e tech yokes

[07cl733]

Hello all, my seemingly endless e tech project has hit another snag and I could sure use some input on this problem. I ordered new heads from ATL diesel, FedEx damaged one and over 4 weeks later I finally got a replacement. I bolted them on and realized the heads are from a newer engine with pinless intake yokes. I have a parts engine with pinless yokes that I could steal and install today, or the heads are drilled for pins which I could order and install whenever they arrive. My question is, is there any problem mixing these yokes from two different engines? Also, the parts motor has an engine brake but standard, not spring loaded, push rods. Is that normal? 

[Joey Mack]

yes to using the pinless intake bridges. and spring loaded pushrods came out around 2001/2001 with the CCRS engine series. there is a back-cut on the exhaust lobes and the spring loaded rods helped keep the lifter on the cam, or so they say.  Look at your cam part number and compare it to a CCRS engine. 

[07cl733]

Thanks Joey Mack. My 1999 built engine has all spring loaded push rods, intake and exhaust. Is that normal, or should they only be on the exhaust? I'll check the camshaft. It is a new PAI part and supposed to be for this e tech, engine, but so were the heads. 

[Joey Mack]

For some reason my memory of 12 spring loaded pushrods is poor.  I remember 12 rigid, and 6 of each. Spring loaded only on the exhaust.  Its sad that I am unsure, as many of these as Ive done.  

[07cl733]

Okay, thanks again. The manual only says they used different push rods, not when and where. These engines have been around so long that I find myself robbing an engine made up of multiple other engines to piece together a different engine made of multiple other engines. 

[fjh]

16 hours ago, Joey Mack said:

For some reason my memory of 12 spring loaded pushrods is poor.  I remember 12 rigid, and 6 of each. Spring loaded only on the exhaust.  Its sad that I am unsure, as many of these as Ive done.  

I believe the spring load thing came about with ceramic lifters don't quote me on it just my vague memory on it !

[Joey Mack]

It did, in the CCRS series due to a back cut on the exhaust lobes

[07cl733]

Well my pre ccrs engine had 1 ceramic lifter and 12 spring loaded push rods.  I put the same push rods back in, along with all steel lifters, but your info on this may come in handy in the future if I have any problems with them. I can certainly change out the intake rods to the cheaper, standard style.