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I put in some Sea Foam a couple of days ago and have been barring it round every so often. This afternoon I sucked it out and re tested it.
Compression test. Before 110psi, now 140psi
Leak down test. Before 40%, now 25%.
So..... this may be completely spurious. I haven't had it running again. Might put it back together and see.
Whereas any improvement is to be welcomed I guess the dilemma now is knowing whether that improvement is genuine or reflective of liquid helping to seal what is currently present a bit tighter. I am sceptical that anything can loosen these deposits just sat in a cold engine but I am open minded. It will be interesting to see what happens if you decide to run the Liqui Moly stuff in the oil.
I know nothing about the Sea foam stuff other than its existence- just make sure you read the instructions carefully and follow them if for instance you need to drop the oil before running the engine once more- hopefully not. Running the engine with the Liqui Moly stuff in the oil will need some time to take effect and then presumably the idea is to blast the stuff out of the engine Italian tune up style?
Whereas any improvement is to be welcomed I guess the dilemma now is knowing whether that improvement is genuine or reflective of liquid helping to seal what is currently present a bit tighter. I am sceptical that anything can loosen these deposits just sat in a cold engine but I am open minded. It will be interesting to see what happens if you decide to run the Liqui Moly stuff in the oil.
I know nothing about the Sea foam stuff other than its existence- just make sure you read the instructions carefully and follow them if for instance you need to drop the oil before running the engine once more- hopefully not. Running the engine with the Liqui Moly stuff in the oil will need some time to take effect and then presumably the idea is to blast the stuff out of the engine Italian tune up style?
Fingers crossed you get a good overall result.
This is probably getting ridiculous
I've got a couple of tins of the pro engine flush from Liqui Moly. It's going in the oil and we'll see what happens. It'll either work and it'll get drained or the engine will be pulled and the oil drained so it doesn't make any difference.
I looked on the can of Engine Flush but the images on Amazon don’t show any directions for use. I’m kind of interested in trying some of their products soon so I watched a video that explains all of them. In that video their representative says to add it to warm oil and then let the car just idle for 10-15 minutes. No revving or driving necessary with the Engine Flush.
All that stuff you poured into the cylinders has to burn back off. If you haven't run it much since doing that, you'll see that kind of smoke. If it always looks like that, that's a different story.
You're certain? You appreciate that I'm launching into a shed load of work.
Well, I'm certainly not there to see and move the bore scope around.
However, everything I've seen is rather convincing....
And it is super common:
Porsche should never have built a high compression engine (without knock sensors or O2 sensor capability) with cast pistons.
Hell, when (not if, but when) the MAF goes bad, you can easily be driving down the road at 16 to 1 fuel mixture, without a clue or any possible way to automatically to correct it.
Although one hell of an engine, with fantastic volumetric efficiency at 5900 rpms, it wasn't one of their "smarter" creations.
I agreed with you, you're not hurting anything by adding chemicals and running it. Go drive it and run it aggressively with all the chemicals in there.
Maybe once some of the carbon and debris is burned out, you can take another look at the piston, through the spark plug hole.
And like you also said...what do you have to lose?
I considered carefully what I would say if I was asked about all this.
Out it comes... started work on it last night. I ran the fancy, German flush through it anyway seeing as I had it. I'll be back in a few days (weeks?) hopefully to bore you with pictures (of bores )
You do not get rid of constipation just by swallowing a teaspoon full of castor oil- it has to work its way though your system before you relieve the blockage!
In the meantime maybe you can fathom out how to get a clear photo with your endoscope!
You do not get rid of constipation just by swallowing a teaspoon full of castor oil- it has to work its way though your system before you relieve the blockage!
In the meantime maybe you can fathom out how to get a clear photo with your endoscope!
It's coming out. There's a couple of other cylinders that aren't brilliant in compression terms. It's not right - the best thing to do is to get it out and have a proper look. I have nearly all the tools and a percentage of the skill required, so there's no excuse.
07-13-2021, 09:17 AM
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