Head gasket coolant mod?
03-07-2019, 01:08 PM
#16
If I remember when I get home I will post photos of the head gaskets I have.
What do I have?
1. stock gasket for 2.5 L
2. Wide fire gasket
3 cometic gasket for my 3.0L modified 2V head for my 3.0L
1 stock 2V head
1 o-ringed head LR level 2 2V head
1 modified??? 2V head from the RAGE2 car
1 Michael Mount modified 2V head
1 LR level 3 2V head for 3.0L
Not sure if that will help anyone out but it can be some reference photos
Also there are 2 versions of cometic 2V head gaskets if you research a post by refresh951 regarding a newer version.
There is also a very nice head gasket that Duke had made for his car if one searches for his posts.
What do I have?
1. stock gasket for 2.5 L
2. Wide fire gasket
3 cometic gasket for my 3.0L modified 2V head for my 3.0L
1 stock 2V head
1 o-ringed head LR level 2 2V head
1 modified??? 2V head from the RAGE2 car
1 Michael Mount modified 2V head
1 LR level 3 2V head for 3.0L
Not sure if that will help anyone out but it can be some reference photos
Also there are 2 versions of cometic 2V head gaskets if you research a post by refresh951 regarding a newer version.
There is also a very nice head gasket that Duke had made for his car if one searches for his posts.
03-07-2019, 02:19 PM
#18
Three Wheelin'
look at a 944 head, then the gasket.
lots of holes are 'blocked' by the gasket, only flowing up through the gasket behind #4 cylinder.
i cannot say with certainty what LR does as their coolant mod, which is different than the steam vent kit, but i speculate it is opening up some of those blocked holes.
lots of holes are 'blocked' by the gasket, only flowing up through the gasket behind #4 cylinder.
i cannot say with certainty what LR does as their coolant mod, which is different than the steam vent kit, but i speculate it is opening up some of those blocked holes.
Is there room for improvement? Probably. I just wanted to clarify that Porsche did not intend for each hole in the head to be used for coolant flow.
03-07-2019, 02:39 PM
#19
Nordschleife Master
Originally Posted by 968to986
...Wait, what? People use the phone to call each other? 
Yeah, calling was next on my list, I just wanted to see if people had first hand experience...
Yeah, calling was next on my list, I just wanted to see if people had first hand experience...
Originally Posted by zmf
IF you get around to calling LR, please post their response. But I know what you mean about verbal communication. 
03-07-2019, 06:17 PM
#20
Not much to add, but after talking with the shop working on my 951, they said that LR said that indeed more ports were open in their cometic head gasket than on the OEM gasket, and that they were also aware of and avoiding possible conflicting coolant flow issues.
They promised pix of the modified cometic for comparison with OEM, which I will post if someone hasn't already done so.
They promised pix of the modified cometic for comparison with OEM, which I will post if someone hasn't already done so.
03-07-2019, 10:48 PM
#21
Rennlist Member
Really, then why are the majority of head gasket failures at the #4 cylinder? The problem continued into the 3.0 L engines as well.
03-07-2019, 11:50 PM
#22
Racer
Thread Starter
IF you get around to calling LR, please post their response. But I know what you mean about verbal communication.
What I'm hearing seems to suggest that the head gaskets sold by LR are indeed specific to 951's, as opposed to generic gaskets that require modification for use in 951's. That they are copies of OEM gaskets. But they might (or might not) be improved if more ports were exposed.
When do we get to the easy, straightforward stuff??
What I'm hearing seems to suggest that the head gaskets sold by LR are indeed specific to 951's, as opposed to generic gaskets that require modification for use in 951's. That they are copies of OEM gaskets. But they might (or might not) be improved if more ports were exposed.
When do we get to the easy, straightforward stuff??
The easy, straightforward stuff...on a 951? Probably never. I mean even when it’s running great, driving it well is still not easy and straightforward. That’s why I keep coming back for more!
03-08-2019, 08:45 AM
#23
The head gasket is used to control where coolant is introduced into the head and overall flow rate through the block/head when the thermostat is open. Having the flow through point at cylinder #4 is so the coolant is routed past all of the cylinder bores then past all of the combustion chambers before flowing out the front of the engine. Adding holes closer to the front of the engine will allow coolant to short cycle through the block/head and not pick up as much heat.
03-08-2019, 05:43 PM
#24
Three Wheelin'
03-09-2019, 10:19 AM
#26
Drifting
03-10-2019, 12:36 AM
#27
Rennlist Member
03-10-2019, 08:24 AM
#28
Drifting
03-10-2019, 08:57 PM
#29
Rennlist Member
I bought my 85-1/2 new. I owned it 6 months driving around Houston, nothing more than spirited driving occasionally, got to replace the head gasket for the first time. When Porsche replaced it for the 3rd time in 2 years, I was a little upset with the HG failures. This is when they told me that the 944 2.5 liter really did not like real hot climates and had difficulty in maintaining a uniform temperature in the block. This was a bare bones stock NA engine. So no they did not know what they were doing.