|
|
|
|
 22re Valve install
#821410
06/27/07 04:24 PM
|
Joined: Feb 2004
Posts: 290
OP
Mudrunner
|
I just got all of my engine components back from the machine shop and apparently my head (EB stock head) failed the pressure test on the # 1 cylinder. They said that both valves were bent? Weird... I told them I'd take care of it.
A little background > I blew a headgasket a few months ago and decided to rebuild the bottom end. The Headgasket blew between the number 3 and number 4 cylinders. The engine ran great before hand and I'm certain the valves weren't bent at this point. The only thing that was odd was the amount of carbon buildup on the number 1 cylinder.
Anyway, I have a fresh rebuild kit from EB ready to go in.. including a new set of stock valves. > I was under the impression that these could just be dropped in without any other work. I've done some research and discovered that 'lapping' compound or machine work needs to be done.
Is this really necessary? If so, where can I get this and how is it done?
Last edited by Kaptain; 06/27/07 04:25 PM.
93' Toy xCabbobbed > 22rEB > w56 > stock duals > SAS > 4.88's > 37's
|
|
|
Re: 22re Valve install
[Re: Kaptain]
#821411
06/27/07 05:36 PM
|
Joined: Apr 2000
Posts: 4,230
Roll Me Over
|
Yes, at the least, lapping and that depends on the valve seats condition.
David Fritzsche
1990 Ex-Cab V-6,5-speed, with a few mods
04.5 CTD Dodge 2500 Ram--Tow Rig
Roseville, CA
"Serenity through Sobriety"
|
|
|
Re: 22re Valve install
[Re: OOP'S]
#821412
06/28/07 06:49 AM
|
Joined: Dec 2005
Posts: 297
Mudrunner
|
If your valves were bent, is there also a possibility that the valve guides are worn from three point contact of a curved valve stem sliding through a straight tube?
Sold Truck: 89 DLX extra cab 4x4 22re Automatic/ New truck 97 T100 4x4 auto Sr5
|
|
|
Re: 22re Valve install
[Re: Kaptain]
#821413
06/28/07 08:35 AM
|
Joined: Oct 2002
Posts: 15,887
Toyota & Classifieds Moderator
|
Kap, start around page 9; that'll give you some idea of the lapping process. Head rebuild This is out of the FSM that's sticky'd here btw.
http://www.walkablecommunities.org/Democracy is two wolves and a lamb voting on what to have for dinner. Liberty is a well-armed lamb contesting the vote. **ubi apis- ibi salus**
|
|
|
Re: 22re Valve install
[Re: kewlynx]
#821414
06/28/07 12:27 PM
|
Joined: Feb 2004
Posts: 290
OP
Mudrunner
|
If your valves were bent, is there also a possibility that the valve guides are worn from three point contact of a curved valve stem sliding through a straight tube? Kap, start around page 9; that'll give you some idea of the lapping process. Head rebuild This is out of the FSM that's sticky'd here btw. Thanks guys, I know what I'm doing now... I don't think I'll have much trouble since the head is less than 2 years / 20k miles old. Plus it's already been magnafluxed and cleaned.
93' Toy xCabbobbed > 22rEB > w56 > stock duals > SAS > 4.88's > 37's
|
|
|
Re: 22re Valve install
[Re: Kaptain]
#821415
06/28/07 03:42 PM
|
Joined: Jun 2003
Posts: 3,576
Roll Me Over
|
>>>*Lapping is something we do as a final check to fit, and then only very lightly. A properly machined fresh seat will lap itself in operation as the valve rotates when running.
One thing to remember is checking the fit. We use a wide black marker pencil and coat the valve face. Press it against the seat and rotate the valve 1/4 turn back and forth to create a mark.
It is important to not rotate completely when checking, or any high spot on the seat will create a nice even circle in the paint marker.
Set the valve in the guide, use a short piece of 5/16ths ID rubber hose over the stem of the valve, this helps give a good grip for lapping if you don't have a lapping stick handy.
A lapping stick is just a short shaft with a suction cup on the end, those kinda sorta work, I like my rubber hose trick better.
If you get a clear thin mark 360 degrees on the valve face, good to go. If the mark is very wide, have the seats recut.....*EB
*Beats the he** outa me!....*LOL**...
|
|
|
Re: 22re Valve install
[Re: engnbldr]
#821416
08/22/07 04:50 PM
|
Joined: Feb 2004
Posts: 290
OP
Mudrunner
|
>>>*Lapping is something we do as a final check to fit, and then only very lightly. A properly machined fresh seat will lap itself in operation as the valve rotates when running.
One thing to remember is checking the fit. We use a wide black marker pencil and coat the valve face. Press it against the seat and rotate the valve 1/4 turn back and forth to create a mark.
It is important to not rotate completely when checking, or any high spot on the seat will create a nice even circle in the paint marker.
Set the valve in the guide, use a short piece of 5/16ths ID rubber hose over the stem of the valve, this helps give a good grip for lapping if you don't have a lapping stick handy.
A lapping stick is just a short shaft with a suction cup on the end, those kinda sorta work, I like my rubber hose trick better.
If you get a clear thin mark 360 degrees on the valve face, good to go. If the mark is very wide, have the seats recut.....*EB Thanks to all... I used the EB's method to lap the valves which worked quite well. She's all back together and running great (less than 1000 miles on it so far). It pulls alot harder and has a perfect power band for highway driving. I hardly have any trouble holding 65+ with 37's and 4.88 gears. 22re Bored 40 over EB rebuild kit EB 268 Cam 2 inch exhaust ARP head studs
93' Toy xCabbobbed > 22rEB > w56 > stock duals > SAS > 4.88's > 37's
|
|
|
|
|
|
