Projects In need of help, Jenkins OHV B motor parts

Hey, Doug;
I must have missed what your builder found to be the issue on the #4 piston +.060 high.
Too long C-C rod length, or piston pin .060 too low?
Just curious... I'd guess the #4 was previously replaced???
Marcus...

 

So an update.
Pat has been working his magic on the jenkins and giving her the needed attention. 1st off there was an 1/8 space between the head and motor originally. As the clearances were right. Pat had the head fully welded and milled down to remove the gasket.
Next he discovered thst it didn't have hardened valve seats so he installed those and went a little bigger with the new stainless intake valves.
Also while working the rocker arm situation he moved the whole rocker arm ***embly forward and built custom billet aluminum 4" roller rockers so now we have the correct ratio/clearance with the pushrods and block. The jenkins is have is one of the later California ones and the valve covers aren't flat and curve up to clear the intake runners, so in a effort to seal better and not leak oil. Pat cut the bottoms off the valve cover and will weld the bottoms down thus creating a dam to keep the oil in and then the valve covers ca. Seal better being a flat surface. The next thing he is tackling is the oiling system as before they had 1/16 copper line running thru the head/water area and coming out at the rocker stands. To prevent oil line failures he is talking about moving it externally and going thru the bottom damn part of the valve covers now. Pat is doing an amazing job and has so much knowledge when it come to the jenkins and 4 bangers. I just mailed him the vital parts with the plan of him putting it on his test stand to get it dialed in. Pat had been fixing alot of issues from when the motor was first built and dealing with things that we not square or right. Doug

 

Cool thread and great to see the head being put back in service

 

Slow with updates but reaching the finish line with the rebuild. Alot more has happened with the motor. Flew out this week to check it out in person before she gets shipped from Pat to me in biloxli. Pats attention to detail and craftsmanship is top notch. Also Dave wheeler helped a bunch with his amazing aluminum welding skills. Every part had been touch modified improved and re worked. Super close to firing. Just a couple fuel fittings and should be there.

 

Pat had created the file for this intake the intake 20 years ago for the original one he made for Max and his Jenkins. He kept it the same as an tribute to the original.

 

The combination of a rare head, the knowledge and expertise of the engine builder, welder, other machinists and all the suppliers involved was quite a spectacular undertaking, let alone your tenacity to follow through to completion.
Well done!

 

Well done! That is nothing short of mechanical art.

 

This proves the HAMB is the place to see the work of talented craftsman. Wishing you the best when it is ready to fire.

 

That’s amazing

 

I'll 2nd stovebolts comment............amazing & a credit to all those involved.