🔍 Measure with Confidence: Elevate your engine's performance!
The COMP Cams 4758-2 Checking Springs are a set of two low tension springs designed for easy installation and precise measurement of piston-to-valve clearance, rocker ratios, and cam degreeing. Weighing just 0.704 ounces and measuring 3.2 x 4 x 0.5 inches, these springs are a reliable addition to any performance enthusiast's toolkit.
| Manufacturer | COMP Cams |
| Brand | Comp Cams |
| Item Weight | 0.704 ounces |
| Product Dimensions | 3.2 x 4 x 0.5 inches |
| Item model number | 4758-2 |
| Is Discontinued By Manufacturer | No |
| Manufacturer Part Number | 4758-2 |
| OEM Part Number | 4758-2 |
C**Y
As expected
Worked well with my AFR heads
P**S
Very good tool to have
Very nice tool to have for dialing in pushrod engines. I am very glad I bought this.
S**E
Works well, good value, quick delivery.
They were easy to use, fuctioned well.
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
100%
Great product worked great measuring piston to valve clearance.
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.
O**T
They work.
Low tension springs for mocking up valvetrain, checking worst case piston to valve clearance (except radial), and holding valves in place when regular valve springs are removed.
V**R
Excellent quality, and low price.
These are quality test springs that will last forever.
T**D
Perfect
Super great quality worked perfect for my 1969 Pontiac Lemans rebuild
D**D
happy with it
works great
D**Y
Look great
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
T**H
not expensive and they work
makes checking valve to piston clearance easy. Easy to install and easy to use.
G**.
Make sure you order these with your Push Rod Measuring Tool...
Using these springs will ensure you do not bend your new Push Rod Measuring Tool...
Trustpilot
5 days ago
2 weeks ago