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Things To Do On A Headless Block

nisskid

By nisskid,
in Engines & Forced Induction

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nisskid Grand Master

nisskid

Posted
Posted

i have a list of things to do while the head is off, but keen to hear about anyone's experiences of small items which have failed for others, that might be worth replacing/checking/fixing while the head's off.

knock sensors is one im unsure of, not sure if they are worth doing.

it's an old RB20, 200,000+, seen a tonne of thrashing, a lot of overheating. some of the big obvious stuff which will obviously get done:

head gasket

water pump

timing belt

heater hoses

ideas on anything else?

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STATUS Grand Master

STATUS

Posted
Posted

fark with 200 +kms just throw in another motor... average rb20 goes for around 200-400 bucks

but if you have the head off check the valve guides and check the valves for mushrooming. replace stem seals but only if the guides are ok or your wasting your time..

discopotato03 Grand Master

discopotato03

Posted
Posted

Well if the bottom end is/could be questionable I'd think spending money on its top end is too .

You get so much more bog std from an RB25 that if it can be done legally in your state it'd be my no 1 move .

A good std one tuned properly , std engine + manifolds that is , should eat a 20 in a road car mainly because into the larger bore they had bigger ports and valves .

Other than this a good runner RB20 would be the best bang for buck I think .

A .

nisskid Grand Master

nisskid

Posted
  • Author
Posted

fark with 200 +kms just throw in another motor... average rb20 goes for around 200-400 bucks

but if you have the head off check the valve guides and check the valves for mushrooming. replace stem seals but only if the guides are ok or your wasting your time..

engine is fine, just doing a freshen up as ive just done some work to it to push 250rwkw.

head's getting pressure tested, if there's any leaks through the valves they will be checked and seals replaced, if not ill leave them.

nisskid Grand Master

nisskid

Posted
  • Author
Posted

New exhaust manifold studs.

thanks mate, already done.

Well if the bottom end is/could be questionable I'd think spending money on its top end is too .

You get so much more bog std from an RB25 that if it can be done legally in your state it'd be my no 1 move .

A good std one tuned properly , std engine + manifolds that is , should eat a 20 in a road car mainly because into the larger bore they had bigger ports and valves .

Other than this a good runner RB20 would be the best bang for buck I think .

A .

dont wanna use a 25 mate, have one sitting a meter away from the car too, doesnt interest me. keep the comments RB20 related, i've been around skylines long enough to know what engine i wanna use lol

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