Overheating
#1
Overheating
1997 XK8 - 85000 miles - 2nd owner, good records. Started over heating (granted, it was 108 here in northern Idaho). After cool down, refilled antifreeze, with no sign of leaking in any hose, seal, etc. Still over heated. Replaced thermostat. Still ... so assume next step is replace water pump, although, no leaking - hoses solid. Temp briefly drops when I run heater - my best thinking is still water pump. Other thoughts?
#3
Usually when the bearing goes so does the seal and it leaks ...not being specific to jags but on some constructions, the impeller comes loose and does not rotate .If you run it without the thermostat and it heats you only have the pump or a blocked radiator ..you could reverse flush it and also check if the fins are blocked.
#4
Join Date: Apr 2014
Location: Jersey, Channel Islands
Posts: 4,200
Received 2,434 Likes
on
1,572 Posts
Water pump on early cars is definitely something to check - especially if you don't have history of its replacement.
There are options for new (e.g. AC Delco 252-800, which I used), although see this post from DonB:
https://www.jaguarforums.com/forum/x...7/#post2177569
There are options for new (e.g. AC Delco 252-800, which I used), although see this post from DonB:
https://www.jaguarforums.com/forum/x...7/#post2177569
The following users liked this post:
Johnken (07-16-2021)
#5
Disintegrated impellers
Finally got around to pulling water pump - no impellers left intact - just plastic bits, which I presume are now scattered throughout my engine and radiator - hoping a hard flush will remove most pieces - will look on ebay for a "plastic magnet" - plan to install replacement pump this weekend and hope my overheating problem is resolved.
The following users liked this post:
michaelh (07-16-2021)
#6
#7
Thanks for these suggestions - I'll poke around for them. If I want to "back flush" the radiator with water, which input would I use? "Top" hose port or "bottom" - meaning, the opposite of the normal flow from the water pump?
Trending Topics
#8
Check the radiator, the transmission cooler is on the left side end tank, which one would assume is the cold side. The hose is more mid-mounted, but counts as the lower radiator hose. This is would be my fresh water input for a flush.
PS: Take this opportunity for a chemical flush as well, this will restore the heat transfer. Get you warmer quicker in the winter, too.
PS: Take this opportunity for a chemical flush as well, this will restore the heat transfer. Get you warmer quicker in the winter, too.
#9
#10
Stable temp is a computer controlled illusion on the temperature gauge. An OBDII monitor or RealGauge will give you early warning for overheating.
See https://www.jaguarforums.com/forum/x...e-gauge-62813/
See https://www.jaguarforums.com/forum/x...e-gauge-62813/
Last edited by WhiteXKR; 07-17-2021 at 07:51 AM.
#11
Can the learned and all knowing of the forum tell me if my '03 has a plastic impeller in the water pump? Again I mention I have no issues right now but wish to be prepared. If it is plastic then I will plan on replacing that this winter. Thanks, TM
Last edited by STLTHMSTA; 07-18-2021 at 04:00 PM.
#12
Thread
Thread Starter
Forum
Replies
Last Post
Timothy
XK8 / XKR ( X100 )
16
05-16-2012 07:14 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)