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Rocker Arm Remover/Installer & Valve Spring Compressor Tool, 3.7L & 4.7L Engines
OPTION 1: Used as Rocker Arm Remover/Installer
OPTION 2:Used as Valve Spring Compressor Tool
Jason
2025-08-31 20:30:15
I just finished replacing my lifters. This tool works fantastic! If you run out of talent and forget to rotate the engine to free the pressure and then try compressing the spring this tool can break which inspires some folks to write a bad review. It doesnt take much effort to pop the rockers off.
Radcliffe David
2025-08-26 17:12:21
I replaced the lifters on our 2000 Jeep Grand Cherokee, 4.7L. This tool was absolutely neccessary to accomplish said task. I know many people say to molest a thin head 10mm wrench and pry the rockers out, then 'tap' or pry them back into place. For less than $30, you can do the job correctly with this tool. I did have to remove some of the back side of the section where the ratchet attaches, with a hand grinder. It wanted to cintact the fuel rail, and with that being said, you will want to use the smallest head 3/8 ratchet/breaker bar available, as the larger headed tool will also contact the fuel rail. A large box end wrench on the breaker bar can provide the needed leverage to replace the rockers if working solo.I found it was not neccessary to find exact TDC. As long as the cam lobe is not down on the rocker, the valve will compress and the rocker will slide out. Just work which ones have the lobe raised, document them as you go, then cycle the engine by hand just enough to get to the next several lifters.My original lifters had nearly 140k miles and every one was seized. I soaked the new ones (Melling) in half 5w30 oil and half Lucas oil stabilizer overnight. Huge improvement, I had no idea how bad the originals had become.Recommendations-Definitely replace the valve cover gaskets, if not the valve covers themselves. 20+ year old plastic, one of mine cracked upon removal. A gasket set should include the oil fill spout to cylinder head gasket, new cover and gasket set probably won't include that gasket.Heater hoses. Again 20+ years old. They will be coming off anyway. Mopar originals and even aftermarket hoses are ridiculously expensive. HPS silicon hoses were much more reasonable and fit perfectly.Radiator hoses. Gonna be draining coolant anyway, why not? Interesting note, both radiator hoses differ from 99 & 2000 vs. 01 - 04. The heater hoses are the same for all years of WJ's, at least with the 4.7L. HPS only offered radiator hoses for the 01 - 04 models, and their heater hoses specify 01- 04, but fit perfectly in the 2000.Serpentine belt. Again, will have the old one off, slide a new one in there and toss the old one in the cab as a spare.Fuel injector plugs. Several of mine cracked the small red retaining clip. There is not much wiggle room for the harness, so they are just set in for now. 200 miles and they haven't come loose. Found some aftermarket plugs, but will have to splice and solder them in at a later date.Took the better part of the day, but I am no mechanic and had only watched some online videos and read the Chilton's manual.
Greener70
2025-08-14 09:43:29
Great tool and easy to use,,I highly recommend if ur doing a valve job,,great tool for a great price,,
john hilborn
2025-08-08 14:11:23
hard to use for me
D G 31
2025-07-28 15:30:32
I almost bought a tool online that only compressed the springs and cost $125. This tool removes the rockers, compresses and its small size allowed me to change the valve stem seals in-vehicle despite the tight clearances.
Thomas A Adkins
2025-07-21 13:57:53
This is probably the most useless tool I have ever bought. An 8-in flat tip screwdriver works much better and it's 10 times faster.
Lucsage
2025-07-17 11:04:33
Great
Daniel Scalf
2025-05-15 10:30:08
A little expensive but definitely worth it when you realize you can pull out your rocker arms and adjust your timing without worrying about bending your valves or damaging a piston. There are other ways of doing so but this tool makes it a snap to install and install lifters and rockers in a OHC Chrysler 3.7 and 4.7 engine.
Carlos Vejar.
2025-04-29 14:22:34
No logre quitar ni un candado del resorte.Al primer intento se quebro, no lo compren es basura y tiraran su dinero
Jkurbis
2025-03-30 11:54:16
Follows the correct order for valve removal / timing and it works perfectly.
Buffalo Head
2025-03-08 10:33:07
Seemed to work fine for me. Also seems to made quite well.
Manuel o.
2025-02-06 16:09:00
Se quebro en el segundo balancin
Tom K.
2025-02-02 16:14:37
It broke, didn't even finish the job.
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