Tom W

The owners manual of my 964 says about the same thing for oil pressure as my 993 - it must be over 3.5 bar at 5000 rpm. However, my 993 idles at about 3.5 bar and with any throttle input at all, gets up over 4 bar and usually pegs the guage. The 964 I just bought will idle at about 2 bar (once warm) and, while it is above 3.5 bat at 5000 rpm, never really pegs the guage.

Is this normal behavior for a 964? If not normal, what would cause it?

Adrian

Dear Tom,
No this is low. The oil pressure should be the same as your 993. Oil pressure sender failure would be high on my list after checking the oil level etc.
Of course being a track car you might be looking at a worse problem but the senders are known to fail.
Ciao,
Adrian
964C4

Tom W

Thanks Adrian.

Everything else appears to be fine. Oil level is correct by both the dip stick and the guage. No leaks and the compression and leakdown test from the PPIs were great.

Any suggestions on trouble-shooting if it's ther sender or not?

BGLeduc

The oil pressure gauge of my '90 USA spec 964 C2 behaves exactly like your 993.

BGL