Reader Question I have an unusual problem that has NOT been discussed with the dealer. I thought you might have some insight. I do not believe the dealer will. I have discussed with several friends who are pro mechanics and they have no answer.
Just for the heck of it I replaced my master cylinder and clutch slave cylinder to no avail. Oh, did I hear you ask what car?
2000 Kia Sportage 4dr, 5spd manual, 4 wheel drive. 187,000 almost totally trouble free miles – well not quite. Replaced entire front end 2nd winter on warranty due to faulty design of hub seal (only 1 lip) allowed water in and they rusted out. At about 100k replaced a front hub leaking vacuum. At about 160k replaced altenator, battery and front drive shaft u joint. Thats it. Oh, just put on a tail pipe, rest of exhaust system is still original.
The problem first became evident 4 summers ago. It has become gradually worse. It happens ONLY when the engine idles for 5 – 15 minutes (varies) and happens more quickly when it is hot outside, i.e. summer and when the ac is running which obviously puts more heat into the engine compartment.
I want to repeat the problem happens ONLY when the engine idles for awhile. It always goes away after driving for abit. (Just increasing rpm does not seem to fix it although does seem to delay the onset when stopped!)
The problem??: the clutch looses its power boost which I assume comes from the brake hydraulic system since the clutch slave cylinder comes off the brake master cylinder. The slight springiness of the pedal travel from rest to engage totally dissappears, engagement point drops, and the clutch action becomes hard in comparision to normal.
This summer, the longer it idles the worse it gets, including getting to the point that one would normally suspect a bad clutch, ie difficulty getting into gear actually clutch seemed to be barely engaging. This has happened once at Marylands environmental inspection, on a hot day early June, where the engine idled for approximately 20 mintutes with ac on from the time I arrived till I left.
Five minutes driving everything was fine. I continue to drive the vehicle doing my best to avoid long trafic lights or other idling situations and as long as I am successfull at that there is no apparent problem. Clutch action and shifting is the same as when I drove away from the dealer 7 years ago in the fall of 99.
Hey there my friend
You have a strange complaint that is for sure. One thing, you are past due for a clutch replacement, so I would suspect that the internal workings of the clutch…i.e. clutch disc, pressure plate, and release bearings are probably worn out.
Without me personally test driving this vehicle I would suspect the transmission/clutch will have to come out of the vehicle for inspection, but with that mileage, clutch replacement is inevitable I am afraid.
Austin C. Davis