure the RRs weren't hitting anything inside the valve covers.
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