cylinder head welding
Turbo Mini Forums

Hello!

One question: Is it possible and advisable to weld a head? The inlet-port of mine got to big (don't lough - i didn't made this!), and i think the temporary solution with the small tube at the push rod port will not make leak tightness:



Will it bend so that l have to make surface flat?

Thanks for tips!
Andreas

http://www.minifreunde.at

sleve the push rod hole...

:)

its a common trick on modified heads if you go to far!!

Alex

AlexF

Now I asked a firm, which is specialized on welding. AND IT IS NOT POSSIBLE!
The Problem is not the cast-material. The problem is the accessibility into the hole.
I will turn a exactly sleeve and mould it with loctite glue...

Edited by akirch on 5th Jan, 2005.

http://www.minifreunde.at

Trying to weld cylinder heads is a nightmare, go with the sleeve !

Phil.

WWW.TURBO-MINI.COM

If you get the head welded by a pro, you will have to re plug and skim it after as they have to heat the head up ti weld it, i've had a few of mine welded in past where they have cracked, and it works ok.

Best 1/4 mile 13.2 seconds @116 mph
First 5 port miniturbo to make over 200 bhp on a carb?
First 5 port miniturbo to make over 200 bhp on Injection?

http://www.mattwoodsphotography.com

you can sleeve with a section of copper pipe then siver solder it then drill out push rod hole and smooth of the port throat, had this done on one of mine with great sucess.

always looking for them bigger bunches of bannanas

I mould in an aluminium sleeve which had 0,2mm bigger diameter than the hole. A pilot and a big hydraulic jack made a smooth job...

http://www.minifreunde.at

Useing the search thread to look for some info and found this. Sorry for resurecting this thread.

Having done similar to a head I recieved a call from the welders to say that the head had been welded. He said in the begining that there was an 85% possibility that it was scrap. But I got a call at lunch time to say that he had accomplished what he though was impossible due to access.

Own the day

As the other say, if it's the push rod hole, sleave it.

If it's not in the combustion chamber or directly behind the valves braze it, it's easier and lower temp than welding.

For the combustion space and around or near the valve seats, it is possible to weld them, but the head has to be pre and post heated so as to reduce any stresses from the welding.

You wouldn't happen to be 'nightrain' from the other mini forums would you?

Digging up ancient threads to give advice on...

Scrap it and get another head!

Minivanless, but reluctantly happy living with the decision. There'll be another one day.
http://www.youtube.com/profile?user=minimadmotorman#p/u

yeah what he said ^^^^^!

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM