With hub adaptors yes
In order to be sure, they need to be load rated as they're going on a van, and would need to be a min of approx 1543.24 lbs per wheel.
To determine what wheels will fit your T4 Transporter, you need to check the bolt pattern, offset, and center bore specifications. The standard bolt pattern for a T4 is typically 5x112, with an offset ranging from ET35 to ET50, depending on the model and year. Additionally, ensure the wheel diameter and width are compatible with your vehicle's specifications, commonly 15 to 18 inches in diameter. Always consult your owner's manual or a wheel specialist for the best fit and safety.
Try asking on the forums at www.t4club.co.uk very helpful friendly free commity for worldwide VW T4 owners
To adjust the engine idle speed on a T4 Caravelle 2.5 TDI, locate the idle speed adjustment screw on the injection pump. First, ensure the engine is at operating temperature. Then, with the engine running, turn the screw slightly clockwise to increase the idle speed or counterclockwise to decrease it, checking the RPMs with a tachometer as you adjust. Always ensure the adjustment is within the manufacturer's specified idle speed range for optimal performance.
To change the wheel bearings on a 2003 VW T4 Caravelle, first safely lift the vehicle and remove the wheel. Next, detach the brake caliper and the rotor to access the hub assembly. Use a bearing puller to remove the old bearings from the hub, then press in the new bearings and reassemble the hub with the rotor and caliper. Finally, replace the wheel, lower the vehicle, and ensure everything is tightened to the manufacturer’s specifications.
t3/t4
In a 1993 Volkswagen T4 Caravelle, the hydraulic clutch fluid reservoir is typically located near the back of the engine compartment, on the driver's side. Look for a small, translucent reservoir with a lid labeled for clutch fluid. To fill it, remove the cap and add the appropriate type of hydraulic fluid, usually DOT 4 brake fluid, ensuring not to overfill. Always check for any leaks and ensure the system is properly bled after adding fluid.
It is best to go to a mechanic and get them to order and fit the spare part.
on the front of the gearbox there is a Black plastic pipe with a lid going over it, take the lid off and top up. Be care full not to over fill. This is on the T4 2.5TDi. The black pipe dimensions is about 3/4 of an inch in diameter and 4 inches long
the head
it will raise t4 levels
The old Total T4 test (TT4) is no longer considered the best way to test for T4 levels. T4 and T3 can both be bound by other proteins and hormones in the body. When this happens, the T4 or T3 is not usable by the body. The body can only use T4 and T3 that is not bound, or free. For this reason, Free T4, which only tests the free levels of the hormone, is now preferred over Total T4 testing as more accurate.