On my 05 Super V8 it's weeping coolant where the pump meets the block, I'm thinking of using stop leak, any pros and cons on that and any recommendations on what stop leak to use..

 

Locate and repair the leak. Most likely a hose or water pump.

Do not attempt to use stop leak as it will create a new host of issues down the road.

 

Hi vettecat,

I agree with abonano. Just replace what is leaking. Most likely the water pump by your description. They are not that expensive and if you do the work yourself it just takes some time taking all the other items off to get to the water pump. If you are going to change the water pump then watch out for the bolts that hold the pump to the block. If they have not been replaced in a long while or at all then you will most likely round off the head of the bolt trying to get them open. I rounded one and had to use a bolt grip socket to grip it without the corners and open it.

Cheers,

Chris

 

Fully agree with Chris here.

Use a 6 point 8mm socket, not a 12 point socket. I rounded off one of the bolts. Ultimately I had to dremel the bolt head off and luckily the heat from the dremel made easy work of spinning the remaining bolt shaft out.

Changing out the water pump not bad on the SC engine.

Bolt torque 8Nm plus (they say 90 deg) but 45 deg will suffice. Just dont over tighten the bolts upon reinstall.

 

Never ever use stop leak!!!!!!!!!!!!!!!!!!!!!

 

As stated, If you use stop leak, you will posting a lot of other issues on this forum, and will still have to change the pump.

 

Hi vettecat,

Get yourself a set of these bolt grips in case you round off a bolt as I mentioned in my earlier post and as abonano mentioned. I used a six sided socket and still rounded a bolt.

These work really well and saves you having to drill out the bolt if you need. These come with an 8mm one so perfect for the job. Not sure how much they are in the US but they are only £20 over here in the UK at the moment.
Irwin Bolt Grip Nut Remover Set

Thanks,

Chris

 

Thanks Chris..see my reply posted to Greg above. So, "taking all the other items off to get to the water pump (and hoses and worm drive clips etc. etc)...let the fun begin.
any comments regarding total removal of the emission pump and what to do with the hoses?

 

Hi ChrisTX, mine was an NA so I'm not sure what the emission pump is. It's actually very straight forward on the NA, and only involves taking lots of things off the front of the car above and around the water pump area including air intake, radiator hoses etc. I did my thermostat housing (inc thermostat and coolant temp sensor) at the same time so I had lots of things removed as well. I also replaced the serpentine belt at the same time as I was in that area and the old one had got coolant on it from the leak I had. Good luck with yours.

 

Hi JX350...To get to grips with the leak issue and before I remove the "emission pump", I'll take a photo and post so as to identify the item. I will also take the time to replace the serpentine belt. I'll post pics as I go along on this thread.
chris

 

Great idea ChrisTX. Someone will help if they know what it looks like. Its definitely a good chance to do the serpentine belt at the same time. And, if you can, do the thermostat housing if it hasn't been done for a long time as these break down internally, the plastic breaks down and cracks and good to do whilst you've got all the other items off in that same area. I took a load of photos when I did mine but I just haven't had the time to put a guide together yet. All the best.

 

Hi, JX350..thanks again for your response. BTW..if you have a photo of the "thermostat housing" you mention, could you please post just in case I confuse it with something quite unrelated like a gearbox or tailpipe!!

 

I started this thread ( Pre COVID) in August. I took everyone's advice & did not use any stop leak, nor have I done anything else other than change both my belts. I continue to drive the car, a thousand miles trip & 500 or so miles & it's nothing but a minor weep! When the time comes, I Wii do the work myself. I appreciate all the advice & wish the best of luck to all off you doing your own work. Thank you!

 

Hi ChrisTX, Is your car a V6 or a V8? If it's a V8 then is it NA or an SC?

 

Glad it's not got any worse Vettecat. And good luck for when you do get around to tackling it. Cheers

 

Does sound like the overflow tank

 

Hi JX350...Jaguar is a 1993 XJS 6 cylinder 4.0 liter Coupe...much younger than yours!

 

Hi ChrisTX, Ah I guess you might need to ask in the forum for your car. I've only done the job on my X350. That's why I didn't know what you meant by "emission pump". Thanks, chris