ATTENTION all Speedvision Headgasket users!

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Kelly

Kelly

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Gee said:
Speedvision - What make are you gaskets, are we allowed to know?

It seems like some of the problems people are having could well be down to application and installation. Maybe not the gasket itself..but we will probably never know.

Saying the Speedvision gasket is simply not up to the job seems weird, especially when only running 0.9bar on a TD04L, as SV has advised it is being used on other cars running a lot more power in hotter climates. I don't have any reason to go against his word either.

Well, touch would that my gasket is OK. Has been a few months and probably a few thousand miles by now and I am having no problems. Done a QTR mile day too and the car is driven everyday so seems weird. Maybe they are hit and miss?

Speedvision - Is there an actual documented max recommendation for these gaskets?
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Well Sam mentioned to me in a PM someone use make gaskets for him and now he makes them himself maybe that cross over has something to do with it?
 
A

Adam_Glanza

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i think if we outweigh the fails / ones still going

the still goings are still alot more.

the problem is gaskets getting sent halfway across the world can get bent etc so could cause problems?
 
weeJohn

weeJohn

Lifer
As Sam posted I have had a failed SV gasket and a failed Zep gasket. Both went the same way after boost was raised above 1.4 bar. I run a TD04H turbo.

New bolts were used each time and no sealant on the head. Bolts were torqued to Toyota specs. On advice from a friend, before removing the Zep gasket I retorqued the bolts after backing off the tension on them. It made no difference. I could see where gasses were passing from cylinder to cylinder and cylinder to waterways across the gasket.

The head and deck were checked for flatness each time, cleaned with thinners and the head was skimmed before the first SV gasket was fitted.

I have never measured the bolts for stretch, very hard to do as I believe you would need to have a measurement of each bolt before fitting, then after torqueing and then after removal after failure.

I honestly believe that my failures were due to running to much boost pressure. My last gasket is on 2 months and I have never ran above 1.3 bar and have had no problems.

A lot of people get water pushed out of their cooling system and immediately blame the head gasket. A sniffer test will show CO in the coolant. But at the intake manifold, there is an open waterway on the head beside the intake ports. This is sealed off by the intake manifold gasket. In theory, boost pressure could leak across the INTAKE GASKET into the cooling system at this point, if the seal is not good. This air in the coolant system would not have been burnt, so no CO would be present, rendering a sniffer test useless.

We have all got bogged down with headgaskets lately, maybe is this another area we should be looking at???
 
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Kelly

Kelly

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Some pics of the speedvision HG that has come out today! Its actually cracked/split between and was blowing on the others and about to crack somewhere else too.

03052008197.jpg


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sx_turbo

sx_turbo

Lifer
sometimes that can be caused by excessive heat in the cylinders, and so the gasket blows at the weakest point, i.e between the cylinders.

my mates mini done the same thing. once it was tuned properly his problems stopped.

i am not saying that is the cause, im saying its a possibility.

the same as to much boost could be a possibility
 
Kelly

Kelly

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sx_turbo said:
sometimes that can be caused by excessive heat in the cylinders, and so the gasket blows at the weakest point, i.e between the cylinders.

my mates mini done the same thing. once it was tuned properly his problems stopped.

i am not saying that is the cause, im saying its a possibility.

the same as to much boost could be a possibility
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The standard one didnt break between the cylinders.

Well id like know what boost is safe for some of these gaskets as Nicks only run 1bar and was blowing.
 
S

steveep82

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yeah but then ther are others like me, gee and wayne running 1.2-1.5 bar on td04s with no problems, that hg looks wrecked!
 
Kelly

Kelly

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steveep82 said:
yeah but then ther are others like me, gee and wayne running 1.2-1.5 bar on td04s with no problems, that hg looks wrecked!
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Yes i know thats why i said some.

Also my point above maybe the change in "production" is an issue? As you and Gee have had yours awhile now havent you? Whereas we only bought ours late last yr. Also Nick and Mossy havent had theirs that long.

Yeh fucked is right!
 
TurboDave

TurboDave

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tbh and open minded, from personal experience I have never found a standard HG to be blown so badly between cylinders even after years of use, if it was cracked so badly as standard from little use idd be very concernered indeed.
 
goldenvtr

goldenvtr

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daveburwash said:
I have seen gaskets flame cut like that with det on flat top pistons as they flame is right on the gasket line. With dished pistons in tends to be better
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Thats something to concider im running dished pistons too.

If this is caused by Det maybe try a diffrent tuner?
 
TurboDave

TurboDave

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daveburwash said:
Would be interesting to know what pistons the people with problems were running
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Dave I know you know your Starlets a lot better than most people, and I have the upmost respect but, I am hesitant to say any more, because you seem to be holding back on saying any more....

:)

Dave
 
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