Engine temp how cool is bad ?

Posted By: cjs69mope

Engine temp how cool is bad ? - 04/21/13 05:53 PM

Does Running to cool of operating temps hurt engine's in any way?
Curantly my car has a stroker 493 that only gets to 165 in cool 45 deg weather.
In the hot days of summer she runs 175 unless driven long distance at highway speeds of 60 to 70 mph then i have seen 195.
She is using some oil and i don't have a valley tin .
I am using the Indy valley cover .
Last summer pulled the intake and it was full of oil .
Not sure where it was coming from i thought it might be the Mopar Performance valve covers because the baffles are not that great in side the cast aluminum covers .
I went so far as to make my own baffles to try get less oil sucked in through the pcv valve. running a MP breather on one side and pcv on the other.
What would be my next step ?
She seems to be using about a quart every 50 to 100 miles but does not foul plugs weird. runs good and has great power .
Any ideas?

Posted By: Pacnorthcuda

Re: Engine temp how cool is bad ? - 04/21/13 06:11 PM

I wouldn't concern myself with the operating temp until the EXREME oil consumption issue is solved...

Posted By: domingo

Re: Engine temp how cool is bad ? - 04/21/13 06:11 PM

I am using ehaust evacs and my intake is full of oil as well, i think its sucking the oil from the intake to head joint.

Hook up some exhaust evacs and run it like that some time and then see if your intake still gets contaminated with oil????

Posted By: domingo

Re: Engine temp how cool is bad ? - 04/21/13 06:15 PM

what heads do you have? do you have ported heads with bronze pushrod sleeves? could be sucking oil from there too....

too loose clearance on the valve guides???? bad intake valve seals????

then get into more serious stuff like checking piston rings...that could be your problem, but the last one to check since it takes taking your whole motor apart.

Posted By: dOc …

Re: Engine temp how cool is bad ? - 04/21/13 06:22 PM

That is A LOT of oil usage ... you are going to carbon-up the valves, combustion chambers and ring-lands BIG TIME if you don't straighten that out first.

Posted By: cjs69mope

Re: Engine temp how cool is bad ? - 04/21/13 06:46 PM

The heads are Indy SR They were bowl ported and gasket matched nothing major.
Any way to check valve seals with a bore scope camera?
Already did the leak down test less then 5% across the board.
compression is on the high side like 200 psi but i think because of oil in the cylinders.

Posted By: Crizila

Re: Engine temp how cool is bad ? - 04/21/13 07:19 PM

Quote:

Does Running to cool of operating temps hurt engine's in any way?
Curantly my car has a stroker 493 that only gets to 165 in cool 45 deg weather.
In the hot days of summer she runs 175 unless driven long distance at highway speeds of 60 to 70 mph then i have seen 195.
She is using some oil and i don't have a valley tin .
I am using the Indy valley cover .
Last summer pulled the intake and it was full of oil .
Not sure where it was coming from i thought it might be the Mopar Performance valve covers because the baffles are not that great in side the cast aluminum covers .
I went so far as to make my own baffles to try get less oil sucked in through the pcv valve. running a MP breather on one side and pcv on the other.
What would be my next step ?
She seems to be using about a quart every 50 to 100 miles but does not foul plugs weird. runs good and has great power .
Any ideas?

Start by running it at idle. With the PCV hooked up, remove the breather on the other valve cover and plug the hole with your hand / finger. You should feel a slight vacuum. If not and you feel pressure, the PCV is not working or you have an excessive amount of blow-by. Also look at the inside of the PCV hose. If it is wet with oil, it may not be shielded proper with those valve covers of blow-by issue again. Only other way oil can get in to the intake runners ( "intake full of oil" )is a bad seal between the heads and intake manifold. You could also try running it without the PCV ( vent both sides ) and see if your oil consumption goes away. Don't think cold engine operating temp has much to do with above - not a qt every 100 miles anyway.

Posted By: ahy

Re: Engine temp how cool is bad ? - 04/22/13 03:02 AM

On the temp, cool makes power but can shorten engine life. 180 seems to be the happy medium. I'd be looking for a 180 degree stat. Agree that is second however after you figure out the oil consumption.

Posted By: sixpackgut

Re: Engine temp how cool is bad ? - 04/22/13 04:07 AM

I run just breathers on my 6 yr old motor and used no oil at all in 1500 miles at Drag Week

some say the evac system doesnt work with an exhaust

Posted By: cjs69mope

Re: Engine temp how cool is bad ? - 04/24/13 11:58 PM

Up date Pulled a couple of valve springs off , My Indy heads have Teflon PC seals on them. They are real Hard. I think this might be the cause of my oil burning issues .
I have read that these do not belong on a street car , ordered comp cams viton pc seals . going to try them.
Guides on the two i have checked so far are Tight like less than 2thou.
I will keep posting what i find.
Need to send the push rods back to get shorten found them to be .130 to long.
Smith Bros said they can shorten for $3.50 a rod . those guys are great! So its going to be a while until i get this thing back together.

Posted By: an8sec70cuda

Re: Engine temp how cool is bad ? - 04/25/13 01:18 PM

I seriously doubt the valve seals are the problem. I know motors w/ no valve seals at all that don't use that much oil.
I'd get rid of the pcv valve, just run rbeathers on the valve covers and try again.

Posted By: 70satelliteguy

Re: Engine temp how cool is bad ? - 04/25/13 03:18 PM

" Only other way oil can get in to the intake runners ( "intake full of oil" )is a bad seal between the heads and intake manifold"
How would this happen with a Indy Valley pan on a BB???

Mike

Posted By: Crizila

Re: Engine temp how cool is bad ? - 04/25/13 06:58 PM

Quote:

" Only other way oil can get in to the intake runners ( "intake full of oil" )is a bad seal between the heads and intake manifold"
How would this happen with a Indy Valley pan on a BB???
Mike

Oil coming in through the PCV hose.

Posted By: 72Swinger

Re: Engine temp how cool is bad ? - 04/25/13 07:39 PM

I went with baffled breather grommets on my engine. I just run breathers but they reduced oil leaks through and around the breathers down to hardly anything now. Another problem area is the dipstick tube.

Posted By: 70satelliteguy

Re: Engine temp how cool is bad ? - 04/25/13 08:15 PM

" Only other way oil can get in to the intake runners ( "intake full of oil" )is a bad seal between the heads and intake manifold"
How would this happen with a Indy Valley pan on a BB???
Mike

Oil coming in through the PCV hose."

Not trying to be a wise guy Crizila

but how could the oil from the pcv valve in the valve cover going either to the carb or a fitting in the intake manifold via a hose be affected by the seal between the manifold and the heads on a bb with a valley cover?

If the oil were introduced into the hose by blowby or getting sucked past the baffles it would get directly into the top of the manifold before it ever came in contact down where the heads and the manifold are sealed would they not???
Mike

Posted By: Crizila

Re: Engine temp how cool is bad ? - 04/25/13 10:13 PM

Quote:

" Only other way oil can get in to the intake runners ( "intake full of oil" )is a bad seal between the heads and intake manifold"
How would this happen with a Indy Valley pan on a BB???
Mike

Oil coming in through the PCV hose."

Not trying to be a wise guy Crizila but how could the oil from the pcv valve in the valve cover going either to the carb or a fitting in the intake manifold via a hose be affected by the seal between the manifold and the heads on a bb with a valley cover? If the oil were introduced into the hose by blowby or getting sucked past the baffles it would get directly into the top of the manifold before it ever came in contact down where the heads and the manifold are sealed would they not???
Mike

His original post stated "intake full of oil". The objective of the PCV system is to eliminate any cranking venting to the atmosphere. If the PCV valve is working correctly, it should be closed at idle. Above idle, it will open a small amount and introduce a vacuum to the crank case. The PCV hose usually gets its vacuum from the carb base or there abouts. If the PCV valve in the valve cover is not working correctly, not shielded properly from oil splash, or there is excessive engine blow-by, oil will travel down the PCV hose and be introduced in to the intake manifold directly under the carb - and you will have oil in the intake manifold. After market valve covers can often create this problem if they do not shield the PCV valve from oil splash. Only way oil can really get in to the runners on a big block.

Posted By: 74DusterP457

Re: Engine temp how cool is bad ? - 04/25/13 11:12 PM

This sure sounds like you have a leak to me
Are you sure it's not smoking like a mosquito fogger? Using that much oil it should be.
Or you have a puddle on the driveway.
I've experienced oil pressure idiot light switches that leaked like crazy, but the mess was easy to spot. Also had an oil flood inside the car when the copper line to the oil gauge broke at the gauge

Paul

Posted By: cjs69mope

Re: Engine temp how cool is bad ? - 04/26/13 12:36 AM

Well for 32 bucks valve seals seam worth a try.
If its not the seals then something must of gone wrong with the rings break in or the pcv is sucking in a lot of oil.

Posted By: Crizila

Re: Engine temp how cool is bad ? - 04/26/13 03:00 AM

Quote:

Well for 32 bucks valve seals seam worth a try.
If its not the seals then something must of gone wrong with the rings break in or the pcv is sucking in a lot of oil.

GEZ! Why don't you check out the PCV first??? No $, little effort, easy check?????

Posted By: JohnRR

Re: Engine temp how cool is bad ? - 04/26/13 03:21 AM

Quote:

Quote:

Well for 32 bucks valve seals seam worth a try.
If its not the seals then something must of gone wrong with the rings break in or the pcv is sucking in a lot of oil.

GEZ! Why don't you check out the PCV first??? No $, little effort, easy check?????

He did but the finding seems inconclusive. Wise had a great idea to prove or disprove it being the PCV , put a clear fuel filter in the line and see if it gets filled with oil quickly ???

He's been chasing this problem since last summer .

https://board.moparts.org/ubbthreads/show...rue#Post7299460

Posted By: challengermike

Re: Engine temp how cool is bad ? - 04/26/13 03:48 AM

Quote:

Quote:

Quote:

Well for 32 bucks valve seals seam worth a try.
If its not the seals then something must of gone wrong with the rings break in or the pcv is sucking in a lot of oil.

GEZ! Why don't you check out the PCV first??? No $, little effort, easy check?????

He did but the finding seems inconclusive. Wise had a great idea to prove or disprove it being the PCV , put a clear fuel filter in the line and see if it gets filled with oil quickly ???

.
He's been chasing this problem since last summer .

https://board.moparts.org/ubbthreads/show...rue#Post7299460

Or just disconnect it and run another breather in the hole

Posted By: VincentVega

Re: Engine temp how cool is bad ? - 04/26/13 04:33 PM

sorry to hear about the oil problem, I hope it is not something serious

Anyway, to respond to the original question, yes I do think that is too cool. You want a 180 thermo (if you're not running a thermo, get one in there) and you'd like to see the average temps actually hanging around there. Better oil performance, probably better fuel atomization, drivability, and everything. a cold engine will harm cylinder lubrication and foul the oil quickly

if you have too much radiator in the cold weather, consider blocking a large part of it off like they do with big rigs

Posted By: cjs69mope

Re: Engine temp how cool is bad ? - 06/13/13 01:13 AM

Hey guys i know its been a while like i said it would be , Been putting in to many hours at work.
But i just wanted every one to know how things turned out , the car has been back up and running for 2 weeks .
The problem i have been chasing since last summer was caused by the Teflon hard plastic valve seals i had on my heads.
I was unaware that those were bad for street engines and they started wearing out the guides some have 6 to 8 thou clearance .
so the new seals are a temporary fix i know but the car is not smoking now and seams to have more power .
I also changed the springs because i found the the springs i had were dangerously close to coil bind like less the .060 thou.
My plan is to run it this summer and get fresh valve job in winter to correct the guide wear caused by 5 summers of driving on occasion with those dam Teflon seals.
I just don't under stand why the head manufacture would even put those things on in the first place ?
They trying to save money ? leave them off less damage would have resulted!
Drag motors don't need them if the guides are set up right at least not on exhaust side.
Anyway lesson learned Rubber or Viton for street and drag None and
never Teflon again!

Posted By: GTX MATT

Re: Engine temp how cool is bad ? - 06/13/13 01:30 AM

Great, I just bought a set of these and was thinking, why not just spend 10 bucks more for the viton seals, well Comp says to run these. Another 20 bucks down the drain, in addition to the 20 I spent on the valve spring shims I bought from Comp that are what they recommended and WRONG

Posted By: 72Swinger

Re: Engine temp how cool is bad ? - 06/13/13 01:35 AM

I can add that I've learned that you need valve covers with at least as good of baffling as stockers and then utilize a pcv with a Steeda oil separator inline between the pcv and vacuum source. I'm gonna epoxy some plate under my valve covers for baffling and do just that. Also for the breather a filtered catch can plumbed from the opposite valve cover is a good idea for when the engine is ran hard so that pressure can be vented without oil as well.