71 x 103 engine rescue

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E_bug
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71 x 103 engine rescue

Post by E_bug » Sun Apr 15, 2018 2:43 am

What should I do with this cylinder head.
The shop that rebuild the head for the previous owner said it's ok to use. :shock:

Since its a salvage build of a previously modified engine that lost a valve seat I would like to avoid welding since it has New guides and seats. !
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Last edited by E_bug on Thu Jun 07, 2018 12:20 pm, edited 2 times in total.
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wreck
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Re: Cylinder Head rescue

Post by wreck » Sun Apr 15, 2018 4:13 am

it's a bit hard to see from the photo but it looks like it's already been flycut a fair bit by the distance to the spark plug .If so fly cutting the head to get rid of the damage is not an option. I would get a new AMC blank head and get the hard ware swapped over . All the indents in my opinion will hold carbon and cause hot spots causing pre ignition .
No matter where you go , there you are !

E_bug
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Re: Cylinder Head rescue

Post by E_bug » Sun Apr 15, 2018 10:12 am

Will those aluminium repair rods durafix work? I guess they will melt right of with the engine running..
My welding sucks .

E_bug
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Re: Cylinder Head rescue

Post by E_bug » Mon Apr 16, 2018 3:03 pm

They mention 732F melting point.. Hmmm that wont cut it .. Maybe for a cylind r head cooling fin ;)
My welding sucks .

E_bug
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Re: Cylinder Head rescue

Post by E_bug » Tue Apr 17, 2018 10:38 am

I am posting a pic from m lifters.. They are all flat and have pitting damage. How much material can be removed to clean them up and regrind to spec?

Also posting rocker pics. What should I do with those if anything ?
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E_bug
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Re: Cylinder Head rescue

Post by E_bug » Tue Apr 17, 2018 10:50 am

And the rockers ..
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Clatter
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Re: Cylinder Head rescue

Post by Clatter » Wed Apr 18, 2018 6:55 pm

While it's not ideal,
The shop that rebuilt those heads is right,
They are OK to use.

Not great, but OK.. LOL!

Seriously, the chambers will fill up with carbon soot, and any sharp edges are unlikely to cause detonation in most normal driving.
If you are going for max best power/perfection, it wouldn't do,
But they will likely run for years and years of typical street use.

Nice big valve heads with opened chambers and all.. I'd clean a few of the burrs up that stick into the chamber area.
See if you can measure a difference in the ccs.. If not, run it!


Send those lifters to SLR for a re-grind and parkerize.
If they are too far gone to re-do, then nothing lost but some postage, right?


Most people like the 1.7 rockers because they take the typical swivel feet in 8mm size,
but they make swivel feet for those bigger ones now. there is a guy in Europe selling them, can't remember the name..

Solid shaft spacers, bigger mounting studs, new shafts; different things work for those later rockers as well.
"Oh, You don't need to do all that... The valve seats are just going to fall out of it anyway!"
- Doug Ellsworth

Beginners' how-to Type 4 build thread ---> viewtopic.php?f=1&t=145853

E_bug
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Re: Cylinder Head rescue

Post by E_bug » Thu Apr 19, 2018 3:12 pm

Thanks for the advice! Not going for max f1 power per cc .
Btw what are these rockers that i have?

I have to look for a shop that will grind them locally . Shipping to usa from this side of the pond would prob be as much as a set of lifters.

I noticed on the other side of the lifter there is a retaining clip c clip . Can i have the lifter 101 class please :)
Last edited by E_bug on Fri Apr 20, 2018 2:16 pm, edited 1 time in total.
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wreck
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Re: Cylinder Head rescue

Post by wreck » Thu Apr 19, 2018 4:47 pm

http://www.tp-technologie.de/produkte%2 ... h%20en.htm. Thorsten is the person that makes the 10mm adjusters . I would also look at his tool steel type 1 lifters and bushes . I would not want to re use those lifters , I think it would be worth sending an email with photos to Webcam and ask them if a new set of their lifters will be ok with the old cam . Cams and lifters are one of the biggest headaches with flat tappet engines now . years ago you could slap together just about any cam lifter combo and mostly get away with it , not now .
No matter where you go , there you are !

E_bug
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Re: Cylinder Head rescue

Post by E_bug » Sun May 06, 2018 10:16 am

Why do those lifters have a c clip on the bottom side ?
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raygreenwood
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Re: Cylinder Head rescue

Post by raygreenwood » Sun May 06, 2018 11:53 pm

Your lifters are junk. Do not waste postage. Buy cam with lifters and use the correct oil for break in. As others have noted....if you can get proper tool steel lifters you can use them with almost any cam.

Otherwise buy cam and lifters together and follow the mfg instructions to the letter.

As for the "circlip"....you mean the one on the pushrod side inside the lifter? All of the Scat and Webcam lifters have had that for years now. It holds in the hardened "button" that the pushrod rides on. It makes it to where in mqnufacturing you cqn havd the lifter body and cam face at one hardnessand the pushrod wear point at another. Ray

E_bug
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Re: Engine rescue

Post by E_bug » Sat Jun 02, 2018 10:17 am

Can i convert to hydaulic lifters ?

And i found out that my case is cut for a porche fan... I will need to be creative on that because i really dont want a porche style fan .. I have csp knock offs for upright cooling.
My welding sucks .

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