head gasket fail
Turbo Mini Forums

well my head gasket went when jon betts was suppose to be coming tomoz (bad times)

well gutted, its just leaking some coolent into #3, hopefully il swap the gasket Saturday and all will be well.

is a cometic worth while over a bk450?

13.95 1/4 mile on a 2.95 fd. Carnt be that hard to beat!

Stick to the 450

rick

cheers will get 1 tomoz £20 for a genuine payen turbo head set (bargain)

13.95 1/4 mile on a 2.95 fd. Carnt be that hard to beat!

make sure you are using a corrctley calibrated wrench. and tourqe the gasket to 55 ft pounds final load.

tourquein 2 stages to say 35 ft pounds then 55 the final

Spot on about the calibration steve :)
As for 55 ft I wouldn't go that high as you run the rist of cracking the fire rings! as T3 knows all about.

Best 1/4 mile 13.2 seconds @116 mph
First 5 port miniturbo to make over 200 bhp on a carb?
First 5 port miniturbo to make over 200 bhp on Injection?

http://www.mattwoodsphotography.com

I agree with Matt,

Also if you are using arp's or any kind of special lube the torque will need to be different.

whats the torque for arp's on oil joe ?

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

We have minispares 11 stud kit on the van and using arp lube we have these torqued to 45ft/lb's

If something is worth doing, it's worth doing half of.

that could be my issue, i seem to think i torqued it to 65. Thanks all

13.95 1/4 mile on a 2.95 fd. Carnt be that hard to beat!

I have always gone to 30ft lbs lbs then to 55ft lbs. With a bk450 and had no problems at 18psi

Audi s4 b5 - 470bhp & 486ft lbs

On 30th Apr, 2012 Brett said:
yeah stick the bit in and give it a wobble

Robert, you can use the std arp torque setting but you need to bring them up to torque and release them several times (like 6-10).

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

moved to tech section as i have questions

13.95 1/4 mile on a 2.95 fd. Carnt be that hard to beat!

Well good job you have found the reason Eden, that's always a good thing :)

Best 1/4 mile 13.2 seconds @116 mph
First 5 port miniturbo to make over 200 bhp on a carb?
First 5 port miniturbo to make over 200 bhp on Injection?

http://www.mattwoodsphotography.com

yes matt defiantly learn from mistakes!

just gota re-arrange the shoot, ive asked jon if it can be doneat pod next weekend.

13.95 1/4 mile on a 2.95 fd. Carnt be that hard to beat!

LOL.

I think know what your driving at robert,

but the long an short answer there isnt one, depends on what oil, but if I was pressed for an opinion I would use 45lb as I belive there are more gasket issues from over torquing than under torquing.

Talking of over torquing.... how many of you fit your head nuts dry? none I'll bet, or worse install some of them oily (uder the rocker cover) and some dry (the other 5 or 7) the Std tourques in the manual are for dry bolts, which i dont think many people realize.

Ive looked at this a bit recently after looking at a gasket faliure on oneeyedlizlards car, IMO the gasked failed due to over torquing, he was using the 55ftlb on ARP's, at a guestimate that must be similar to doing the std bolts to about 70 ftlb.

Ive had a fiddle with simple bolt torque calcs, but cant get them to stack up satifactorally, as even a slight change in friction coeficients makes a huge difference, far more than expected, for example assuming the 55 flb std is dry, changing it for an oiled bolt gives a required torque of under 30 ftlb.

Also another thought on head torques, if you have a washer under the head nut, this will alter the clamping due to the friction between the nut and its steel washer being diferent to the nut against the head,

there you go, a load of words with no real conclusion LOL

ok, so ive put it all back together and it looks like i have the same problem.

rele annoyed with it now and to top it off the brakes are pulling too. not looking good for mitp

13.95 1/4 mile on a 2.95 fd. Carnt be that hard to beat!

Are the block and head surfaces known to be nice and true?
Just for the record my only bk450 head gasket failure was at 8psi back in the day due to a fire ring being clamped too hard and spliting. Now using minispares head studs/nuts (9 stud) oiled and torqued to 40lbft and 18psi with no issues.

Edited by T3Tone on 7th Aug, 2011.

-MINI CLUBMAN 1380 TURBO-

I,m nowhere near as well informed/experienced/educated as some of the contributors on here but I use standard studs ,oiled, and at least 65lbs ft on all 11 studs.
So far so good with up to 17psi.

I hadn,t a clue that overtightening could do anything to the gasket that mattered, although I do understand that you might distort the head and/or deck if you were unlucky.

I use uprated and standard studs, depending on which engine I'm on about. In all cases I use 68Nm.

The only failures that I have had (other than det related) are under or over torquing.

Interesting one of the things that I found with the SC head is that there was a slight compression to the head under the washers, this obviously releaded the head gasket slightly and was one reason why I had a slight presurising of the water system.

I NEVER re-torque. BUT it may be required with the alloy head.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

I use the minispares uprated head bolt kit that comes with chamfered thick washers, I do them up in two stages with engine oil I go to 25 then 45lbs. this was following a minispares article that said they run them at 45...

They did state aftre X number of times you had to replace the nuts... never noticed.

Like Wil I never re-torque.

They seem to work.

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!

well its never got close to overheating since the build. had head and skimmed block. so im 99.9% sure there true.

im now thinking it must be a crack in the head as the block is mint and the head did have a crack elsewhere on it.

13.95 1/4 mile on a 2.95 fd. Carnt be that hard to beat!