 Blowin Smoke!, What Now? |
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| ericread |
 Nov 30 2008, 05:52 PM
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The Viper Blue 914  Group: Members Posts: 2,177 Joined: 7-December 07 From: Irvine, CA (The OC) Member No.: 8,432 Region Association: Southern California  |
On Friday, November 28, I drove from Irvine to Van Nuys and back (with a few side trips) to pick up a couple of cases of Brad Penn. A total of about 200 miles. No problems, and my car ran like a champ.
On Saturday, November 23, I replaced the front engine mounts, changed out the distributor cap, replaced the coil with a new Bosch Blue coil and changed the oil. This morning I decided to take a trip from Irvine to Temecula over the Ortega highway (twisty mountain hiway) returning via I-15 and highway 91. About 150 miles. 40 miles into the trip I notice that I am blowing smoke upon taking my foot off the accellerator. Actually, once I hit the acelerator after coasting I get about a 2 to 3 second cloud of blue/grey smoke from the tail pipe. I continue my trip, but the smoke seems to occur any time I slow down/accellerate at hiway speeds, or even shift. During my drive, my engine is running great! No missing, no vibrations, and the CHT never cracks 370 in fifth gear at 4000-RPM (~80MPH). The first think I thought was valve guides, but why would this ocurr in such a sudden manner? And if it is, what next? The engine is really running great, and I'm getting about 25 combined mpg. What are your thoughts, and what's my troubleshooting process? My thanks in advance Eric Read |
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| Jake Raby |
Nov 30 2008, 07:06 PM
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
Sounds like you may have a valve guide thats become loose in the head.. Smoke on decel is a direct symptom of an issue with the oil control rings or intake valve guides.
Don't drive it until you do a thorough inspection of the intake valve guides.... ANY valvetrain related issue can occur without any prior symptom, hence the reason why we absolutely over build everything related to heads and valve train. This post has been edited by Jake Raby: Nov 30 2008, 07:11 PM |
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| ericread |
Nov 30 2008, 07:13 PM
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#3
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The Viper Blue 914 Group: Members Posts: 2,177 Joined: 7-December 07 From: Irvine, CA (The OC) Member No.: 8,432 Region Association: Southern California |
QUOTE(Jake Raby @ Nov 30 2008, 05:06 PM)  Sounds like you may have a valve guide thats become loose in the head.. Smok on decel is a direct symptom os an issue with the oil control rings or intake valve guides. Don't drive it until you do a thorough inspection of the intake valve guides.... ANY valvetrain related issue can occur without any prior symptom, hence the reason why we absolutely over build everything related to heads and valve train. Jake; What's the process I should use to inspect the intake valve guides? Can I do this myself? Do you have a tutorial on your BBS? (I logged in and looked, but couldn't find a reference). My thanks. Eric |
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Posts in this topic
ericread Blowin Smoke! Nov 30 2008, 05:52 PM
r_towle Timing may be off...check it.
To much oil...check ... Nov 30 2008, 06:28 PM
ericread
Timing may be off...check it.
To much oil...check... Nov 30 2008, 07:07 PM r_towle Without pulling the head and removing the valve th... Nov 30 2008, 07:36 PM r_towle
The engine is really running great, and I'm g... Nov 30 2008, 07:38 PM Jake Raby Pull the valve covers. Pull the rocker assemblies.... Nov 30 2008, 07:40 PM r_towle
Pull the valve covers. Pull the rocker assemblies... Nov 30 2008, 07:43 PM ericread Stock 2.0L engine, stock FI. Once I determine tha... Nov 30 2008, 07:56 PM ericread
Stock 2.0L engine, stock FI. Once I determine th... Nov 30 2008, 08:13 PM r_towle tune up again...
25mpg is wrong.
It could be runni... Nov 30 2008, 08:07 PM ericread
tune up again...
25mpg is wrong.
It could be runn... Dec 1 2008, 08:18 PM r_towle What year is it?
What motor...
There is more you ... Dec 1 2008, 08:20 PM ericread
What year is it?
What motor...
There is more you... Dec 1 2008, 08:29 PM |
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