If you are familiar with the fuel injection, valves and piston heads cleaning process using a product such as Seafoam, then you probably have performed the cleaning process by using the PCV valve on a car to suck or draw the product into the motor like a vacume. You do so with about 1/2 a can, let is sit for 5 minutes with the motor off, then fire it up and you have a white cloud of smoke that will cause your neighbor to call the fire department. However, this process removes all carbon deposits from the valves and pistons. I want to give my XJR a treatment, but I am not sure if there is a PCV valve on it, and if so, where is it located? Any help would be much appreciated.

 

Good question.....i would love to know also.

 

Bump to this thread

 

Mooreman,

I've always been a skeptic of miracle products in a can for machinery that is in operation. Never saw any positive results and several times negitive results i.e. knocked out or degraded sensors, softened seals, eaten up hoses, degraded plastics, etc.
Given the number of sensors and seals in the induction and exhaust systems of an XJR Jag I have my doubts. If you do this treatment, don't neglect to let us know how it turned out in objective terms.
Plan to be in Ashburn at Christmas with my XJR. Love to see your ride if you got the time.

 

From a lifetime's experience of playing with motors large and small: Seafoam will not do anything for an engine in good condition. It's a band-aid for ailing motors overdue for overhaul and/or a gasoline preservative for storage.

Engines in good condition don't have 'carbon build' up on pistons, valves or anywhere else that needs getting rid of.

 

I ran a bottle in my tank last week without any problems or codes. The car ran great before and had so change in performance or idling.

 

I put my car into storage for the winter and have always put the car away with a full tank of gas with one can of Seaform and Stabil.The car sit for six months and the last thing I need is bad gas.

 

Gas in a sealed container (like a gas tank on a modern car) is good for about a year.

http://www.chevron.com/products/ourf..._gasoline.aspx

 

Gas begins to deteriorate in 60 days. I'm not worried about bad gas, I use Seafoam (or BG44K) to clean the injectors and any other build-up. Today's gas has 10% ethanol, which is not the best thing for engines, therefore varnish and other build-ups occur in engines (my understanding) over an extended period of time. I have 64k on my car, I assume it would benefit from a cleansing treatment.

 

Incorrect on the ethanol causing varnish or build ups. There's tons of myths out there, this is one of them. All modern cars are built with 10% ethanol in mind. I've been using this fuel for almost 20 years in all my cars bikes and toys with no ill effects or special mtce. required.

Again, Seafoam is good for it's original stated purpose, but the key is that it will not fix things that are not broken.

 

Has anyone tried to suck it in the intake manifold until the car stalls and wait 5 minutes? I'm curious if you can do it without any effect. I've tried it on my girlfiends car and it smoked for like 20 minutes! The car had 115K and never had a fuel injector cleaner in it. I did the same on my 95 mustang with a newer H-pipe with cats and it didn't smoke. I also used it on my 00 Cherokee with 146K and she also smoked. I'm wondering if it helped clean out the cats and intake?

 

Has anyone here Seafoamed their XJR engine? If so, what hose did you pull to get the product into the intake? I know very well that some people don't believe in using "snake oils" such as this. I am only asking which hose to pull, not trying to start a debate.

 

Chevron and Texaco gas has Techron mixed into it. Techron is an upper cylinder and valve cleaner. You can buy a can of it in concentrate form and mix it in a tank of gas, but I think it's better to use the gas from the above mentioned stations. JMHO.

 

And so starts the "best snake oil" debate... again!

 

How true.

In an effort to answer the question, I'd suggest that it doesn't really matter which tube is used. A placebo is a placebo.

 

I never thought of Techron as snake oil.

 

I drive to fast to get carbon deposits.

Also, the alcohol in our fuel helps remove carbon in the engine. It is the rubber and steel parts that are harmed by the alcohol.

 

Looks like another opinion given on additives without helping by answering my original question.