Go Back   TeamTalk > Maintenance Tips, How-tos and Refurbishing Topics > Engine / Drive Train

Reply
 
Thread Tools Display Modes
  #21  
Old 06-29-2013, 02:35 PM
SWGA Boater's Avatar
SWGA Boater SWGA Boater is offline
TT Enthusiast
 
Join Date: Oct 2012
Boat: Not a MasterCraft
Location: Southwest Georgia
Posts: 203
Ran engine this morning. Checked to ensure that I had good vacuum on the PCV hose and that the PCV was opening. It was. No oil coming from the dipstick tube. Does not do it in the yard with engine 1500 rpms plus. Forgot to take a picture, but my setup is like this:


Also took a video of the engine running:
http://youtu.be/4NIAoosPuWw

Excessive smoke, running rich or possibly water related? Remember it did run hot earlier. Could a blown head gasket do this and be my crankcase problem? No skips or rough idle or running. Compression seemed good. Look specifically about 20-25 secs and you can see excessive oil in the exhaust water on the concrete.
Reply With Quote
  #22  
Old 06-29-2013, 02:56 PM
mikeg205's Avatar
mikeg205 mikeg205 is online now
Moderator
 
Join Date: Aug 2011
Boat: 1995 Pro Star 205 5.7 Liter
Location: Plainfield - Joliet, IL
Posts: 11,172
Send a message via Skype™ to mikeg205
looks more like steam than smoke based on color.... blown head gasket I believe would give you erratic running. Pull the plugs see if any are oily or black. How are the water passage ways on the port side?
__________________
...A bad day water skiing still beats a good day at work...1995 Pro Star 205....
Reply With Quote
  #23  
Old 07-09-2013, 10:06 PM
SWGA Boater's Avatar
SWGA Boater SWGA Boater is offline
TT Enthusiast
 
Join Date: Oct 2012
Boat: Not a MasterCraft
Location: Southwest Georgia
Posts: 203
Got tired of waiting on the local parts store's warehouse to have a leakdown tester come in. Ordered one from Summit and it came in today. Anxious to see if blow by is the root of my problem. Will report back after running leak down test.

Also, a few replies back someone mentioned an over filled crankcase causing excessive pressure. I filled with oil until it was dead on the full mark on the dipstick (after running). This was about 5.5 quarts with the filter change. I looked in the owner's manual but did not see an oil capacity listed. I would not think this was overfilled and causing my problem, but how many quarts does it take usually for other's oil changes?

Also, replaced the right exhaust manifold gasket (small leak) and valve cover gasket in the meantime....I checked and did not notice any blockage in the manifold though (steam issue Mike referred to).
Reply With Quote
  #24  
Old 07-18-2013, 09:29 PM
SWGA Boater's Avatar
SWGA Boater SWGA Boater is offline
TT Enthusiast
 
Join Date: Oct 2012
Boat: Not a MasterCraft
Location: Southwest Georgia
Posts: 203
Finally had a chance to run a leak down test. Results as follows:

Regulator set at 100psi

#1---85psi
#2---88
#3---91
#4---93
#5---84
#6---89
#7---91
#8---82


Any thoughts on these numbers? Anything else to try?

Thanks,
Ansley
Reply With Quote
  #25  
Old 07-20-2013, 03:23 PM
SWGA Boater's Avatar
SWGA Boater SWGA Boater is offline
TT Enthusiast
 
Join Date: Oct 2012
Boat: Not a MasterCraft
Location: Southwest Georgia
Posts: 203
Any thoughts on the leakdown numbers? Was reading where you should expect 10-15% leakdown. I'm in that range except on a few cylinders but there was not a massive drop on any one cylinder.
Reply With Quote
  #26  
Old 07-20-2013, 03:28 PM
mikeg205's Avatar
mikeg205 mikeg205 is online now
Moderator
 
Join Date: Aug 2011
Boat: 1995 Pro Star 205 5.7 Liter
Location: Plainfield - Joliet, IL
Posts: 11,172
Send a message via Skype™ to mikeg205
I agree - Those look pretty good compared to starting point IMO...
__________________
...A bad day water skiing still beats a good day at work...1995 Pro Star 205....
Reply With Quote
  #27  
Old 07-20-2013, 03:52 PM
SWGA Boater's Avatar
SWGA Boater SWGA Boater is offline
TT Enthusiast
 
Join Date: Oct 2012
Boat: Not a MasterCraft
Location: Southwest Georgia
Posts: 203
Thanks Mike. The only thing I can think is when the boat is under a load it is changing the issue. Running in yard idling engine runs like a top, take it on the water for a short run blow by shows up.
Reply With Quote
  #28  
Old 07-20-2013, 04:00 PM
mikeg205's Avatar
mikeg205 mikeg205 is online now
Moderator
 
Join Date: Aug 2011
Boat: 1995 Pro Star 205 5.7 Liter
Location: Plainfield - Joliet, IL
Posts: 11,172
Send a message via Skype™ to mikeg205
isn't there a spec for leak down numbers for your motor? I always thought numbers were above 150psi..?
__________________
...A bad day water skiing still beats a good day at work...1995 Pro Star 205....
Reply With Quote
  #29  
Old 07-20-2013, 04:11 PM
j.mccreight@hotmail.com's Avatar
j.mccreight@hotmail.com j.mccreight@hotmail.com is offline
MC Maniac
 
Join Date: May 2010
Boat: 1989 MasterCraft TriStar 190 SE
Location: Houston, TX
Posts: 3,262
Yes a normal motor will show 10-15% leakage, your numbers are mostly good, cylinder 8 is iffy at best, I would start looking at #8, anything above 15% and you need to start thinking about investigating and possible rebuild. I recently did a leak down test on a 5.6L titan with 135,000 miles none were over 8%. I would clean top end, pistons etc. Mix up some atf/ water mix 50/50, (marvel mystery oil can also be used)remove all spark plugs insert several teaspoons full of mix into each plug, let soak for 10-20 minutes while slowly rotating engine over by hand every few minutes, then spin engine over with starter motor, plugs still out to remove excessive atf mix, install plugs, it will smoke like a chimney until all atf is burned off, run it for a while, let cool down a bit and recheck leak down warm.
__________________
James

1989 MasterCraft TriStar 190 SE

Last edited by j.mccreight@hotmail.com; 07-21-2013 at 09:22 AM.
Reply With Quote
  #30  
Old 07-20-2013, 04:13 PM
j.mccreight@hotmail.com's Avatar
j.mccreight@hotmail.com j.mccreight@hotmail.com is offline
MC Maniac
 
Join Date: May 2010
Boat: 1989 MasterCraft TriStar 190 SE
Location: Houston, TX
Posts: 3,262
Quote:
Originally Posted by mikeg205 View Post
isn't there a spec for leak down numbers for your motor? I always thought numbers were above 150psi..?
Perhaps you are thinking of compression numbers, you are wrong, minus 7 mcocd points for you.
__________________
James

1989 MasterCraft TriStar 190 SE
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


All times are GMT -4. The time now is 01:01 PM.