1995 Range Rover Classic Overheats

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BLUBOT
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hi, just wanted to drop a line and say that this is a great website with tons of great info.
I drive a 1995 Range Rover Classic, 4.2L V8 and encounter the following problem: at 60mph or above and above 2Krpm, the temp. gauge rises slowly to the red...when driving slow and below 2Krpm the temp. gauge goes back to normal.
I already replaced new radiator&fan, temp. sender and termostat. can you suggest where else to look?
Apr 12, 2006 at 3:34 AM
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LOSONE
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Welcome on board even if you drive on the wrong side!!

It sounds like you have an air lock in the engine. Some of those engines need to be bled to insure all the air is out. Let me know
Apr 12, 2006 at 5:12 AM
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BLUBOT
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losone: thank you for yr reply. do you mean I should bleed the cooling system at the top of the neck thats coming up beside the intake planium...right after engine start, when engine is still cool?

another probably related issue: when the engine is warm, at idle the rpm is very irregular, 900rpm down to 500rpm, up to 700rpm etc...plus there is a clicking noise from the engine which I beleive to be the hydraulic lifters/tappets...is it worth the trouble/cost to replace those...the noise has not gone worse over the last year...but its just there and annoying. in addition there is liquid coming out from the exhaust, I beleive the engine is running to rich...what can I do about that? my range rover has done about 50.000miles and only very short trips everytime between 10-20 miles per tip max. during its lifetime...she is a garage lady but I wanna get her up to speed...
Apr 12, 2006 at 7:14 PM
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LOSONE
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The engine has to be warm and the T-stat open. There is a beled port somewhere on the engine so air can be released from the system and prevent cavation. (bubbles in the coolant) which will cause overheating. Good luck
Apr 13, 2006 at 6:36 AM
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THETECH1C1AN
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Hey all... I'm also newbie and I hope I'm in the right thread. Looking forward to exchange and share some interesting things with you guys. Thanks!
Jan 13, 2010 at 9:51 PM
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Suggested Repair

With the engine warm and the thermostat open, bleed the cooling system at the engine bleed port to release trapped air and prevent coolant cavitation that can cause overheating.

Conversation Summary

The owner of a 1995 Range Rover Classic 4.2L V8 reported the temperature gauge rising toward red above 60 mph and 2,000 rpm, then returning to normal at lower speed and rpm. A new radiator, fan, temperature sender, and thermostat had already been fitted. The expert said trapped air may be causing the overheating and advised bleeding the system only after the engine is warm and the thermostat is open. The owner also mentioned irregular warm idle, a clicking noise suspected to be hydraulic lifters, and liquid from the exhaust on short trips, but those issues were not addressed.

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