Jump to content

Server Lease Renewal/Software Licenses

Our yearly server lease, software licenses, as well as hardware operating costs, ARE due Dec 6th, 2021. Our current donations have fallen far short of the funds we need to renew. Please remember the RennTech.org community is Member supported so please consider a donation to help...  THANK YOU!

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)

2003 996 C4S Engine Failure - Coolant in Oil


Recommended Posts

Hi,

2003 996 C4S 146,000KM on the clock.

i haven't driven my car much this past year, only 4,000KM (2,500 Miles). I always maintain my car properly and change oil religiously...

while driving with the Porsche club, and without no temperature rise, i heard an explosion in the engine bay, the car stalled and the whole dashboard lit up.

when i opened the engine bay, coolant was all over the place... photos from the independent workshop show that the oil reservoir is filled with coolant... Hydrolock is suspected with all possible scenarios being gloomy...

would appreciate your input on previous similar experiences... could it be only a failed AOS and not a cracked head or engine block??

the workshop will charge me around 1,300$ for investigating the problem, which will not be charged if i decide to go ahead with a top end rebuild or whatever the diagnosis is...

Is it worth investigating now, or i can leave the car parked for a while without any consequences? Is the coolant inside the engine bay terrible in the long run? would it be impossible to clean out if left inside?

thanks,

Nehme

post-50282-0-40836300-1393187197_thumb.j

post-50282-0-24279400-1393187208_thumb.j

post-50282-0-47184700-1393187230_thumb.j

post-50282-0-91477100-1393187243_thumb.j

post-50282-0-24302000-1393187360_thumb.j

Link to comment
Share on other sites

Sorry to hear that Nehmaiz, I feel for you.

I am not a mechanic but found this on the web;

Hydrolock most commonly occurs in automobiles when driving through floods, either where the water is above the level of the air intake or the vehicle's speed is excessive, creating a tall bow wave. A vehicle fitted with a cold air intake mounted low on the vehicle will be especially vulnerable to hydrolocking when being driven through standing water or heavy precipitation. Engine coolant entering the cylinders through various means (such as a blown head gasket) is another common cause. Excessive fuel entering (flooding) one or more cylinders in liquid form due to or other abnormal operating conditions can also cause hydrolock.

Regards

Richard

  • Upvote 1
Link to comment
Share on other sites

  • Moderators

Hi,

2003 996 C4S 146,000KM on the clock.

i haven't driven my car much this past year, only 4,000KM (2,500 Miles). I always maintain my car properly and change oil religiously...

while driving with the Porsche club, and without no temperature rise, i heard an explosion in the engine bay, the car stalled and the whole dashboard lit up.

when i opened the engine bay, coolant was all over the place... photos from the independent workshop show that the oil reservoir is filled with coolant... Hydrolock is suspected with all possible scenarios being gloomy...

would appreciate your input on previous similar experiences... could it be only a failed AOS and not a cracked head or engine block??

the workshop will charge me around 1,300$ for investigating the problem, which will not be charged if i decide to go ahead with a top end rebuild or whatever the diagnosis is...

Is it worth investigating now, or i can leave the car parked for a while without any consequences? Is the coolant inside the engine bay terrible in the long run? would it be impossible to clean out if left inside?

thanks,

Nehme

Leaving coolant sit in the oil sump will destroy any possible future for this engine, if it even has one, so don't go in that direction. As these engines never blow head gaskets, you probably have either cracked a cylinder liner or a cylinder head. You need to have the problem diagnosed by pulling the spark plugs and dropping a bore scope into each cylinder to see where the engine has failed, or by simply pulling the engine and having it checked out on a stand. Realistically, the engine is going to have to come out anyway, so I would just pull it and find out if it can be salvaged.

  • Upvote 1
Link to comment
Share on other sites

Sorry to hear about your issue Nehme it's what we all dread. Were you able to establish the source of the coolant which was all over the engine bay? Blown out of the oil filler? Who is doing the work for you?

Thanks Mcbit500... the car is at Alex renner motors (ARM) at the moment, he's still waiting on my decision whether to go ahead and investigate the failure or not...

honestly if the most likely scenario is that i have to scrap my engine, i prefer not to investigate where the failure happened and pay 4,500 AED (1,226$)...

According to ARM to fix a blown/cracked cylinder head will cost me around 65,000 (17,687$) to 75,000 AED (20,000$) ! A brand new engine from dealer will cost 144,000 AED (39,000$)...

it's such a dilemma especially when i love this car (2nd owner since new) and have driven it for over 100,000 KM in 5 years with no major issues at all...

Link to comment
Share on other sites

Well at least its, in my opinon, in the best hands in the Emirates; some hard choices ahead. AED 144k seems a lot for a new engine though as most people on the forums are quoting $20k, which I believe I would stretch to, to keep my C4S on the road. I haven't had mine for that long but I'm already deeply attached to it. Good luck with Alex!

Link to comment
Share on other sites

Did they boroscope into the spark plug holes.

If that isn't turning over by hand -- might have a cracked cylinder wall.

If you had a hydrolock, the other possibility is a bent rod.

If this happened there is a good chance you can save the engine. It won't be easy to disassemble -- but if done carefully,

you might get away with just replacing the rod.

Of course you'll want to find the source of the hydrolock issue to begin with and replace all bearings as

antifreeze is caustic to softer metals.

thanks,

mike

Edited by txhokie4life
Link to comment
Share on other sites

  • 3 months later...

An update regarding the problem with my engine.

 

attached is a photo of the cracked engine block. the block was completely cracked throughout the middle.

 

I have no idea what might've led to this, I have since sourced an engine and fitted it into my car. the car is happily back on the road.

 

thinking of dismantling the old block to see exactly what went wrong, any good DIY on how to tear down the block?

 

Thanks,

Nehme

 

post-50282-0-77882500-1403536172_thumb.j

post-50282-0-58785300-1403536217_thumb.j

Link to comment
Share on other sites

Wow that's crazy, I've never heard of a cracked engine block before.  You definitely want to find out how this could happen.

 

Where did you get the new engine, and how much did that cost you?

 

Exactly my thoughts when i saw the cracked block... i found a front accident 04 C4S in a scrap yard with an engine that has 18,000 KM on the odo.... snapped it on the spot for approx 5,500USD (block only)

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.