VR Cylinder Head - Dimensions

[BILLCOR 1]

Car is in the garage just now, they have put it back together, refurbed head with new tappets etc, new plugs and leads, it is misfiring when revved and there is a chapping noise, it seems to sort itself out when left to idle, but there's still the chapping noise, any ideas guys???

[Lee1873 0]

Nightmare Bill :(

Could be any number of things really, dodgy tappet, cam sensor or trigger, timing or even the coil pack(if it has one), my own VR was missing a little when I got it & a new cam sensor sorted it, I didnt have any knocking although it did "pink" badly under load & was lumpy on idle, Is the work being done @ our local "friendly fife specialists"?

 

Hope you get sorted easy enough.....

[Wullie 1]

Exhaust manifolds etc tightened up? Can give a right sharp crack that sounds as if the engine is aboute to explode if you have a loose bolt

[BILLCOR 1]

Nightmare Bill :(

Could be any number of things really, dodgy tappet, cam sensor or trigger, timing or even the coil pack(if it has one), my own VR was missing a little when I got it & a new cam sensor sorted it, I didnt have any knocking although it did "pink" badly under load & was lumpy on idle, Is the work being done @ our local "friendly fife specialists"?

 

Hope you get sorted easy enough.....

 

Yep its at Star, been down this afternoon, misfire and tapping only when revved, they are thinking oil pressure problem, gonna check all that now, tappets are all new, no coil pack, I told them to through a match at it :bonk:

I should have left it in the lock-up and saved my cash :bad-words:

[stevej 0]

Sorry, cant offer any constructive comments Bill, just hope it tuns out a straightforward fix given whats already been done.

[BILLCOR 1]

Sorry, cant offer any constructive comments Bill, just hope it tuns out a straightforward fix given whats already been done.

 

Aye, cheers Steve, thought it was all straight forward, just change over to the refurbed head and off we go, but hey, its a Corrado :nuts:

[stevej 0]

Hey Bill, just wondering how things were going with the C ?

[BILLCOR 1]

Hey Bill, just wondering how things were going with the C ?

 

Still waiting Steve, Jim is on holiday this week, so its just Brian and one other guy, he was gonna run some tests later yesterday, so hopefully will hear today :shrug: Was hoping to have it back for Kames at the weekend, you going?

[andy 0]

Obviously their proirity is to sort the misfire out. You need the thing to be running properly before you can comment on any other strange noises. One thing worth noting is that new tappets are noisy generally. They will chatter for a while, there is normally a running in period, ie so many thousand revs for several minutes, then they settle down a bit. I'm not sure that is your problem though, not quite sure what 'chapping' is. :)

[BILLCOR 1]

Obviously their proirity is to sort the misfire out. You need the thing to be running properly before you can comment on any other strange noises. One thing worth noting is that new tappets are noisy generally. They will chatter for a while, there is normally a running in period, ie so many thousand revs for several minutes, then they settle down a bit. I'm not sure that is your problem though, not quite sure what 'chapping' is. :)

 

It is a top end chatter, pretty much disappears when idling, they have now done oil pressure tests and all is fine, now talking about taking the head off again :brickwall:

[andy 0]

Have you run the tappets in, as I described. It honestly makes the world of difference. I cringed when I put new tappets in a few years ago, it sounded awful. Then I read about running them at raised revs for a few mins and it went silent.

[BILLCOR 1]

Have you run the tappets in, as I described. It honestly makes the world of difference. I cringed when I put new tappets in a few years ago, it sounded awful. Then I read about running them at raised revs for a few mins and it went silent.

 

The car is in at Star Performance EDIT: they are aware of this as I have just called them

[coullstar 0]

The head was quiet when I had it. Could it have been something that Agra did? Did they put in new tappets etc?

[BILLCOR 1]

The head was quiet when I had it. Could it have been something that Agra did? Did they put in new tappets etc?

 

Could well be Agra's fault Greame, they did not use new tappets as they thought all was well, when the head was swapped over, the chattering noise appeared, Brian at Star reckoned it was a tappet, so I told them to replace the lot with new, still chattering, it may be that the head has been skimmed to much, this is what they are now going to check, although dealing with a company with Agra's rep, you would have thought they would have checked everything was within the tolerances before going ahead and skimming, I'm only a P&D, so I dont know

:shrug:

[stevej 0]

Hey Bill, just wondering how things were going with the C ?

 

Still waiting Steve, Jim is on holiday this week, so its just Brian and one other guy, he was gonna run some tests later yesterday, so hopefully will hear today :shrug: Was hoping to have it back for Kames at the weekend, you going?

 

Nightmare Bill, sounds like the are progressing through the list of likley causes. Hopefully they will get there soon.

 

Cant make it at the W/E on call. Shame looks as though it would be good. Did a wander round at Biggar last Sunday. Can't get the raddo out just now as although it got its MOT last week, it has no tax or insurance (+ a brake fluid leak after new rear flexis last week for its MOT!)

[stevej 0]

you get her fixed yet bill ?

[BILLCOR 1]

you get her fixed yet bill ?

 

Nope :sleeping:

 

Jims on hols until Sunday, so its just Brian and the other guy, I told Brian to get to as soon as he could as he's pretty pushed just now, but I'm in no real hurry, heads to come back of to see exactly whats going on, pretty sure its oil starvation to the head, we shall see :wave:

[Lee1873 0]

you get her fixed yet bill ?

 

Ive got a couple of heads lying Bill if it turns out to be a head issue :thumb right:

[BILLCOR 1]

you get her fixed yet bill ?

 

Ive got a couple of heads lying Bill if it turns out to be a head issue :thumb right:

 

The head was a spare Lee, so I have the one that came of my car if need be, thanks for the offer though mate :salute:

[BILLCOR 1]

Can anybody tell me the factory thickness of a Vr Head, are they all the same and what would be the minimum thickness allowed

[Lee1873 0]

Hi Bill, not sure what factory spec. is/was but the information I have regards tolerance is as follows:-

The maximum head distortion is 0.1mm

Minumum cylinder head height 139.5mm

[BILLCOR 1]

Hi Bill, not sure what factory spec. is/was but the information I have regards tolerance is as follows:-

The maximum head distortion is 0.1mm

Minumum cylinder head height 139.5mm

 

Yeah, cheers Lee, had a look in the Bentley manual and found it, the saga continues :sleeping:

[Fanjita 1]

Bill sorry to intrude but I couldn't help but notice Graeme mentioning the head?

 

Was this from the 12v on the green one (ending BPN) before he converted it to the 24v engine?

[BILLCOR 1]

Bill sorry to intrude but I couldn't help but notice Graeme mentioning the head?

 

Was this from the 12v on the green one (ending BPN) before he converted it to the 24v engine?

 

Yes, why ??

[Fanjita 1]

I fitted that head myself to BPN before I sold the car to Graeme, it was skimmed and polished at the time. That was only a few years ago I'm just surprised you've done it again?