jensen healey head

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uss1702
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Joined: Sun Feb 06, 2011 2:25 pm

jensen healey head

#1 Post by uss1702 » Sun Feb 06, 2011 2:44 pm

hi first time on.can anyone tell me how to check if the valve seats, on my lotus 907 engine, have been converted to run on unleaded petrol ,head is of and camshafts look brand new.

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Luxobarge
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Location: Horne, Surreyshire

Re: jensen healey head

#2 Post by Luxobarge » Sun Feb 06, 2011 2:58 pm

I don't know that engine, but is it an ally head, or cast iron?

If it's an ally head (and I would have thought it was!) then it will have valve inserts in it already, which are almost certainly unleaded-compatible.

Hope that helps...
Some people are like Slinkies - they serve no useful purpose, but they still bring a smile to your face when you push them downstairs.

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JPB
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Re: jensen healey head

#3 Post by JPB » Sun Feb 06, 2011 4:16 pm

According to a fella on another forum I wh.. sorry, frequent, who replaced one aluminium-headed, unleaded compatible slant four with another, yes, the 907 is quite happy to run on unleaded without any problems as a result. It'll probably appreciate the 99 octane stuff but needs no lead nor any substitute for it.

The 907 is known for eating its exhaust valves, but that's not a situation that's affected by the fuel used, it's simply a result of the grade of stainless used in the original valves being a little less than stable. I'm told that alternative valves are available, made from a more consistent grade of stainless.
J
"Home is where you park it", so the saying goes. That may yet come true.. :oops:

healeyneil
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Location: Glasgow

Re: jensen healey head

#4 Post by healeyneil » Mon Feb 07, 2011 12:49 pm

The Jensen Healey was designed to run on what used to be called 2 star, and will run fine on unleaded

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JPB
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Re: jensen healey head

#5 Post by JPB » Mon Feb 07, 2011 9:40 pm

2 star was leaded, it's the fact that it has an alloy head and steel seats that allow it to take fuel without lead..... ;)
J
"Home is where you park it", so the saying goes. That may yet come true.. :oops:

uss1702
Posts: 3
Joined: Sun Feb 06, 2011 2:25 pm

Re: jensen healey head

#6 Post by uss1702 » Sun Feb 13, 2011 3:07 pm

Luxobarge wrote:I don't know that engine, but is it an ally head, or cast iron?

If it's an ally head (and I would have thought it was!) then it will have valve inserts in it already, which are almost certainly unleaded-compatible.

Hope that helps...
thanks for input better safe than sorry

uss1702
Posts: 3
Joined: Sun Feb 06, 2011 2:25 pm

Re: jensen healey head

#7 Post by uss1702 » Sun Feb 13, 2011 3:09 pm

thanks for all input better safe than sorry

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