P-gasket and exhaust manifold - Defender Source
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  #1  
Old September 24th, 2016, 11:11 AM
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P-gasket and exhaust manifold

New leaks on the 300tdi. Looks to me like it's the p-gasket and then the exhaust manifold. Any other gaskets I should order or consider while I am doing this? I know water pump gasket and the plug next to the p-gasket.

Also, it seems like this gets me halfway to a timing belt change. Is that an accurate assumption?

Planning to clean all the hoses for the intercooler/turbo while I have it this far apart. I'm beginning to think my turbo is failing- oil in the pipes, exhaust manifold leaking, decrease in power, black smoke is slowly increasing.
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  #2  
Old September 24th, 2016, 01:03 PM
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Really the timing belt is pretty separate from all of the water pump stuff. You will be removing the fan, fan shroud, and upper hose which they have in common. But you have to deal with crank pulley removal. If you don't have to special tool to immobilize the crank it's a big pain. If you are doing it consider buying new genuine front main and camshaft seals and take care of those while you are in there.
I used some hylomar spray on my p gasket and its hasn't leaked. Granted I don't have many miles on it.
Good post here: 300TDI p gasket - Land Rover Technical Archive - LR4x4 - The Land Rover Forum
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  #3  
Old September 28th, 2016, 04:33 PM
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Thanks for the write up, I'll save the timing belt for another day.

With all these newly acquired leaks, I'm wondering if she's trying to tell me about a bigger issue. I wouldn't consider these old or worn out, they were all replaced 15-20k miles ago.

What causes the p-gasket and exhaust gasket to fail? I have another oil gasket leaking on the other side of the motor too. It seems like she went from finally not leaking to having these little leaks everywhere.

Alex
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  #4  
Old October 1st, 2016, 09:49 AM
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I can't get the exhaust manifold off. I have removed all the nuts and hit it with a rubber mallet. It's fused on with the gasket. I remove nuts for the exhaust down pipe too and nothing. Doesn't budge.

Ideas?
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  #5  
Old October 3rd, 2016, 02:17 PM
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Yamaha makes a gasket sealer for sever vibration applications, that's what i used on my P gasket 3 years ago and it's still fine.
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Old October 3rd, 2016, 02:22 PM
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Quote:
Originally Posted by aosias View Post
I can't get the exhaust manifold off. I have removed all the nuts and hit it with a rubber mallet. It's fused on with the gasket. I remove nuts for the exhaust down pipe too and nothing. Doesn't budge.

Ideas?
Look again.
You probably missed something like one of the bolts.
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  #7  
Old October 3rd, 2016, 02:38 PM
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Quote:
Originally Posted by aosias View Post
I can't get the exhaust manifold off. I have removed all the nuts and hit it with a rubber mallet. It's fused on with the gasket. I remove nuts for the exhaust down pipe too and nothing. Doesn't budge.

Ideas?
How many nuts did you remove?
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  #8  
Old October 3rd, 2016, 04:09 PM
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Gasket arrived...I see where I am have one nut left...

Am I going to regret installing a Britpart P-gasket?
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  #9  
Old October 3rd, 2016, 06:52 PM
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While your manifold is off you may want to consider tapping it for an EGT sensor, easiest way to keep the filings out of the turbo. Can plug it for the time being but if any tuning is in your future it's nice to have.
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  #10  
Old October 4th, 2016, 03:07 PM
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I have the p-gasket exposed and there is a lot of black silicone or gasket stuff. Do I need to add all this when I do the new one or just scrape it all off to bare metal and then use the new metal gasket?

I have a new freeze plug I can install but this one looks good and like it hasn't been leaking. Is it ok to leave well enough alone or will I regret that?
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  #11  
Old October 4th, 2016, 03:24 PM
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I use a razorblade scraper and then a scotchbrite pad to clean things up.
I'd leave that freeze plug alone.
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  #12  
Old October 4th, 2016, 03:28 PM
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I would use a light amount of a quality sealant on both metal surfaces if it is a metal gasket. Just be happy. That port is a huge PITA to fix on a 200TDI.
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  #13  
Old October 4th, 2016, 03:31 PM
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That was my thought- leave the freeze plug alone.

What kind of sealant?
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