It sorta sounds like a lifter rattle, but apparently these engines don't use lifters, they use shims? are the rockers adjustable?

 

any help would be appreciated.

 

Mick.

All my 4ac's used to rattle. I thought it was pinging. I wouldnt be too fussed. As long as its got oil and water it will go forever..... and ever...... and ever... then pull it out and attach it to a chain on the end of a boat where it will find its true calling.

lmao, ya, well, its gotta not fail on me, cos i do a lot of high-revving, you see.... :n:

Hmmm, sounds interesting. I thought it may due to the lack of oil or something.

 

It sounds fine if u don't push it, but i don't have a tacho, so I'm guessing at about 3500ish RPM, it starts to rattle a bit. Does anyone know if the rocker gear is adjustable as such?

 

And how hard is it to change a head gasket?

easy as :n:

Do you have a step by step guide jamie? :n:

other shit off, head off, clean deck, new gasket on, reassemble

 

buy a gregories manual

Hmm, i might go ebaying next week..... :n:

Did an oil change, still rattles. Sounds like tappets are out of adjustment. Anyone got the specs for clearance? Would love to eliminate the rattle and its definately not the head gasket.

 

:(

they're in the faq

Looked for an hour. Could not find tappet clearance specs for a 4A engine. sure they're there?

oh yeah, i'm used to K motors :(

manual time for you :D

I know you are all 4-AC haters, but its my pov-pack performance engine. lol.

 

Just pissing me off with tihs rattle. I don't wanna pull high revs and kill something, like valves.

i have an idea: just set them to something and see how quiet they go

 

you could probably get away with something like 6/8 on a stock engine, 10/12 would definitely be enough to not burn out valves

 

running thicker oil makes your tappets alot quieter

do you still need tappet info and cam timing info???

i have them here.