Wont necessarily bend valves, remember that you've got the lifters to compress first and then if there's enough clearance in the motor you could get away with it.

 

and for the third time, check comp and check your lifter preload. Otherwise you might be barking up the wrong tree.

I'd say you would get coil bind in the valve springs and strip the rocker pedestal bolt threads in the head before bending valves.

 

So the 5k has the lugs under 1 and 4 spark plug holes? If so you definitely need the shorter pushrods.

Will check compression once I get the right pushrods, as the reading will defintely be low at the moment. As for lifter preload, I don't know what that is!

 

Yes my 5K has the lugs under plugs 1 & 4. I've confirmed I need the shortest pushrods.

 

Does anybody know the part number of these things? I phoned Toyota and the reckon they can't find out which is which from their pushrods. I find this ridiculous, but that's what they said. If I can find out the part number of the shortest 5K pushrods, then I can order them new.

 

If anybody wants to part with a set, please let me know.

 

Thanks :)

You may want to get onto CraneCams. They may have something you need. 150mm or 5.9inches ball ends. It doesnt have to be a toyota pushrod. You just need the length and ends.

I'd also question the lifters and rockers if the pushrods are the wrong length. You say there are variables of all components and it's hard to say if its all the same.

I did say in a thread I started, 'K motor pushrod collaboration', that there was at least 4 different pushrods lengths for the 5k engines but changed it after wide criticism from some senior members.

 

I'll buy back what ever you don't end up using out of what I sold you.

Edited December 15, 201015 yr by GJM85

Something else to think about.... 5k hydraulic lifters, 156mm datsun pushrods and 4k adjustable rocker gear. You will be able to kill 3-4mm out of the 6mm difference by the adjustable rockers. Assuming preload isn't excessive the hydraulic lifters may be able to take up the other 2mm extra length. Assuming there is no difference in the rocker tower height.

 

BAM!!!

Edited December 15, 201015 yr by GJM85

Part number is 13781-13100 according to the thread:

Pushrod lengths

Edited December 15, 201015 yr by snot35

Thanks alot!

 

I'll have to give Toyota a call and see if they can find some under that number.

 

Cheers :laff:

Motor runs great now, just put the right pushrods in and she fired up first turn of the key!

 

I managed to track down a set of 150 mm pushrods via a Commercial & 4WD wrecker in Adelaide, were NOT easy to find.

 

Thanks to everyone who chipped in and helped me nut this one out! :y:

That's awesome dude, nice work! :)