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I'm buttoning up a cam/head/exhaust swap on my 03 convertible and have run across a clearance issue putting the alternator back on. Using the valve covers from the 243 heads I bought, the mounts are a little lower than the ls1 valve covers. I guess I could put the LS1 back on..... don't want to tackle relocation right now. Anyone else run into this and have a clever solution? LS1 valve cover 243 Valve Cover
Last edited by drummer0901; Jan 30, 2025 at 10:00 PM.
Reason: misspelling
No, the whole coil bracket is 1" or 2 lower, and the rear of the altenator hits the #1 coil pack
It would help if you posted a picture of the drivers valve cover with the same complete view as the top picture.
Where did the new valve covers come from? Why did you not just use the LS1 valve covers? What relocation?
Last edited by lucky131969; Jan 31, 2025 at 08:12 AM.
It would help if you posted a picture of the drivers valve cover with the same complete view as the top picture.
Where did the new valve covers come from? Why did you not just use the LS1 valve covers? What relocation?
the early 97-98 LS1 engines have heads with perimeter bolts for the valve covers.
I was trying to keep the 243 valve covers with the 243 heads, it looks like the most economical solution is to use 1 241 cover (driver) and 1 243 cover (passenger)
Here is requested pic of the same perspective, along with the 2 valve covers side by side. No the valve cover is not upside down, nor do I want to grind away at something that should fit. Now should I plug the large pvc hole or tie it to the passenger valve cover and throttle body for the clean side? Top valve cover is from the 243 heads, bottom is original 241
Not sure, I think a Malibu SS, not sure what year. I tried to use the original LS1, but the baffles on the passenger side would not fit with the BTR trunion upgrade. I later knocked them out before discovering the LS6 valley mod with my catch can. So rather than replacting the original PCV system and a valve cover (with baffles) I did the LS6 valley mod. I think it will look cleaner too
In my .02, if the original LS1 covers cleared this same alternator, just run them. Simple solution. No point in . When buying used heads with a pair of used covers, who knows what heads the covers came off. It looks like the bosses that the coil packs bolt to are taller on one cover than the other. Hard to tell at this point. They are obviously cast in different locations. If you really must try the "243" covers (IF that's what they are), check the part# on them, and see if they are in fact for 243 heads. I'm guessing they are not. Best of luck to you....
No idea. That "LS6" valve cover boss configuration is unlike any I have seen for any LS1, 2, 6....including LQ4 and LQ9 configurations. Even the PCV barb connection is unique.
There should be a part number cast into the inside of the valve cover. Take a pic of that please.
I believe that is a later valve cover off something other than a C5 Corvette, the surface the valve cover seals against is the same across the cathedral port heads excluding the early perimeter bolts obviously.
I didn't know the bosses for the coil bracket changed with the valve cover but, the factory covers off your 241s will work.
The PCV valve became integrated into the valve cover later on.
No idea. That "LS6" valve cover boss configuration is unlike any I have seen for any LS1, 2, 6....including LQ4 and LQ9 configurations. Even the PCV barb connection is unique.
There should be a part number cast into the inside of the valve cover. Take a pic of that please.
The covers on my LS7 have that same PVC metal barb. However, they were purchased used at a performance shop (now LPE, Wixom, Michigan), that was big on GM parts, and are GM covers. So I don't know what they are from. But I have no fitment issues with my alternator on my 2000 C5. But then again, they're C5 coil packs and are mounted on an LS7 block and heads. It is very tight for clearance between the coil pack and alternator. In fact, I have to loosen the alternator and remove the Serpentine belt to remove the coil pack. But there's no interference......
I believe that is a later valve cover off something other than a C5 Corvette, the surface the valve cover seals against is the same across the cathedral port heads excluding the early perimeter bolts obviously.
I didn't know the bosses for the coil bracket changed with the valve cover but, the factory covers off your 241s will work.
The PCV valve became integrated into the valve cover later on.
243 Head swap/ Alternator Clearance
. When buying used heads with a pair of used covers, who knows what heads the covers came off. It looks like the bosses that the coil packs bolt to are taller on one cover than the other. Hard to tell at this point. They are obviously cast in different locations. If you really must try the "243" covers (IF that's what they are), check the part# on them, and see if they are in fact for 243 heads. I'm guessing they are not. Best of luck to you....
