• To ALL forum users - As of late I have been getting quite a few private messages with questions about build ups here on the forum, or tech questions about your personal project. While I appreciate the interest, sending me a private message about these topics distracts from, and undermines the purpose of having a forum here. During the day I wear many hats as a small business owner-operator and I work tirelessly to provide the absolute best service possible to you, our valued customer. When I created this forum I rounded up some of the best minds I knew so that any tech question you might have could be asked and answered by either myself or one of my highly experienced moderators, this way the next time this same question is asked the answer can be easily found and utilized by the next IH enthusiast having the same question. This allows me the freedom to run the day to day operations of the business and minimize the impact to shipments and shop activities that these distractions can cause. It is of the up most importance for me to complete the daily tasks in order to best take care of you our customer, all the while providing you a forum to get the level advice and input you have come to expect and deserve from the premier IH shop in the country.

    So with that I ask that anyone with a question about one of our build ups or a general tech question to please use the forum as it was intended. I am absolutely available by telephone to answer your questions as well but at times may direct you back to our website to better field your question or questions. Most other private messages I will be glad to answer for you.

    Thank you for your understanding.

    Jeff Ismail
    Owner/Operator

Timing Set Indexing For SV and 4 CYL APP's

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Robert Kenney

Super Moderator
michael,
I believe that they did clean the rocker shafts because I "believe" I saw new welch plugs in the ends. The heads/valves/springs were relatively new(headwork done by xxx for previous motor) but they took them back and reworked them to make sure ther was no bearing material stuck anywhere in them or in the rockers; thats what I'm told.
There is something about this motor that is wrong. I don't know what. All I really know is that it doesn't run worth a damn. I'm about to yank the thing out and just give it to Robert. Maybe there is a chance I can find a runner 345 to throw in for a while until he/we can get to mine. I got 7k in this freekin' thing and I shouldn't be having these problems

Shoot man why not a 383? :gringrin:

your cam is ground 3* advanced. A good thing but you are still unhappy with it so let's fix it.

Anytime...... After the usc/ucla game.:dita:
Robert
 

Michael Mayben

IHPA Tech Moderator - Retired & No Longer Online
I agree tim, this motor is a worst case deal from the gitgo! But that doesn't help ya right now.

I'd not trust the rocker assembly whatsoever! I'd definitely disassemble and verify what "xxx" told ya! It's too simple not to check and verify.

So do you think the rocker shafts "might" have been purged from the original head build? Or after it was ripped into the second time? "cam bearing" material in the rockers is not hardly likely, the pieces would be way too big, tiny particles are not the failure mode of the babbitt material! But accumulated years of sludging is what gets 'em.

But again, ya gotta verify if a valve(s) are stuck/sticking while watching the motor run (and oil). If all of a sudden the vacuum has gone wackeee, then something is wrong and the trickledown is still taking place!

I'd not pull the heads or motor until ya watch the lube system! Otherwise you will never be able to get to root cause of this poor performance, all areas need to be diagnosed! And if "top end lubrication" does show to be faulty, then I see total reimbursement of this whole deal by "xxx". So video the oiling (or non-oiling) of the top end so your attorney can have sumthin' ta play with.

As the motor is now running...ya need to do and video the following:

1) oil pressure cold right off the first tap in the gallery.
2) oil pressure hot at the same point.
3) hot compression (just like when the motor is running).
4) hot leakdown.
5) rocker assembly lubrication including oil drool to the valve tips and the pushrods.
6) cam lobe condition as measured at the rocker with a dial indicator (nothing fancy, just looking for an abnormal lobe or three).
7) video of the vacuum gauge face while the motor is running and verifying that timing and carb idle mixture are ok and no potential vacuum leak noted; also include some notation of the altitude where this data is being recorded.

You already have the pics of the cam gear alignment, that's additional "proof" to use in documentation.
 

Robert Kenney

Super Moderator
This thread is intended to show where the availible sv timings sets install with respect to each other and not a place to post specific question regarding a specific engine build.

Lets move mp's posts to another thread. Mm can do it or I'll do it later.

Moved!
 
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