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#1
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Guide rail pin nightmare!
Busy replacing the timing chain tensioner and guide rails on the 450slc and can't believe my bad luck!
Four of the guide rail pins came out beautifully, but I stripped the thread on the 5th. After trying all sorts of tricks to get the pin out, I bought a 6mm "recoil" kit, drilled, tapped and coiled the pin and managed to extract it and breathe a sigh of relief! But, as luck would have it, the 6th pin has NO thread, as in ZERO! Must have been a dud from the factory. I wish I could have a word or two with the guy who assembled this engine! Surely he would have noticed that the pin had no thread when he tapped it in? Anyway, so now I have to tap a thread in this pin as well. Wish me luck!
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2006 C180K 112000km 1980 450SLC 123000km and a Toyota |
#2
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ugh , possibly the threads have worn away and were there at one time??
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Ron 2015 Porsche Cayman - Elizabeth 2011 Porsche Cayman - Bond,James Bond Sadly MERCEDESLESS - ALways LOOKING ! 99 E320 THE Queen Mary - SOLD 62 220b - Dolly - Finally my Finny! Sadly SOLD 72 450SL, Pearl-SOLD 16 F350 6.7 Diesel -THOR 19 BMW X5 - Heaven on Wheels 14 38HP John Deere 3038E Tractor -Mean Green 84 300SD, Benjamin -SOLD 71 220 - W115-Libby ( my first love) -SOLD 73 280 - W114 "Organspende" Rest in Peace 81 380 SL - Rest in Peace |
#3
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What would wear them?
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RM Smith 1988 560SL "Where is it again that we are going, and why are we in this handbasket"? |
#4
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Nope, definately no threads and the inner diameter of the pin is smaller than it would be if it was threaded. The photo is a bit blurry, but it's still pretty clear to see.
I'll tackle it this weekend, but I first need to figure out the best way of rotating the tap because space is limited there and my tap handle is too big. Fun!
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2006 C180K 112000km 1980 450SLC 123000km and a Toyota |
#5
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Quote:
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RM Smith 1988 560SL "Where is it again that we are going, and why are we in this handbasket"? |
#6
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could it have been an original press fit? then again , doubt that
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Ron 2015 Porsche Cayman - Elizabeth 2011 Porsche Cayman - Bond,James Bond Sadly MERCEDESLESS - ALways LOOKING ! 99 E320 THE Queen Mary - SOLD 62 220b - Dolly - Finally my Finny! Sadly SOLD 72 450SL, Pearl-SOLD 16 F350 6.7 Diesel -THOR 19 BMW X5 - Heaven on Wheels 14 38HP John Deere 3038E Tractor -Mean Green 84 300SD, Benjamin -SOLD 71 220 - W115-Libby ( my first love) -SOLD 73 280 - W114 "Organspende" Rest in Peace 81 380 SL - Rest in Peace |
#7
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Why don't you just buy another pin or find one at a junkyard? Seems to me your tapped one might be more likely to cause a new headache next time after all the trauma it has been through.
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80 300SD (129k mi) 82 240D stick (193k mi)77 240D auto - stick to be (153k mi) 85 380SL (145k mi) 89 BMW 535i 82 Diesel Rabbit Pickup (374k mi) 91 Jetta IDI Diesel (155k mi) 81 VW Rabbit Convertible Diesel 70 Triumph Spitfire Mk III (63kmi)66 Triumph TR4a IRS (90k mi)67 Ford F-100 (??) |
#8
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Do you have a square socket the size of the tap end? You could use a ratchet. On some tap handles the cross bar can be removed and a 3/8 or 1/4 ratchet used.
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#9
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I think I'll replace all the pins just to be safe. This one is not the tensioner rail, but the lower pin of the guide rail on the same side.
I don't have a square socket, but I'll try and use a normal hex socket - good idea.
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2006 C180K 112000km 1980 450SLC 123000km and a Toyota |
#10
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OK, I found that I could remove the cross bars of my tap handle and used a short 8mm bolt in place of one of the bars to clamp the tap. That worked and the non-threaded pin is now out!
Now to order the replacement rails and pins and get it all back together again.
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2006 C180K 112000km 1980 450SLC 123000km and a Toyota |
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