Stock oil cooler is very small silver colored so yours is aftermarket. If no skid plate probably want one as the oil pan and its design wont hold up to casing out in the sand. ICT makes a low profile pan. No chain roller on mine and seemed most remove it as POS. Best chain for these is a EK 530ZZZ (never broke one). MFR chain lube is great off road as does not hold the sand. I ran Shell Rotella syn T6 oil like I do in just about everything. See if you can verify if there is a King Sand Seal kit as well as their Case Saver if chain breaks ... I believe Brian King is still doing these on request even though company is long gone. I ran a KSR billet front sprocket cover which helps too if chain breaks. Water pump is known to fail and be a bit weak ... I ran an RCC electric pump which was nice as can run it when engine is off along with fans to cool engine down. Check if all four cylinders are hot after idling a while and/or if having any signs of strange power issues at lower RPMs its likely the vacuum sensor was not plumbed correctly (sensor needs to be looped in center of all four cylinders for balanced pressure reading rather than at end) as this is a very common issue overlooked in many transplants.
