Top information

How long do engine valves last? HowStuffWorks

They act as the gatekeepers for fuel and air to enter and exit the combustion chambers in your car s engine If one or more valves go bad, you ve got trouble -- perhaps even catastrophic engine trouble Knowing that engine valves are so important, how can we tell when one or more of them is about to go bad? And how long do engine valves last ....

lapping valves after a valve job

I was always taught that after a three angle valve job that you need to lap in the valves before putting the heads together The guy who flowed the heads for me told me NOT to lap them because it will cut out the sharp ridge from the valve job and hurt flow...

Head, Valve Job , when is it necessary?

Head, Valve Job , when is it necessary? - Answer A valve job is removing the cylinder head s from the engine so the valves, guides and seats can be refurbished to restore compression and oil control A valve job may be necessary by the time an engine has 80,000 or more miles on it, or to fix a burned valve, compression or oil burning problem...

Valve Seats Machining Guide

Apr 01, 2009 0183 32 Modern cylinder heads often have canted valves so on an older-style machine you have to tilt the fixture to machine canted valve seats and guid The fixture is relocated and set for each guide When using a modern seat and guide machine, the powerhead tilts, allowing you to adjust the powerhead for whatever angle you need...

Do I need to do a Valve Job?

Replacing valve stem seals during a valve job is an automatic must do and often times new valves guides need to be pressed into the cylinder head and then reamed to size The final factor in controlling the oil is the wear that occurs on the valve stem itself...

Types of Valve Stem Seals Guides Fel

This set contains 16 of the same valve stem seal The valve stem seals in this set utilize a premium FKM material and are designed to function properly on both the intake and exhaust valves and replace both the OE intake and OE exhaust valve stem seals You can count on Fel-Pro to always use the right material for every application...

Beginner s Port and Polishing 6 Steps

DO NOT grind away the topmost lip, this is the seat for the valve and damage will cause leakage Use a lower grit sander to start on moderate speed Slowly shave the excess metal off until the port is smooth Do not rush this, it s greatly preferable to spend weeks on this than destroy the head and have to ,...

Do new valves need grinding?

This might sound a bit of a dumb question, but do brand spanking new valves need cutting/grinding? I was planning on reusing my exhaust valves and I sent them off to the machine shop for bead blasting and regrinding, but unfortunately they ve been lost in the post by our splendidly incompetent Royal Mail which is unfortunately what we have to use here in the UK Now I m wondering if I was to ....

Do you need to grind new heads and valves

May 22, 2011 0183 32 Re Do you need to grind new heads and valves Many of the 60 292 truck and later Y block heads have the large valv Several years ago my 57 Bird 312 engine had some problems which turned out to be a complete rebuild of the engine...

How To Remove Or Install Intake / Exhaust Valves Repair

1 Thoroughly clean all the carbon off of the valve before you install Not that you have to do this, but you have the valves out and there is performance to be gained here depending on how bad your valves are The easiest way to clean the valves is with a wire brush wheel Below are some before and after pictures of cleaning up the exhaust ....

Titanium valves, lash caps and pressed

If you break a lash cap during a racing weekend you can usually fix it without dismantling the motor But if you have a similar mishap with a pressed-in hard tip, you are obliged to remove the cylinder head and install a new valve Lash caps-v-pressed-in hard tips...

Upgrading Fox Body Cylinder Heads

Porting these E7 heads, even an A job, may yield a 30HP gain 30HP is nothing to sniff at, except porting is very expensive Unless you do it yourself, you will have to pay a professional to do it for you At the end of the day, it isn t logical to spend 500 for someone to port these iron heads for a measly 30HP Of course, you can do it yourself...

How to Grind Valves Correctly

Jun 08, 2012 0183 32 Learn how to properly grind valv Use the correct techniques for valve lapping by machining them TiredIronVideos/...

Vortec Cylinder Heads The Definitive Guide NastyZ28

Jul 04, 2006 0183 32 Vortec Cylinder Heads The Definitive Guide , much wider than the old camel-hump heads from back in the day - and the intake valve seat has a 3-angle grind from the factory The intake valve is also back-cut as is the exhaust , awesome Vortec info as usual from you I believe the new GM Vortec Heads are casting number 060 but they ....

How To Lap Valves

To lap valves, you ll need valve grinding compound and a valve lapper, which is basically a wooden dowel with a suction cup on the end If you re checking the seal on a head that s just come off a car, wire wheel the carbon and gunk off the head and the sealing area and the stem Make sure there is no dirt in the valve guide or on the valve stem...

2010 kx250f valve replacement question

Sep 21, 2013 0183 32 If you don t want to pay someone to do this because some people can be ridiculous on pricing nowadays, Ive used valve grinding compound to seat valves in my rm-z and I never had a problem with it ive done this to many many heads you can get it from an auto parts store its cheap im sure a lot will advise from this but for those of us that like doing our own work, its easy and has been ,...

The Inside Angle on Valve Seats What you need to know to ,

Aug 01, 2008 0183 32 Mondello says you have to install the valve guides before you do the seats The position of the guides determines the position of the seats, so once the guides are in place, they can be used to pilot the position of the seats On Harley heads, we drive the valve guides into the head from the top from the spring seats...

How to Port and Polish Cylinder Heads Eastwood Blog

May 23, 2016 0183 32 How to Port and Polish Cylinder Heads Porting cylinder heads for better performance is as much an art as it is a science Strange as it may seem, just making the intake and exhaust passages bigger will not always improve performance, and may actually hurt it...

unleaded gas vs non hardened valve seats The HAMB

Aug 28, 2013 0183 32 Most were not totally shot but some were Some had the seats hammered in more than a 1/8th inch and the valves tulliped or cupped out like a flower Now that being said, who knows how many miles it took to do that It will happen, just a matter of how long will it be Is it worth the cost to change them now or wait until you do a rebuild...

Home valve seat grinding

Jun 18, 2014 0183 32 Don t forget that the valve guides get worn and are a good place for the engine to suck oil oh, don t overlook the valve guides for restoration during your valve job, or you might be tearing your hair out before you start doing your valve job over If your heads need a valve job, instead of minor dressing, you might regret cheaping out on ....

DO NOT LAP YOUR VALVES

Jan 17, 2003 0183 32 confused now i have my head apart and valves out, cleaned up the head, the port area will be reassembling in a week or so , it is ok to lightly lapp you valves when installing new valves, but you can not GRIND them because they are only surface hardened and you will ruin them , DO NOT LAP YOUR VALVES Quote...

Do you need to lap brand new valves with new seats ,

May 21, 2012 0183 32 Do you need to lap brand new valves with new seats? - posted in Engine Hey guys, I got new valve seats fitted and brand new valves with 3-angle job on each, Do you need to lap valves in a new setup like this? or is it only for used valv...

Valve Grinding 4 Engines 8 Steps

How to grind the valves on your engine The Do It If you use brand new valves, you will still need to grind the valves and seats to ensure a proper seat The rockers will need to be adjusted anyway Clean the engine head and valves thoroughly You do not want to have any grinding paste left on the engine head...

The Complete Cylinder Head Guide for Chevy Small Block Engines

The Complete Cylinder Head Guide for Chevy Small Block Engines A factor more influential toward successful high-performance engine building than any other is the cylinder heads Without adequate airflow, the engine will never make power...

Engine Head And Valve Work

Feb 07, 2007 0183 32 Check out this guide on doing head and valve train work to gain more horsepower from Import Tuner Magazine , have the same shop that does the headwork grind you a ,...

Hand Valve Lapping Needed?

Apr 08, 2007 0183 32 I am having leakage on the intake valves of my new Dart heads and valves on my small chevy when shop air is applied into the compustion chamber threw the spark , you need to pick up a simple leak down checker You don t need a high dollar unit, Harbor Freight has a nice little cheapy that works just fine , After grinding valves and valve ....

Valve lapping, for or against

Mar 25, 2011 0183 32 Valve lapping, for or against , and some that say do it anyway, every time you have the head off as it can never do any harm , you won t need to re-set valve clearances...

Can you Lap Titanium valves?

Oct 31, 2007 0183 32 If you install new valves you need new seats cut, and a lot of times guys really need new guides but don t replace them so they wind up with a valve job that doesn t last long With a new head you get new guides and new seats, so your bike should run great and last a long time...

How To Grind/Seat Valves and Replace Seals

Dec 09, 2012 0183 32 TheCousinDan shows you how to replace your valve seals and grind the valves into a proper seat in your cylinder head...

What Is the Average Cost of a Valve Job? Reference

The average cost of a valve job is highly dependent on how many valves the car s engine has and what type of engine it is A valve job for a 4-cylinder engine costs approximately 85 per valve repaired The purpose of a valve job is to resurface the poppet valves and their seats, which control the flow of air and fuel to move the pistons...

No.416 Jianye Road, South Jinqiao Area,Pudong New Area, Shanghai, China.

Telephone : +86-21-58386189, 58386176

FAX : +86-21-58385681