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Join Date: Apr 2009
Location: Copperas Cove, TX
Posts: 211
Another Chain Tensioner/Ramp Question

I have searched the board and cannot find the answer I am looking for...Upon acceleration I notice a knocking/clanking noise on my left-hand side, at idle and deceleration it goes away...prior to this happening I did the chain tensioner upgrade and changed my ramps as well...the lower left inside ramp was a bear to get on and I don’t ever think I got it to seat properly (when you look at it from the side the space is greater between the lower ramp and mounting pins than the space between the upper inner ramp and mounting pins/wall)...I took the chain cover off last night thinking the ramp had come apart and the clanking I heard was from the chain banging against it...to my surprise the lower ramp, although located a bit further from the wall, did not show any evidence of having been beaten by the chain to cause that noise. So my question is this: what are the actual tell-tell signs of a bad tensioner as opposed to a bad/loose ramp? If the tensioner failed would the ramps show evidence of chain marks? If the ramp was not seated properly, thus banging against the walls under acceleration, would the ramps show signs of this banging? BTW I bought the tensioner set used from a fellow board member. I have a set of ramps on the way so that I can replace the lower left (inner) to see if I can get it to seat better. TIA for your replies

Oh, one more thing....if the clanking I heard was from a rod bearing etc. i would think that by now the engine would have seized up or I would hear funny noises at idle too?

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95 993 Cab
99 996 C2
80 911SC Targa
85 944 N/A(sold)
Old 02-18-2010, 06:36 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
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Join Date: Feb 2006
Location: Scottsdale, AZ
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When I did the upgrade I thought that the inboard ramps had to seat in with no gap, I tried and could not get it to seat in as well it did not click onto the studs like the outer ramps, I left it with the gap which matched up with the groves to the chain.

Flash Forward...I have disassembled my engine (for leaks that have turned into many upgrades) and was able to better observe the situation and realize that there should be a gap as I had it.

My theory is that your other inboard chain ramps have been forced to far onto the studs and the chain is not following the grooves.

Or your chain tensioner may not be primed, did you pump it up with oil before installation?

Disclaimer: I am a novice and did not sleep in a Holiday Inn Express last night.

Shane

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78’ SC 911 Targa - 3.2SS, PMO 46, M&K 2/2 1 5/8” HEADERS, 123 DIST, PORTERFIELD R4-S PADS, KR75 CAMS, REBEL RACING BUSHINGS, KONI CLASSICS
Old 02-18-2010, 09:09 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
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