[68Datsun510]

Is it common for the KA24E's to crack their exhaust manifolds? I dont know for sure, but i think mine may be cracked, a light clicking sound thats around thru the entire rev range.

On the other hand, it may be a bad lifter, but it sounds more like an exhaust leak as its definitely more noticeable on hard acceleration, or when revving the engine.

 

[68Datsun510]

Seems like a lot of 'Yotas do it too, ill try some marvel mystery oil in my next oil change, helps hydraulic lifters, and I'll tighten those mani bolts. Thankfully, 1A Auto: Aftermarket Auto Parts, Car Parts, Replacement Auto Body Parts, Truck Parts sells updated and fixed exhaust manifolds. Used one on my Z22E before.

 

[68Datsun510]

Whaaaat? Um, maybe you need to brush up on your nissan engine knowledge, the KA24DE uses shims to adjust the valves, the KA24E uses hydraulic lifters just as the SR20DE does. Both engines make that clatter on startup because of that.

Now maybe your thinking of the Z24i which is indeed a solid lifter/adjustable setup.

Not trying to sound like a jerk at all, this is more so you can avoid looking like a doof in front of a mechanic or what not lol =)

 

[68Datsun510]

SEALED POWER Part # R1018 More Info
12 valve engine; Loc. Int. Front; Rocker arm w/lifter (integral type)