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⚙️ Upgrade your engine tuning game with precision springs that pros swear by!
COMP Cams 4758-2 Checking Springs are a pair of low tension, 3-inch steel springs designed for precise measurement tasks like piston-to-valve clearance, rocker ratio, and cam degreeing. Easy to install by hand, these springs are a must-have for professional engine builders and enthusiasts aiming for flawless performance tuning.
| ASIN | B000CIO9W0 |
| Best Sellers Rank | #73,001 in Automotive ( See Top 100 in Automotive ) #4 in Automotive Replacement Engine Valve Springs |
| Brand | Comp Cams |
| Customer Reviews | 4.8 4.8 out of 5 stars (556) |
| Date First Available | November 23, 2005 |
| Exterior | Per Item Description |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.317 ounces |
| Item model number | 4758-2 |
| Manufacturer | COMP Cams |
| Manufacturer Part Number | 4758-2 |
| Model | JEGS |
| OEM Part Number | 4758-2 |
| Product Dimensions | 3.2 x 4 x 0.5 inches |
J**Y
just what i needed to measure for pushrod length
just what i needed to measure for pushrod length on my sbc 350
P**B
Worked for LQ9
Worked for my cam swap and checking pushrod length.
C**G
They work!
Item as described and came in very quickly. It was packaged well and it's a must have to check PtV clearances when dropping a high performance cam in your engine build. Always check PtV clearance or you will be sorry!
C**E
They worked, BUT read all of this review, there is much more to this story
I installed the checking springs to test the valve to seat seal after a machinist, Mike Schultz of Thumper Heads fit new valves and machined the valve seats to fit them The seats leaked right away. I had a second machinist look at the seats and valves and he said it was the worst valve job he has ever seen. There was no contact for about 1/3 distance around the seat. The seat was ruined by Mike Schultz because of his machine work, allegedly. The newly machined seats were not concentric. Now I have to buy new valve seats and machine the seats again. The cost will be about $600 more. Mike Schultz of Thumper Heads, ruined my engine head, allegedly. Originally, I chose Mike Schultz over many other machinists because I believed his self promotion and his promotion by Chris of autoxcooper. Man, was i fooled. Bottom line is that I donated $1,700.00 to Mike Schultz of Thumper Heads of FL so that he could ruin my engine, allegedly. How naive I was. Now I have to spend an additional $600 to repair Thumper Head's work. Good luck on your own engine build.
J**S
Fast
Product just as described. Worked perfectly.
2**1
works, had to cut off a couple coils for wide guide boss base
I had to cut off a couple coils, these do not clear the wide guide boss bases on vortec heads so they end up sitting on the shoulder. to get full valve movement I had to cut off the bottom couple of coils. Once done, they worked. for something bosses with smaller ID than the springs these would work pretty well. used for checking retainer to guide clearance and degreeing cam.
P**S
Very good tool to have
Very nice tool to have for dialing in pushrod engines. I am very glad I bought this.
R**.
They work great!
They work fine for checking piston-to-valve clearance.
H**N
A must tool for checking valve to piston clearance and pushrod length, Thank you
T**D
Super great quality worked perfect for my 1969 Pontiac Lemans rebuild
D**Y
Didn’t gEt a chance to use yet but they should be fine for checking valve clearance I was inpatient did it a different way but have for next time I build a motor my bad ENGINE lol
D**D
works great
T**H
makes checking valve to piston clearance easy. Easy to install and easy to use.
Trustpilot
1 month ago
3 weeks ago