Date: Tue, 15 May 2012 21:29:34 -0400
Reply-To: "Chris S." <szpejankowski@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: "Chris S." <szpejankowski@GMAIL.COM>
Subject: Re: what clues about engine health can I get...
In-Reply-To: <4FB2EEA8.4090907@turbovans.com>
Content-Type: text/plain; charset=utf-8
Factory oil pressure spec is based on 3 data points: engine speed, temperature and pressure. 2000rpm, 80C, 2 bar. If you're not using 3 data points, you're guessing.
After 2 years of looking at my oil temp and pressure gauges I can tell you that water temp is a poor indicator of oil temp. Therefore, for the purpose of determining engine health, which I though we were discussing, you must use 3 data points or, again, you're guessing. And if a guess is close enough then you're ok.
Chris.
Wysłane z iPhone'a
Dnia May 15, 2012 o godz. 20:02 Scott Daniel - Turbovans <scottdaniel@turbovans.com> napisał(a):
> yes and no..
> oil temp at first tracks coolant temp.
> it's going to be at least that warm.
> then....the more you drive, and the hotter things are ...oil temp goes up and up gradually ..
> so in terms of not exceeding redline oil temp ...a gauge is useful..
> otherwise ..
> you know when it's normal and when it's extra hot ..
> like when ambient temps are high ....under a lot of load , that's when oil temps can get dangerously high without much in the way of an oil cooler.
> otherwise ..you know when it's well warmed up but likley not 'that hot.'
>
> oil pressure at an oil temp of 'par warmed up' is what of interest.
>
> On 5/15/2012 2:22 PM, Chris S. wrote:
>>
>> Oil pressure gauge is a good start, but you also need oil temp, since the two are very closely related. Half the information is close to no information.
>>
>>
>> Chris.
>>
>> Wysłane z iPhone'a
>>
>> Dnia May 15, 2012 o godz. 15:33 Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM> napisał(a):
>>
>>> that's how to tell really how good/bad it is ..
>>> running it.
>>> oil pressure gauge on it then would be nice too. That's important info
>>> on gauging engine condition and life remaining of course.
>>>
>>> On 5/15/2012 7:59 AM, Alistair Bell wrote:
>>>> will do. I bet some of the lifters will be collapsed, motor has been sitting as is for a few years.
>>>>
>>>> Depending on the comp. test results, I might swap the engine in early next month. I'll be dropping trans and engine on my van then (for other reasons) and the current engine has a couple of annoying leaks that need dealing with. So I might gamble with the spare while I fix up the other one.
>>>>
>>>> alistair
>>>>
>>>>
>>>> On 2012-05-15, at 4:49 AM, Kenneth Lewis wrote:
>>>>
>>>>> Alistar,
>>>>> Pull the rocker arms and look for mushrooming valve stem ends. If you are
>>>>> not going to use the engine for a while, just leave them off to relieve
>>>>> pressure on the springs and hydraulic lifters. Check for collapsed or
>>>>> spongy lifters.
>>>>>
>>>>> Ken
>>>>>
>>>>>
>>>>> On Mon, May 14, 2012 4:11 pm, Alistair Bell wrote:
>>>>>> when engine on bench?
>>>>>>
>>>>>> I had to move my spare engine, again, while working in the barn. I need
>>>>>> to decide what to do with it. Came as a spare with my syncro. was given to
>>>>>> the seller by a friend. Supposedly pulled from van to make way for
>>>>>> conversion.
>>>>>>
>>>>>> What I can see upon casual observation:
>>>>>>
>>>>>> - oil leak from base of crankcase breather tower (seen that before!)
>>>>>> - minor oil weeping from one valve cover
>>>>>> - pushrod tubes shiny, oil and rust free
>>>>>> - oil pump endplay 0.004" (good)
>>>>>> - water pump seized
>>>>>> - crank can be rotated, there is compression. I suppose I could rig up my
>>>>>> spare bellhousing and starter to spin the bugger and test compression.
>>>>>>
>>>>>>
>>>>>>
>>>>>> So what else can I look at apart from pulling the heads?
>>>>>>
>>>>>> alistair
>>>>>>
>>>>>>
>>>>>
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