| Texas-Saluki |
03-14-2008 08:38 PM |
Blown Head gasket (I think) - KCR408
I just took the car out for a spin today and when everything was cooled down I was checking some of the fluids and noticed oil in the radiator:CRY:
My assumption is this is a blown head gasket... but any other things it could be?
I left a message for Rob at KCR to see if he can get it quickly replaced...hope I can get this done in time for Austin :(
Also a quick question for the group... my oil pressure is running a bit over 25, seems low. Think I should have KC install a high flow pump also? (it has always been at this level)
Thanks
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| Madmiles442 |
03-14-2008 08:44 PM |
Wow, Chris, 25 seems really low.
Mine's around 50 cold and 35 hot.
Oil in the coolant, not sure what else it could be.
If their schedule allows, should be do-able before Austin.
Keep us up to date - if their schedule doesn't allow, we can pull together a group and do this ourselves.
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| lineslinger |
03-14-2008 08:54 PM |
25 PSI is way to low an OP for any RPM other than idle.
Give some background/history about the engine, existing info is too vague to offer any constructive info.
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| thudmaster |
03-14-2008 10:45 PM |
Has it always been 25 lbs?
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| 427Aggie |
03-15-2008 02:02 AM |
Rob was stuck under a 57 chevy all day and when I left at 6:20 after dropping some things off for my 500 he said he had another 6 hours under it..Apparently the owner has a car gathering he wants it in tomorrow.
I'm going by there tomorrow to pick up my satellite and put it out at the new house so I will check with him then Chris. If you have oil in the coolant you either have a head gasket or an intake gasket(this would be better). When you say you are running 25psi pressure is that at idle or under load?
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| Texas-Saluki |
03-15-2008 07:14 AM |
Oil Pressure
The oil pressure is always 25 lbs... well maybe when it starts it is a bit higher (30 ish) but it does not move much underload if any at all.
I did buy a new pick up thinking that it could be messed up... but I was thinking about it last night... I need to find the scale the pickup outputs and can then measure with a DMM to determine if it is working somewhat correctly
It has always been at 25...from the first day I fired it up. If I recall when I asked Keith about it he said it should be fine :confused:
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Chris:
Pull all the plugs and do a compression check. That should tell you if the gasket is blown. Second, look for a high volume rather than a high pressure pump. Pressure does strikes me as a bit low if it's 25 psi over 2000 rpm but an engine with clearances built it will run at a lower pressure in favor of higher flow.
DonC
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| Texas-Saluki |
03-15-2008 12:55 PM |
since there is oil in the radiator but not coolant in the oil... could this be any other problem?
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| CHANMADD |
03-15-2008 01:40 PM |
More likely an intake gasket imo, 25psi over 3000 rpm is not good,10 psi per 1000 rpm??:cool:
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| CHANMADD |
03-15-2008 01:50 PM |
If it has always been only 25 psi it could be a restriction somewhere that has now caused a crack or a leak of oil into the coolant.There is really nowhere in the engine that the oil should mix in the coolant even with a blown gasket.A head gasket would put coolant in the oil, not oil in the coolant. Very curious!!!??
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| Texas-Saluki |
03-15-2008 02:00 PM |
Quote:
Originally Posted by CHANMADD
(Post 825087)
If it has always been only 25 psi it could be a restriction somewhere that has now caused a crack or a leak of oil into the coolant.There is really nowhere in the engine that the oil should mix in the coolant even with a blown gasket.A head gasket would put coolant in the oil, not oil in the coolant. Very curious!!!??
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well I am going to do a compression check this afternoon... but it seems like it is the intake maybe the problem... hope I don't have a larger issue.
I may also try and find a oil pressure tester to determine if my gauge or sender are bad... I have always thought it was low... but this motor does not even have 3k miles on it %/
back to the shop I go |
| Rwillia4 |
03-15-2008 03:37 PM |
What weight oil are you running? where is your oil PSI gauge located on tne engine? what is the P?SI at start-up?
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| vector1 |
03-15-2008 04:34 PM |
i had the same problem with my engine on the cobra i bought, maybe its a jbl thing. :D get a leakdown tester and check your cylinders. that'll tell you real quick. on the pressure thing 25 at idle won't hurt, you just want more when the rpm's pick up.
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| Texas-Saluki |
03-15-2008 04:41 PM |
Quote:
Originally Posted by Rwillia4
(Post 825117)
What weight oil are you running? where is your oil PSI gauge located on tne engine? what is the P?SI at start-up?
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It is 20W-50...as for where it is located... I think the normal pickup location??
Quote:
Originally Posted by vector1
(Post 825132)
i had the same problem with my engine on the cobra i bought. get a leakdown tester and check your cylinders. that'll tell you real quick. on the pressure thing 25 at idle won't hurt, you just want more when the rpm's pick up.
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I just finished my compression test and all of the cylinders are between 150-140 so it does not appear to be a head gasket problem |
| CHANMADD |
03-15-2008 05:35 PM |
Just a quick thought. Do you have an automatic transmission with a cooler in the radiator?
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| vector1 |
03-15-2008 06:17 PM |
Quote:
Originally Posted by Texas-Saluki
(Post 825133)
It is 20W-50...as for where it is located... I think the normal pickup location??
I just finished my compression test and all of the cylinders are between 150-140 so it does not appear to be a head gasket problem
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that was with a leakdown tester? cause sometimes turning the motor over with compression tester won't show it. |
| Texas-Saluki |
03-15-2008 07:15 PM |
no... I think I would be shot for having an automatic on a cobra :3DSMILE:
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| vector1 |
03-15-2008 07:23 PM |
Quote:
Originally Posted by Texas-Saluki
(Post 825170)
no... I think I would be shot for that :3DSMILE:
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?????????
how do you like your fuel injection? i'm thinking of doing that to mine. |
| Texas-Saluki |
03-15-2008 07:29 PM |
the EFI is nice... it runs the same no matter what the weather conditions
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| CHANMADD |
03-15-2008 07:29 PM |
Just checking...How much oil was in the coolant and where did you see it?
John
;)
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