Got a pretty good picture of the lobe.
![Camera lens Flash photography Lens Cameras & optics Circle]()
1 - 20 of 23 Posts
Fingernail is barely catching right at the edges I've circled. I believe that's at the tip of the nose, It's smooth everywhere else. It looks like pitting down the center in some spots, but it's smooth to the touch. This is my daily driver now, so it being down a week while I wait for a camshaft to be shipped would not be ideal. Of course, catastrophic engine failure wouldn't be ideal, either. 😂
![Automotive lighting Flash photography Fixture Circle Auto part]()
Shoebox has an excellent cam change guide:
How are the lifters?
Good LT1 reference:
How are the lifters?
Good LT1 reference:
How to Rebuild Small-Block Chevy Lt1/Lt4 Engines Hp1393: Mavrigian, Mike: 0075478003938: Amazon.com: Books
How to Rebuild Small-Block Chevy Lt1/Lt4 Engines Hp1393 [Mavrigian, Mike] on Amazon.com. *FREE* shipping on qualifying offers. How to Rebuild Small-Block Chevy Lt1/Lt4 Engines Hp1393
www.amazon.com
Progress. Rad fans and rad out of the way. air pump and water pump removed. New pushrods on the way. They're Melling MPR-615 standard replacements.
The rocker arms on here put on by the previous owner are Comp Cams full rockers, 1.6 ratio. Thinking about going with a full set since a few of these are showing wear on the spot where the arms meet the PRs. All the Jegs and Summit Racing recs do not show full RRs when I put in my engine into the search parameters, just rockers with the roller tips. I'm not even sure if the previous owner replaced the springs. 190k miles though, and I know I put 115k of those miles on it myself, so replace the springs regardless?
Any budget-friendly recommendations on the rockers / valve springs? I like the idea of 1.6 ratio full roller rockers on an OEM replacement cam. New valve lifters are US made LS7's out of the same factory the AC Delcos are made out of. Thanks
EDIT: Forget the springs. I just talked to my brother and removing those is more than we're capable of in the garage at my house.
![]()
The rocker arms on here put on by the previous owner are Comp Cams full rockers, 1.6 ratio. Thinking about going with a full set since a few of these are showing wear on the spot where the arms meet the PRs. All the Jegs and Summit Racing recs do not show full RRs when I put in my engine into the search parameters, just rockers with the roller tips. I'm not even sure if the previous owner replaced the springs. 190k miles though, and I know I put 115k of those miles on it myself, so replace the springs regardless?
Any budget-friendly recommendations on the rockers / valve springs? I like the idea of 1.6 ratio full roller rockers on an OEM replacement cam. New valve lifters are US made LS7's out of the same factory the AC Delcos are made out of. Thanks
EDIT: Forget the springs. I just talked to my brother and removing those is more than we're capable of in the garage at my house.
Rocker arm ratio can affect push rod length. Might want to pick up a pushrod length checker to optimize roller contact pattern on valve stem.
There are full roller rockers out there. They just have to be “narrow body” small block Chevy to fit under the center bolt valve covers. I used Comp Cams Ultra Pro-Magnums:
www.compcams.com
Those are for 7/16” studs. They also make them for stock 3/8” studs. And they are non-self aligning, so you need guide plates.
There are full roller rockers out there. They just have to be “narrow body” small block Chevy to fit under the center bolt valve covers. I used Comp Cams Ultra Pro-Magnums:
Ultra Pro Magnum Roller Rocker Arms: Chevy; 7/16" Stud, 1.6 Ratio-1
COMP Cams® Rockers
www.compcams.com
Those are for 7/16” studs. They also make them for stock 3/8” studs. And they are non-self aligning, so you need guide plates.
Break in procedure - roller lifters:
help.summitracing.com
You might want to check Melling to see if they have a recommendation.
How do I break in my roller camshaft and lifters?
help.summitracing.com
You might want to check Melling to see if they have a recommendation.
I think the previous owner slapped in Comp Cams 1302's, or something very close. They're def 1.6 Comp Cams, and the 1302's look identical, right down to the CC stamp, except the bottom of the body where the roller tip is comes to a point, where the 1302's seem to be rounded off in the pics I've found online. I don't know if the design was modified slightly at one point or if I'm off on the part number.Rocker arm ratio can affect push rod length. Might want to pick up a pushrod length checker to optimize roller contact pattern on valve stem.
There are full roller rockers out there. They just have to be “narrow body” small block Chevy to fit under the center bolt valve covers. I used Comp Cams Ultra Pro-Magnums:
Ultra Pro Magnum Roller Rocker Arms: Chevy; 7/16" Stud, 1.6 Ratio-1
COMP Cams® Rockers
Those are for 7/16” studs. They also make them for stock 3/8” studs. And they are non-self aligning, so you need guide plates.
As far as the pushrod length, the stock 7.2" have been fine for the 115K+ miles I've driven it until the noisy lifter issue arose, so I don't see that as suddenly becoming an issue if I go with the same/similar setup. LS7's are supposedly the OEM replacement for stock now, and these aren't the Chinese knock-off LS7's. For sure I'm looking to replace these CC rockers with the newer equivalent model if I can't find old stock on the ones already in the car. Thanks!
Could be wrong but I thought I saw guide plates were already in there? I'll double-check.
BTW, saw you sold your '94 mean green machine. Watched the videos. That thing could smoke some tires like mine never could, haha!
Pic of the CC roller rockers previously installed:
It's a hydraulic cam and not flat-tappet, so far as I understand, but I've read those can also benefit from a break-in procedure. I didn't find any info for the specific cam I ordered on Melling's site outside general specs, but maybe I was looking in the wrong spot? I guess I'll find out if it comes with break-in procedure instructions when it arrives on Friday. Hoping to get my baby back on the road by Saturday afternoon at the latest. Already have a lot of info printed out and ready in-hand when re-installing so no dicking around with finding that info as things are getting put back together.Break in procedure - roller lifters:
How do I break in my roller camshaft and lifters?
You might want to check Melling to see if they have a recommendation.
I'd love the Pro Mags but a little out of my price range after spending so much on everything else. Looking at the CC 17002-16's high energy aluminums. Good choice for a daily driver, or those aren't narrow body and won't fit... Also, double-checked and the previous owner did not install guide plates so I'll have to get those ordered up and installed if I'm going NSA.Rocker arm ratio can affect push rod length. Might want to pick up a pushrod length checker to optimize roller contact pattern on valve stem.
There are full roller rockers out there. They just have to be “narrow body” small block Chevy to fit under the center bolt valve covers. I used Comp Cams Ultra Pro-Magnums:
Ultra Pro Magnum Roller Rocker Arms: Chevy; 7/16" Stud, 1.6 Ratio-1
COMP Cams® Rockers
Those are for 7/16” studs. They also make them for stock 3/8” studs. And they are non-self aligning, so you need guide plates.
Got the new camshaft in today. Methodically putting things back together and noticed some wear patterns on the water pump drive shaft. You can see it visually and feel the wear with a finger. I have a new seal, but will this wear cause leaking issues regardless, or is this normal wear? I'm seeing GM part # 10219554, but google results show a lot of used ones on ebay for sale with the same wear pattern. Trying to find new or aftermarket in case I need to replace it.
![]()
1 - 20 of 23 Posts
