First off great website and thanks for all the prevous help on my rebuild but now Ive ran into another problem I can't find an answer. I recently finished my rebuild a few months ago. The motor sounds and runs great except for a little bit of lifter tick. This tick started to bother me so I recently purchased a set of 2.7 rockers and PT lifters from a member on here. I installed these last week with out removing the cams with pry bars but afterwards the car would not start. The motor sounds as if I don't have any compression at all like the new rockers/lifters are holding the vavles open. The car is over 2 hours away from my current residence and I was pretty pissed when it wouldn't start so I have not had the chance to check compression numbers (plus snow is making it difficult to get to my car). So my question is are these rockers/lifters taller/longer and holding my valves open resulting in loss of compression? Has anyone else had this problem?
PS: I did not compress the lifters before installing them could this have caused the problem? If so will they compress on their own after setting a week or two in the car or should I take them out and compress then reinstall them?
Thanks for any help or information.
Sorry should have mentioned this was a stock NA complete rebuild.

No, those lifter/rockers will work fine, as they are stock dimensions.

Are you sure the pry bar did not do damage? Never heard of that method before...

Originally posted by teklein
Are you sure the pry bar did not do damage? Never heard of that method before...

It's the two-screwdriver method. Just compresses the lifter so you can pop the rocker off and reinstall without removing came / timing belt / etc.

Typically, I bleed the lifters down in a vice before I reinstall.