Replaced the head gasket and now it won't start

AMJR300

MEMBER
1994 FORD PROBE
111 MILES

HI, I have just replaced the head gasket and now the car won't start I have double checked the cam timing and triple checked the timing belt and all is good, the engine will turn over and backfires through the throttle body, I have replaced spark plugs and leads.

5 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

Make sure the compression is good first. The backfiring could be you have the plug wires on the wrong plugs. Check your firing order. I would help but you did not identify your motor size.

Roy

Was this

answer

helpful?

Yes

No

Monday, October 17th, 2011 AT 1:46 AM

AMJR300

MEMBER
4 POSTS

I have the leads in the right place and it is a V6. There is one thing that bugs me is that when I line up the camshaft on the rear I have to advance it half a tooth forward then put the timing belt on, crank it over two revolutions and all timing marks line up. If I have all camshafts at their timing marks then put the timing belt crank it over two revolutions the rear camshaft is behind one tooth. Which is correct or are neither, and it is someting else causing this to happen?

SPONSORED LINKS

Was this

answer

helpful?

Yes

No

Monday, October 17th, 2011 AT 4:48 AM

ASEMASTER6371

MECHANIC
52,797 POSTS

It is about the slack in the belt. That why it is off when you set it initially. You did it right. Once it is tensioned up, it moves one of the cams off. You have to compensate for it like you did.

Roy

Was this

answer

helpful?

Yes

No

Monday, October 17th, 2011 AT 1:33 PM

AMJR300

MEMBER
4 POSTS

Could the rear cam be on the exhaust stoke and how many teeth should the timing belt have?

Was this

answer

helpful?

Yes

No

Tuesday, October 18th, 2011 AT 12:33 PM

AMJR300

MEMBER
4 POSTS

Just letting you know that I towed the car the mechanics and after 3 hours he worked out that the Front timing belt pulley was put on back to front making that head 180' out, he has since corrected this and it starts fine everytime but when the revs are increased it backfires through the intake he then did a compression test and found that the whole motor has no compression meaning there is something wrong with the bottom end of the motor.