Author Topic: How Long Do Timing Chain Tensioner Pistons Last? LOTS of project pics added 5/30!  (Read 13202 times)

DesktopDave

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That is great work, especially since you've already done some of the things I was considering.  Thanks for the warning about RTV on the profile gasket...I'd definitely have made that mistake.

I'm looking forward to seeing if your methods for sealing the gaskets perform as expected.
'08 Karmesinrot 128i 6MT
'86 Zinnoberrot 635CSi (M30B32/G265/3.46 torsen LSD)

Sold: '97 Montrealblau 318iS, '91 Brilliantrot 318i, '91 Brilliantrot 318iS

bmwman91

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Quote from: esager;104330
Awesome post - thanks for your diligence in photographing your progress for the rest of us.

Eric
Others have posted pics of their work, and it has helped me immensely. I figured I would try to return the favor!

Quote from: monty23psk;104335
You haven't done the delete under heater plate mod? Any reasons? Maybe I missed it.
I thought about deleting the stuff. However, after 11 years of E30 ownership, I have found that it is best not to second-guess BMW engineers. Although I doubt that I will ever have throttle icing problems, I do like ot go to the mountains and backpack/climb a lot, so it could happen someday, in a very remote & inconvenient location!

Quote from: DesktopDave;104338
That is great work, especially since you've already done some of the things I was considering.  Thanks for the warning about RTV on the profile gasket...I'd definitely have made that mistake.

I'm looking forward to seeing if your methods for sealing the gaskets perform as expected.
Yeah, the RTV seemed like a good idea, but it made things difficult. I think that some heavy silicone assembly lube is what you want to put on the bottom of the head and the top of the gasket. Still seal the bottom of the gasket to the timing case with RTV though (Permatex Ultra Black seems like quality stuff).

You should also put a heavy blob on the ends when you go to install the cover & its rubber gasket so that oil won't leat out of the junction. The inner gasket had stretched in my case, and I had to cut the ends off to get the outer gasket on, so I worked RTV in with my fingers to get it in any possible breach at the ends of the inner gasket. Then I added a blob for good measure & installed the cover + outer gasket.

I do seem to be getting some oil leaking into the center runner of my skid plate (OEM one), but it seems to be from the back of the engine. I have yet to get under there & determine the source. I thought I found oil a couple times, but it turned out to be coolant+water mixed with the old oily grime on the plate. It might just be more run-off from bleeding mixed with residual oil on the plate. I HOPE it is anyway!

If it isn't, then my guess would be the rear main seal since I haven't replaced that. I do not see anything coming off of the front of the engine where I was "working."



Oh, and if anyone in the Bay Area needs to borrow my crank locking tool, feel free to ask. I won't ship it though. The thing weighs like 40lbs!

06/05/2011 - 212,354 miles
Visit HERE for a plethora of 318iS stuff and some other randomness.  Would you say I have a, plethora, of pinatas?

monty23psk

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I am the same way, dont like moving away to much from what the engineers have done. If it was for the pictures that showed it without it from the euro models and for living in FL, I would not have done it. First rebuild I kept it stock.
Alex  88 m5 | 91 318is | 19 Subaru Ascent
BMW Tool Rentals & Fender Roller

MikeDE

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Nice job, Dude...you make us proud.  

It makes me want to go start reassembling mine a bit....

bmwman91

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Thanks!

I gotta say, a big metal pan with paint thinner (low-odor mineral spirits), an old toothbrush, a super coarse scrubby pad and some gloves will do wonders for grimy old parts. For the really bad stuff, I broke out the MEK. Just take your time and clean it methodically, and it will go back together much more nicely than it came apart (since you can actually grip stuff without it slipping). A firm and un-dented gasket scraper is also a great investment.

I also filled the fastener cups with mineral spirits & let them sit for a good few hours, agitated them with the toothbrush, and repeated that a few times. After a rinse with some super hot water, they were nice & clean (although they still looked sort of nasty).

Years of working on stuff has finally taught me a little patience. I used to hurry things & cut corners and...well, garbage in, garbage out. I'm still impatient, but I know that taking longer now ends up saving time later!

06/05/2011 - 212,354 miles
Visit HERE for a plethora of 318iS stuff and some other randomness.  Would you say I have a, plethora, of pinatas?

bmwman91

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Someday when I have a house & a garage (and a second car) I am pulling the engine and tearing it down to the last bolt. Everything is getting bead-blasted, and all precision surfaces reground/bored. There's probably an Eaton M90 supercharger in there somewhere too.

06/05/2011 - 212,354 miles
Visit HERE for a plethora of 318iS stuff and some other randomness.  Would you say I have a, plethora, of pinatas?