A CYLINDER HEAD FOR 105STEVE

[Col-ashtonmobile]

A couple of weeks ago 105steve on here asked us to refurb his crossflow head and give him some more power,

bring it over Steve we,ll gladly do it i said , so he drops it off

straight in the degreasing tank for this one

so out of the tank and time to check it over , remove the valves and lets give it lacqur crack test ,

hmmm sorry Steve 4 cracks ,1 really nasty , let me look in our parts department (my shed ) see what i got to help him out with and as i thought a nice head for him needs refurb but saves us hunting another,

so first up is clean and a surface skim

now Steves old valves cant be used as the stem sizes are different , so lets get porting whilst Joe sorts some new valves as he,s finished his daily work early

all looking good there , now i know i already previously fitted unleaded seats so just need to re cut

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all done time to grind the valves in now

all done and looking good

seals and springs next

and i pinned and matched his manifold if you look closley you can see the pins either end

new studs and big bore exhaust gaskets

and a phone call today to Steve to say its ready and lucky enough its his day off tomorrow so coming over to collect , i also supplied him with a new head gasket , happy days ,

now i,m going to reface his old valves and keep them as they are in good condition for another head that needs bigger guides

hope you liked that insight to a head overhaul , call us if you would like yours done

[Vista]

very nice Col.

 

It may be the way the light is shining on them but the old valve in the last photo appears to have a flat face whereas the new ones are slightly concave. Can you tell me what the difference is please?

[Col-ashtonmobile]

Well Scott as far as i know it was for weight saving , those domed faced valves weigh less than the flat ones and to achieve this they take material off the face with the minimum loss of c/r , that,s what i think but i may be wrong

[Vista]

I thought maybe you'd scalloped them to adjust the compression ratio or something but they come new like that? Are all new X -flow valves like that or just that particular manufacturer?

[Col-ashtonmobile]

Well Scott i,ve got 3 sets of crossflow valves in the workshop and all have different base,s , i think it is down to manufacturer but i,ll get this confirmed cos as i said to be honest i,m not 100% sure , i did a Renault Clio before xmas with cambelt failure that needed 3 valves and the new ones that were supplied by the motor factors we use had different base,s to the original,s but when all assembled and refitted ran perfect

[zetecmk2]

go on the steve!!

everybody needs new head every now and again!!

stainless manifold getting matched?

[Col-ashtonmobile]

go on the steve!!

everybody needs new head every now and again!!

stainless manifold getting matched?

yes Glen manifold port & head all the same

[105E Steve]

Cheers Col, I am well happy with what you've done, looking forward to getting it fitted this weekend. I took your advice and polished the manifold up and it looks the business, I'll get some pic up soon.

I'd recommend you guys overtime

[BaileyMex]

But have you started her up yet??

 

[zetecmk2]

waiting.........