Just curious, has anyone ever ditched their 16mm metal Medusa coolant pipe for the late style 20mm Cabriolet pipe? How difficult was it to adapt it to the heater hose routing of the Rabbit? If anyone knows better, let me know and I will upgrade it. I hope what is on there is better than the paper gasket. I am not going to remove it to upgrade the gasket. This new Meyle pump unit has a tar-like fibrous gasket. Autohauz recommends that you rebuild, instead, with the metal/neoprene gasket I referenced above. It looks like all the new coolant pumps which come as complete units, have the 25mm inlet for the metal pipe return they are selling these even for the early years of mk1's.Īlso, if you are re-using your old pump housing 1/2, you are normally given a paper gasket. I still cannot find the dimensions for that hose off the internet. What I need to know is, if I order the later offset style, the 027121063C, whether that it is going to match this new pump's 25mm inlet nipple, and the 16mm nipple on the coolant pipe. This would fit my pump inlet (25mm) but not the metal coolant pipe (16mm). To make matters more confusing, I just ran into another part number, 068121063M, which Autohauz indicates is a 25mm x 20mm reduction. Looks like no local auto stores have it, even a local distribution center, so I'll have to order it. So I assume the offset hose is for the larger inlet style, and they added the offset just as a bonus so it fits better because it is not a straight shot between the metal pipe and the inlet. My old pump had a 22mm diameter inlet this new pump has a 25mm inlet. I just did some measuring and found out why it was a devil for me to get the old hose (the one I am replacing) over the coolant pump inlet: different coolant pump. Now, CARQUEST (Now Advance Auto) is telling me they have the 055121063A straight as a Dayco brand, with 5/8" to 3/4" openings, which translates to 16mm and 19mm. OK some info on the offset hose 027121063C from :ġ983 L4 1.6L 1588cc From 10/83 Pipe to Pump w/ M/T Let's see if I can find info on the offset hose. I'll have to measure the diameter of my crack pipe. Notes: 1.5 - 1.8 engines up to chassis no: 17-D-657 080Īnother website shows the reduction diameter at 15mm, instead. I find this info listed on a webpage for the straight piece: Is the only difference the offset or are the end diameters different? I recall that different styles and perhaps diameters of crack pipes were used. Reversing the steps can break the probe wire, destroying the wiring harness.Looks like the straight one is predominately for 1983 and earlier vehicles, while the offset one is listed for later Cabriolets and 1984 Jetta. Note: Because the thermal probe is permanently connected to the wiring harness in most Thermatic switch kits, you must screw the compression fitting into the inline adapter first, then install the probe into the compression fitting. Thermatic switches are available separately. 1591-010) / 0404, and Davies Craig Digital Thermatic switches 0444, 0455, and 0500 (Pegasus Part Nos. Kit includes compression fitting to 1/4 NPT adapter, 5mm ID olive (for Davies Craig Digital controllers), 6mm ID olive (for Davies Craig Mechanical controllers), fiber-reinforced composite inline fitting, 3mm adapter sleeves, and two hose clamps.ĭesigned for use with Davies Craig mechanical Thermatic switches 0401 (Pegasus Part No. Use the included rubber sleeves to fit 38mm to 47mm (1 1/2" to 1 13/16") ID hose. An in-line adapter slips into your 30mm to 35mm (1 3/16" to 1 3/8") ID coolant hose to accept the compression fitting. ![]() This simple adapter kit from Davies Craig lets you install the probe in a radiator hose for direct reading of coolant temperature instead.Ī special compression fitting adds 1/4 NPT male threads to the thermal probe. The Davies Craig Thermatic Fan Controllers use a thin probe that is designed to be installed between the fins in your radiator.
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