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+--- Thread: Coolant system pressurising but not overheating?! (/showthread.php?tid=27448)
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RE: Coolant system pressurising but not overheating?! - D.r.1989 - 13-11-2014
Thanks for the suggestions. Iv already removed the one way valve from the cap and it made little to no difference. Will report back after a long drive this weekend.
Ps I have always had old cars, currently have a 72 marina van 75, type 2, 2x87 sj's, 89 merc and the newest shamefully a 98 land rover discovery.
RE: Coolant system pressurising but not overheating?! - nominous - 14-11-2014
Found the posts & thread I was talking about:
http://www.theywhoshallnotbenamed/forum/archive/index.php/t-100690.html
Turned out that it might have been a blockage.
FWIW. If I leave mine overnight, it's got ample pressure built up. If started from cold, it's bubbling in the rad - side mount rad cap.
It never overheats. It gets warm on a hard run, but never hits 90C.
heater matrix is bypassed, but with smaller diameter hose as outlined in the westfield XUD project flow research.
I'm not ruling out a HG due to the bypass already having been done with full bore before my adjustment.
Car drives fine tho. Uses a little coolant.
RE: Coolant system pressurising but not overheating?! - D.r.1989 - 16-12-2014
Bit of a delayed reply. Bit fed up with this engine now, Iv fit a vauxhall expansion bottle and left the cap ever so slightly loose to relieve pressure and all has been well! Untill after a week it's lost nearly 2.5 litres of water and antifreeze! No signs of a leak or water being blown out of expansion bottle. Gunna try go over it with a fine tooth comb to see where it's leaking. My sj gives me no trouble what so ever and runs so well, it even averages 40mpg! I really like the xud engine but damn this is testing me!
RE: Coolant system pressurising but not overheating?! - r3k1355 - 17-12-2014
It does sound like it's popped the head gasket mate.
RE: Coolant system pressurising but not overheating?! - Mattcheese31 - 17-12-2014
Head gaskets go on these engines without mixing oil in the coolant and don't overheat until they really go, had it on two cars now
RE: Coolant system pressurising but not overheating?! - nominous - 17-12-2014
So it'll pressurise, perhaps use some coolant but otherwise it'll look ok?
Still would love to know what the magical mystery fix was in the post I referenced.
RE: Coolant system pressurising but not overheating?! - Mattcheese31 - 17-12-2014
(17-12-2014, 05:28 PM)nominous Wrote: So it'll pressurise, perhaps use some coolant but otherwise it'll look ok?
Still would love to know what the magical mystery fix was in the post I referenced.
exactly that mate.....
RE: Coolant system pressurising but not overheating?! - nominous - 17-12-2014
fair enough. Worry about it when ARP's go in then
RE: Coolant system pressurising but not overheating?! - D.r.1989 - 17-12-2014
(17-12-2014, 11:34 AM)r3k1355 Wrote: It does sound like it's popped the head gasket mate.
Iv only just done the head gasket and had the head skimmed and pressure tested.
RE: Coolant system pressurising but not overheating?! - D.r.1989 - 22-03-2015
But of a late reply but I suspected block was cracked, changed the bare engine and had no issues what so ever since!
Thanks for all the advice!