black top head on grey tob bottom end

[blackie_2k5]

can you fit the black top head to a 90 bhp vtr engine?(grey top)

[AlexB]

I do believe you can yes
few different sensors about it but should be fine I think

[blackie_2k5]

yeah? do you know if its much of a job?

[blackie_2k5]

also will my inlet and etc bolt straight on? jus tryin to think whether it will be worth it?

[frankie]

if its an early silver top head, then the inlet manifold will be straight swap

[blackie_2k5]

does anyone know what would be involved in the changeover, eg what i would need to add or remove or modify? it is an early grey top

[frankie]

not alot mate.

may need to change a few sensors tis about all

[blackie_2k5]

sensors on the mk1 head? or change the plugs on my loom? will it run ok and idle corect etc with my original set up? if this is the case whats the diffrence between the early grey tops and the black top engines? and my rocker cover should fit the black top head yeah?

[AXracing]

Black top heads have a different combustion chamber shape with a smaller volume.

The black top have a very different cam profile, Different rockers setup and harder valve springs.

I don't recall off hand the cam bearing sizes in the early grey top but there is a possibility you cant swap the cam from one to another.

Come to think of it there were different pulley sizes on some TU engines as well so its worth checking if your planning to swap them to.

Sorry its been years since I have even looked at a early grey top engine.

[blackie_2k5]

well the head im looking at already has cam and valve springs etc? just needs a pulley and rocker cover i beleive, and any sensors do you know what engines/heads wont fit together? or anyone know for that matter?

mine is a 2000 mk2

[blackie_2k5]

tryin to find out what numbers or markings the head iim loking at has but i think it has 2j2 stamped on it if that will help anyone identify?

[blackie_2k5]

Black top heads have a different combustion chamber shape with a smaller volume.

The black top have a very different cam profile, Different rockers setup and harder valve springs.

I don't recall off hand the cam bearing sizes in the early grey top but there is a possibility you cant swap the cam from one to another.

Come to think of it there were different pulley sizes on some TU engines as well so its worth checking if your planning to swap them to.

Sorry its been years since I have even looked at a early grey top engine.

so if i used the head and cam and rocker set up etc from the blacktop with my grey top pulley and cambelt etc would this be useable? also will my rocker cover fit the blacktop head?

[blackie_2k5]

anyone help?

[blackie_2k5]

anyone at all?

[blackie_2k5]

surely someone must know? its startin to get my head done in lol

[blackie_2k5]

.bump!

[Sparco_Tom]

the rocker covers will swap over mate. im not soo sure about the cambelt and pulley. i have all 3 parts spare if you need to buy them

[JamesR]

what will be the advantage of this swap?

[blackie_2k5]

not so much an advantage just i know where i can get my hands on sum cheap cams and etc brand new but there for a blacktop

cheers for the input so far but any defo answers would be much appreciated, and cheers sparco tom if i need them i'll be in touch

[blackie_2k5]

been looking at pics of mk 1 and mk2 90bhp engines and they look like it could be done, obviousley i wnt no for certain till i can get them together and compare, does anyone know of anyone whos tried this? really dont want to be ripping apart my engine to find it wont fit run and have to do it over again?

[blackie_2k5]

rite, managed to get some numbers of the mk1 head if this will help anyone help me lol 9616169410 2J2, 27/10 and 93 5