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AuthorTopic: 3.5 Classic compression ??  (Read 1479 times)

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Offline wizard

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3.5 Classic compression ??
« on: April 30, 2010, 08:05:13 »
Hi
I am going to check the compression on Mrs wizards 1989 3.5 Rangie sometime today.
But not having a Haynes manual for it, I dont know what a good reading would be. I would guess around 150psi

Does anyone know what I should expect.

regards
wizard
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Offline hairyasswelder

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Re: 3.5 Classic compression ??
« Reply #1 on: April 30, 2010, 12:04:00 »
From memory 150 is around the lower mark.  Around 170 is good but if they are even etc....
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'88 RR 3.5 efi, an on going project :o) evolving daily/slowly

Offline Range Rover Blues

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Re: 3.5 Classic compression ??
« Reply #2 on: May 03, 2010, 03:06:55 »
Yeah, 170/185 but mostly well within 10% of each other.

If you get 205 like me then start checking what mods have been done ;)
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Blue,  1988  Range Rover 3.5 EFi with plenty of toys bolted on
Chuggaboom, 1995 Range Rover Classic
1995 Range Rover Classic Vogue LSE with 5 big sticks of Blackpool rock under the bonnet.

Offline wizard

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Re: 3.5 Classic compression ??
« Reply #3 on: May 03, 2010, 11:39:38 »

Heres what I got

cyl 1 = 120
cyl 2 = 150
cyl 3 = 150
cyl 4 = 145
cyl 5 = 150
cyl 6 = 160
cyl 7 = 145
cyl 8 = 148

I bought a litre of of this stuff AMETECH.
I originally thought it was a bit of a snake oil type treatment, but after reading about it thought it was worth a shot.

I'll post up the compression readings once i have covered a 1K miles or so.

Regards
wizard
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Offline Range Rover Blues

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Re: 3.5 Classic compression ??
« Reply #4 on: May 04, 2010, 00:42:22 »
Hmmmmm, watching with interest.
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Blue,  1988  Range Rover 3.5 EFi with plenty of toys bolted on
Chuggaboom, 1995 Range Rover Classic
1995 Range Rover Classic Vogue LSE with 5 big sticks of Blackpool rock under the bonnet.
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