Hi im new to this grinding the vavles what do i use first the coarse and the the fine or ehat. Sorry if it looks like a stupid question???

I expect there are some good videos on YouTube.

Hi im now to this grinding the vavles what do i use first the coarse and the the fine or ehat. Sorry if it looks like a stupid question???

If your valves and seats are in good condition you can just use the fine on its own. Otherwise start with coarse. Lap the valves in carefully, turning the valve in its seat as you work, until there is an unbroken line of matt grey running the entire circumference of both valve and seat. I check for leaks by filling the head's combustion chamber with paraffin and leaving overnight.

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⚙️ Restore your engine’s heartbeat with precision and power!

TRUSTED LEGACY - Backed by 100+ years of Holts automotive expertise
ALL IN ONE VALVE CARE - Everything you need to restore valve performance in one kit
LIGHTWEIGHT PORTABLE - Compact 148g kit designed for easy handling and storage
BOOST ENGINE EFFICIENCY - Remove stubborn combustion deposits to optimize fuel-air intake
DUAL GRADE POLISHING POWER - Coarse for heavy deposits, fine for a flawless finish

The Holts 1831593 VG4RA Valve Grinding Kit is a lightweight, all-inclusive toolset designed to remove stubborn combustion deposits and resurface cylinder head valves. Featuring dual coarse and fine polishing sticks, it ensures a gas-tight seal for optimal engine performance. Backed by over a century of Holts automotive innovation, this kit empowers professionals and enthusiasts alike to maintain peak vehicle efficiency with ease.

Reviews

J**E

Worked a treat.

This is fairly standard fare. Did the job and I'm happy with the results.

26.12.2024

M**D

Valve paste

Works great

9.03.2025

J**G

Does the job

Tubs of paste were about 1/3 full as others have mentioned although it is still more than enough to do a valve job. The suction on the tool wasn't the best but with patience and clean valve faces it wasn't too bad. Overall the engine is now up and running perfectly so they did the job for a good price.

17.02.2025

M**.

Lapping paste and tool

Does exactly as it’s supposed to. Be careful if you’ve got soft hands

13.04.2025

L**T

Good

Done its job

4.06.2025

J**R

Very easy to use

Great value and easy to use. Heavy paste to remove pitting (1 min grinding) then fine paste to polish up ( another minute). Superb.

11.12.2023

B**C

Will work well with a completely flat valve head.

I imagine this will work well with a completely flat valve head, however my Honda valves have a slot in them meaning the sucker kept losing suction. Eventually I made my own tool with a piece of dowel and a 1p piece glued into the end of it. This fits into the slot and doesn’t lose grip. The paste itself worked fine, and I will keep the tool for the next engine I work on which hopefully will have flat valve heads.

4.05.2025

T**D

Its everything the supplier said it was .

The item was delivered on time in good order just the thing i wanted to let me get on with grinding the valve s on my triumph motorcycle cylinder head .

10.04.2025

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Manufacturer	AutoMotion Factors Limited
Brand	Holts
Model	VG4RA
Batteries	Lithium Ion batteries required.
Item model number	1831593
Manufacturer part number	VG4RA
Item Weight	148 g

Holts1831593 VG4RA Valve Grinding Kit, Black

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