Turbo Whistle/squeal

wammers · Jul 9, 2014

wofforduk said:
After having this guy not turning up, and starting to desperately need the car back on the road, i am going to have a go at removing them myself. if i really bugger it up, theres a recon head on ebay (skimmed - valves ground ect) for £150 so now im not too concearned. want to avoid a head off situation at all costs tho - as dont want to touch the timing.

Will look into getting a bush to drill them out straight, will try an easy out but very highly doubt that will work as the others were serious sodds to shift (3ft extension bar). maybe by drilling the core out it may release some tension, and the drill might warm it all up a little but im not very hopeful on this one. one way to find out i spose!

A sharp drill should not warm them at all. That is why i stipulated Cobalt drills used at low speed applying high pressure. Depending on their metalic make up using anything else could work harden them and you will never drill them out. An high drilling speed and ****e drills will get you in all kinds of trouble.

wofforduk · Jul 10, 2014

Bought some proper cobalt drills yesterday, borrowed an angle drill and went for it. Seems to have worked, couldnt get all the old stud out but it tapped up back to 8mm fine, so sod it!

Milled up the manufold, and now all sorta fits together! will see if it holds up over time.

interesting you mention the heads shouldnt be skimmed? new manufactuing for us, seems like throw away parts are creeping in....

wammers · Jul 10, 2014

wofforduk said:
Bought some proper cobalt drills yesterday, borrowed an angle drill and went for it. Seems to have worked, couldnt get all the old stud out but it tapped up back to 8mm fine, so sod it! Milled up the manufold, and now all sorta fits together! will see if it holds up over time.

interesting you mention the heads shouldnt be skimmed? new manufactuing for us, seems like throw away parts are creeping in....

They certainly should not be on the M51 to cure a warp. I have no manuals for your engine don't think it would have been me that said that, but cannot think it does not also apply to your engine.

Saint.V8 · Jul 10, 2014

Saint.V8 said:
According to BMW the M57 heads should not be skimmed....this is in the BMW TIS

wammers said:
They certainly should not be on the M51 to cure a warp. I have no manuals for your engine don't think it would have been me that said that, but cannot think it does not also apply to your engine.

As above Tony....are my posts invisible???

2.0_hippo · Jul 10, 2014

:whoosh:

wammers · Jul 10, 2014

Saint.V8 said:
As above Tony....are my posts invisible???

No Ant they are not. But OP attributed it to me. Maybe a should just have said it was not me must have been some other learned fellow. I did not recall who said it and did not re read the thread.

Turbo Whistle/squeal

wammers

No longer with us, RIP

wofforduk

New Member

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wammers

No longer with us, RIP

Saint.V8

Dyed-in-the-wool 100% RR Junkie

2.0_hippo

Well-Known Member

wammers

No longer with us, RIP

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