Yep first day out with the cossie yesterday and boom, blew the headgasket and radiator apart, Ive taken a few pics of the gasket and also the block, the closer pic of the block is where i laid a straight edge acorss it and i could get a 2thou feeler gauge under it so am i right in thinking the block needs decking to be perfect for a multi layer gasket?

The head is currently with the machine shop for a light skim and pressure test as when i replaced the gasket with a YB1261 about 15 miles ago the coolant sytsem seemed slightly pressurised just with it ticking over, now obviously this could be down to a cracker head or just the fact the block and head arnt completely flat ?

My dilema is that after spending all this time and effort on the car what do i do if it needs a new head as ive spent enough on it already, at the moment its just a skim, block decked and build back up with some new gaskets etc so im happy to do that but dont know if i can justify the cost of a new head ?

Now i know its my fault really it went yesterday for using the normal gasket over a multilayer with a GT30 but people said on here that they use group a etc up to like 400 bhp but obviously not in my case, but on a good note christ it was bloody fast

resto:https://passionford.com/forum/restor...om-fitted.html

 

Shit mate not good did you ever get it mapped for the gt30?

 

You may get away with 2 thou with an MLS gasket but tbh its a gamble, I bet when you get the block skimmed it will be more like 4-5thou out in the middle. As its 2wd and easy to have the bottom end out quickly I'd have the deck faced, at least you will know its right. You can then get some valve cut outs machined in your pistons at the same time.

 

No mate, it done 15 miles and let go, i was gonna have it on the dyno to check fueling etc and if it was ok i was gonna use it for this show season and then save up for the map and new ecu from mark shead.

 

Well thanks for replying Martin its nice to get a reply from a reputable tuner so you know whats what, ill just wait on the news back about the head as its not in a good way to be honest, 1 slight crack in a strange place, sort of in the middle of the head face nearish valve seat and the flat area? how much to have the pistons done roughly ?

 

Thats a cunt mate ! hang in there tho

 

Nevermind, theses things are sent to test us!

 

bust it !!


sell me your gt30 cheap


stick in there fella, , still got a month or two before the show season breaks , so a bit of time to sort the niggles

 

Nightmare mate. Its only money mate get it spent fella. Just get another head bought. The car is too good to brake.

 

With a GT3071 on the wrong set up would pop the gasket very quickly, I would recomend decking the block and dropping valve pockets in the pistons.

Mark

 

Shit luck mate!!

Hope you get it sorted!!

 

This is something i have been looking into with regards to pistons, the turbo was boosting around 30psi when i had the car out, would you say the gasket i used just wasnt man enough for the job and also with the 2thou discrepency on the block, If the news comes back good about the head i will have the bock decked and use a multi layer steel gasket, by doing this i take it the chances of it doing this again with the said boost it was running should be fine if fueling is ok etc ?

 

Gutted for you mate. Keep on truckin though

 

I would guess a couple of big spikes of dett and a sub standard gasket let go, A correctly mapped one may have made the gasket last a while.

Mark

 

Well cheers for your info Mark, ill take on board your advice and i will bring the car to motorworx for a dyno run to check fueling and dett as its only 20 mins away from me and possibly twist your ear with the results.

 

Unless you have a chip to suit your spec dont bother running it.

Mark

 

The current chip was to suit a t35 .55 with grey injectors @ 30psi, would this chip not be useable at all then i take it ?

 

No it is not useable.

Mark

 

tow it to martin or mark......or have stu msd send u a matching chip as a starting point. job jobbed.

 

Well i think my plan of attack will be to wait on the news about if my head is repairable etc then if so i will remove the block and have it decked, pocket the pistons and then re-assemble. I spoke to martin today and he mentioned about mapping it on its current l6 ecu for a good price so i think i might do that and he's only in birmingham which isnt far for me, i was gonna go new ecu etc but i dont think funds will allow now after whats happened.

 

martin is a very wise choice, you will be well chuffed.

 

I hope so mate.

 

Gutting mate. Hope you get good news about the head, lovely car so dont give up just yet lol

 

i know so im just havin a hard time with his accent...brummies, almost as bad as scotts....lol

 

 

Nice one mate dont give up. Just think when its all done you wont have to worry about it. Just get the money spent mate.

 

Had some good news today the head has been skimmed and pressure tested and all is fine , it wasnt a crack in the end just a mark so at least i know that part is 100% ok, block out next for a skim then new multi layer from reyland with bolts, should be running again shortly!!

 

Good news then !

 

Wheres your gasket gone?
Wheres your gasket gone?
Wheres your gasket gone?
Wheres your gasket gone?
See if you can do more than 14miles this time before it kills itself again!

 

So gutted for you mate, terrible news But if you took it out and had it up at 2bar with a map for T34 and greys you're mad, and are lucky thats the only damage

 

Snap.

At least your head is OK

Im only on a GrpA H/G with 2.2bar boost and its still going.

Steve

 

I know I know

Block out thursday and off to be decked, pistons pocketed then all back together, then off to see Reyland hopefully.

James, only gave it one tiny bit at 30psi so i cant believe it can cause that in an instant (not that im a mapper serious question), i reckon its mainly the fact the head and block wasnt flat, head was 6thou out and block is expected to be around 5thou?

It was running 32 spike and holding 30 on a t35 producing 350bhp so can a higher flowing turbo cause that so quickly?

 

Paul,

I'm sure it could do that, as Mark has lead to saying above. Quite often more damage is done at part throttle 2bar on a T34 is a lot less air flow than 2bar on a GT30!

At least now you'll have a better spec engine though

 

Christ mate i didnt think you would have ran it with a chip for a t34 no offence i thought you would have knew better ! If only we could all bolt a gt30 on & away we go

 

Lol, it didnt happen like that, it was a case of not driving it for 18 months and friday had some good weather so i took it out round the block to check noises from all the parts i'd had apart, but yeah on the way back i got carried away and put my foot down a bit more than i should so my hands are up there, i do know better but it was just the noise etc i couldnt help it

 

it would be something you'd see clarkson doing

 

i would most likley done the same mate ! so this might be a blessing in disguise least it will be done properly now

 

Your right there james, should be a scream when set up right aswell

Thats it mate was gutted friday but now im excited in getting it done

 

Definitely mate

 

Love the honesty.