Removing Valve Guids

[camerondownunder88]

Hi,

I have a 3K bigport head sitting on my desk at home that I want to give a rebuild so new guides,acid clean,skim, polish, port etc.

 

But I was curious what is the best way to remove valve guids from a head? What temp should I heat it up to if I need to heat it up and do corolla ones get pushed down out of the head or up out of the head towards where the rockers would be?

 

Cheers

Cameron

[madrolla68]

Hi,

I have a 3K bigport head sitting on my desk at home that I want to give a rebuild so new guides,acid clean,skim, polish, port etc.

 

But I was curious what is the best way to remove valve guids from a head? What temp should I heat it up to if I need to heat it up and do corolla ones get pushed down out of the head or up out of the head towards where the rockers would be?

 

Cheers

Cameron

 

Cameron why do you do this to yourself, take it to an engine reconditioner and have them fix the guides up and cut the seats at the same time mate. :o

[camerondownunder88]

madrolla68 you read my mind. I am getting a big port head redone for a hot 5K in the making BUT..... I plan to remove valves guides at home. Bead blast and acid dip head at work to clean it. Supply 2 sets of good valves that are cleaned and like new so the engine shop can pick the best ones. And also supply a nice set of dual valve springs :yes:

 

So all he will have to do is crack test the head. Cut valves to right angle, cut valve seats and then install new guides and the valves and skim head. DONE.

 

Oh I also plan to polish the ports at work also. So The more I can do the more $$ I save in labor. That is why I want to know how to remove the bastards.

 

Also I was at my engine builder today looking at his gear and he was showing me how it is done so he suggested I remove them my self so it is a cheaper but just as good job :o

 

Cheers

Cameron

[Des]

You have too much time on your hands to do this sort of shit.

[KE30_KE35_KE55]

they are removed and installed with a simple service tool very similar to a drift/ punch and a hammer,if you have access to a lathe I'm sure you could turn one up.

gradually heat the head in boiling water to 90 degrees knock them out.

[love ke70]

they come out pretty well when the head is cold.

just take a portion of the head with them :lolcry:

[Guest Sbox]

Deleted

Edited May 24, 2008 by Sbox

[camerondownunder88]

Thanks or all the information so far guys

 

Sbox I don't mind trying this my self. I asked the machinist at work today to make up a small drift for me that fits in the valve guide and sits over the edge as I hammer them out. But since I'm on holidays now this wont happen till next year. But I was reading in a corolla manual I had today it says 80 degress C heated and then hit them out. So I will also do this at work in the parts oven then they should fall out. I will then clean it at work and all the valves and it will be ready to machine up :lolcry: I will let you know how it all goes.

 

But I also don't mind doing this as I have been collecting parts for a while now and I have a few big port heads so if I break it meh. Not to worried.

 

But useless fact my engine builder said that there is about 2 thou crush when he inserts new guides to give me a guide on how tight they will be removing.

 

Cheers

Cameron

[Guest Sbox]

Deleted

Edited May 24, 2008 by Sbox

[Felix]

Cameron if you can remove the guides yourself, why not remove a set from a later head and install them in your bigport head. Once you have done that then get your engine reconditioner to install a set of k-line liners.

[TRD ke70]

if you heat the head up, (no more than 200c) you'll find they almost fall out.

Any hotter than 200c the alloy starts to go soft!!!

don't try and remove them cold as you can crack the ports if you hit them too hard.

Edited December 21, 2007 by TRD ke70

[camerondownunder88]

HAHAH Felix you guessed right. I am removing guides and installing later ones with real seals :lolcry:

 

But one big port head I have here has later KE70 valves seals in it but need replacing so the head is all ready set up for them. But good thinking.

 

Sbox no more ideas please..LOL Am still finishing off my metal smelter then have a few other to knock out..LOL But I do like the idea of a hot oil bath.

 

TRD ke70 I can do pretty much any heat so I might up the temp a little and see how easy they are to remove.

 

Cameron

[TRD ke70]

cool :lolcry: :fuzz: :bash:

[Guest Sbox]

Deleted

Edited May 24, 2008 by Sbox

[camerondownunder88]

Oh yes I am defiantly using new guides no point in installing old one. Yeah the ovens at work have thick metal grills in them or heat bricks or milled flat surfaces that are huge so we now it is flat. But well cross fingers it wont warp but if I initially try 80 degrees C it shouldn't (touch wood) warp to much..lol

 

And horse shoes..LOL Ill corner the market. Yes I know what you mean I got a tired 3K with poorly tuned asian carby and run over 500km a week in the ke30. Fuel bill is a pain and I usually how no dockets :lolcry: But hoping to get my new 3K in some time in the break.

 

Cameron