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Rb20Det Lifters

nisskid

By nisskid,
in Engines & Forced Induction

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nisskid Grand Master

nisskid

Posted
Posted

Hey guys, having a few issues with a new head im putting together.

I currently have 2 heads, 1 off my car which afaik is an original 89 GTS-t M-spec RB20DET (call this head A), which is warped and buggered, another which is off an unknown R32 RB20 (meant to be original R32 engine) which im planning on putting on mine (head B).

the issue is, the lifters out of head A are different to the lifters out of head B, the internal design is slightly different, and the oil pickup line is at a different height. i got an extra few lifters (2 were seized in when i tried to bleed them) from another 2 rb20's and one engine again had one design, the other engine the other design. so all up i have lifters from 4 engines, 2x with one design, 2x with another.

now i'd just put lifters from head B into head B, but not knowing they were different, i already bled the lifters from head A, and reassembled head B with them in there.

so what im getting at, is what does the different design mean? later model design change? does it matter which ones go in?

i called nissan, and they said there is only one type of lifter they supply for the RB20, which makes me think they are universal, even so i want a definite on this before i put the head back on.

thanks guys

additional points:

external dimensions are the same (besides oil line)

both seem to feel similar when pressed

when fitted and assembled, it seems to be pushing the valves open and closed fine.

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Simon-S14 Grand Master

Simon-S14

Posted
Posted

Hey guys, having a few issues with a new head im putting together.

I currently have 2 heads, 1 off my car which afaik is an original 89 GTS-t M-spec RB20DET (call this head A), which is warped and buggered, another which is off an unknown R32 RB20 (meant to be original R32 engine) which im planning on putting on mine (head B).

the issue is, the lifters out of head A are different to the lifters out of head B, the internal design is slightly different, and the oil pickup line is at a different height. i got an extra few lifters (2 were seized in when i tried to bleed them) from another 2 rb20's and one engine again had one design, the other engine the other design. so all up i have lifters from 4 engines, 2x with one design, 2x with another.

now i'd just put lifters from head B into head B, but not knowing they were different, i already bled the lifters from head A, and reassembled head B with them in there.

so what im getting at, is what does the different design mean? later model design change? does it matter which ones go in?

i called nissan, and they said there is only one type of lifter they supply for the RB20, which makes me think they are universal, even so i want a definite on this before i put the head back on.

thanks guys

additional points:

external dimensions are the same (besides oil line)

both seem to feel similar when pressed

when fitted and assembled, it seems to be pushing the valves open and closed fine.

its possible that the earlier model RB20 (cefiro type) has different designed lifters then that of an R32.

it all sounds like they wuill work fine in your application tho. as long as they are bled up and arent seized

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nisskid Grand Master

nisskid

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yeh what comforts me a bit is that nissan only supply one type of lifter these days, which tells me they are universal, but the question is, while it's out, is there a reason nissan went with the new type of lifter?

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JonnoHR31 Grand Master

JonnoHR31

Posted
Posted

how different is the oil line? is it still gonna sit within the feed hole from the head, as in its not so different that the lifter groove will sit miles above or below the feed hole and therefore receive no/little pressure?

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nisskid Grand Master

nisskid

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yeh kinda, both will move through the opening for oil at some stage, however it looks like the ones out of head A are sitting in the opening at rest, and probably all the way through their movement, whereas the ones from head B look like they are on the border of the opening at rest, about half of the ring in, but this is from rough measurements. either way both head castings look the same, or close enough, so ive taken the risk and left the head A lifters in.

i should however note, with no pressure on the lifters (freshly bled) the head B lifters have more movement than the head A lifters, but both sit at the same height at rest.

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  • 6 years later...
iruvyouskyrine Grand Master

iruvyouskyrine

Posted
Posted

Thread necro.

I have the same situation. I went to clean my lifters and found a bit of a surprise. One set came out of an RB20DET and one set came out of an RB20DE. As you can see they are 2 completely different lifters. The internal depth on one is very different to the other (10mm compared to 7mm) and they are just very different overall. Like stewy said, Nissan FAST says that both engines should use the same lifters, which have P/N# 13231-79S00

Has anyone else ever come across this before? Seems kind of weird and the OP never replaied so not sure what ever happened.

Pics attatched below, lifter on right is RB20DET and left is RB20DE

 

23107226_10155943601513130_1236873717_o.jpg

23131055_10155943600568130_1885594206_o.jpg

23134862_10155943600528130_606228162_o.jpg

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